S02.92XA

🧬 ICD-10-CM S02.92XA — Unspecified Fracture of Facial Bone, Initial Encounter for Closed Fracture

Billable Code Confirmed

ICD-10-CM S02.92XA is a valid, billable 7-character ICD-10-CM code for FY2026. All 7 positions confirmed: S02 (fracture of skull and facial bones) + .9 (unspecified skull/ facial bones) + 2 (facial bone, unspecified) + X (required placeholder) + A (initial encounter for closed fracture).

Non-Billable Parent Codes — Never Submit These

• ❌ S02.9 — 4-character subcategory — non-billable header
• ❌ S02.92 — 5-character — non-billable; missing placeholder and 7th character
• ❌ S02.92X — 6-character — non-billable; 7th character required

Always submit S02.92XA (all 7 characters) for an initial encounter, closed, unspecified facial bone fracture.

⭐ Use Only When Specific Bone Cannot Be Identified

ICD-10 CM S02.92XA is the least specific code in the S02 facial fracture family. It should only be assigned when:

• Imaging has not yet been obtained and a specific bone cannot be confirmed (e.g., initial ED triage before CT results)
• Imaging is obtained but is truly inconclusive as to which specific facial bone is fractured (rare)
• The physician documents only “facial fracture” without specifying the bone AND no imaging clarifies the specific bone

Once CT facial bones confirms a specific fracture location, a more specific code must replace S02.92XA. Using S02.92XA as a final code when imaging clearly identifies a specific fracture is a coding accuracy failure and a CDI gap. See the Code Tree section for the specific facial bone codes.

⭐ CIC Exam Concept — Fracture 7th Characters (6 Options)

Fracture codes in Chapter 19 use a 6-option 7th character set — significantly more complex than the 3-option set (A/D/S) used for wounds. This is one of the most tested Chapter 19 concepts on the CIC exam. The fracture 7th characters map to the healing trajectory of the fracture:

INITIAL ENCOUNTERS (Active Treatment):
  A = Closed fracture, initial encounter
  B = Open fracture, initial encounter

SUBSEQUENT ENCOUNTERS (After Active Treatment):
  D = Subsequent, routine healing
  G = Subsequent, delayed healing
  K = Subsequent, nonunion

LATE EFFECTS:
  S = Sequela

Why this matters: G (delayed healing) and K (nonunion) drive additional clinical documentation, potential surgical intervention coding, and may affect DRG tier via CC status. A nonunion fracture coded as K signals a significantly more complex clinical scenario than routine healing (D) — the difference must be reflected in the physician’s documentation.

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🔍 Code Description

ICD-10 CM S02.92XA classifies an unspecified fracture of a facial bone, initial encounter for a closed fracture — meaning the patient is presenting for active treatment of a facial fracture where the specific fractured bone has not yet been identified, and the fracture does not communicate with the external environment (skin and overlying mucosa are intact over the fracture site).

“Facial bones” in ICD-10-CM encompass the bony skeleton of the face below the skull vault — the mandible, maxilla, zygoma (malar), orbital bones, nasal bones, lacrimal bones, palatine bones, inferior nasal conchae, and vomer. This code represents the unspecified starting point when clinical evaluation has confirmed a facial fracture but specific bone identification awaits imaging or further workup. It should be considered a provisional code — the goal is always to assign the most specific facial bone fracture code available once confirmed.

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⭐ The Fracture 7th Character Set — Complete Teaching Reference

The fracture 7th character set is the most complex encounter-type system in all of Chapter 19, and the most important to master for the CIC exam. Unlike wound codes (3 options: A, D, S), fracture codes carry 6 options that follow the entire healing lifecycle.

Full 7th Character Table — S02.92X_

7th Char	Code	Phase	Description	When to Use
A	S02.92XA	Initial — Closed	Active treatment of a closed fracture	First ED visit, first clinic evaluation, first surgical repair — skin/mucosa intact over fracture ← THIS CODE
B	S02.92XB	Initial — Open	Active treatment of an open fracture	Fracture communicates with external environment — skin wound, mucosal tear, bone visible/palpable through wound
D	S02.92XD	Subsequent — Routine	Follow-up during normal healing	Routine post-op checks, cast/splint management, healing progressing as expected
G	S02.92XG	Subsequent — Delayed	Follow-up with slower than expected healing	Physician documents healing delay — callus formation behind schedule, inadequate radiographic progression
K	S02.92XK	Subsequent — Nonunion	Fracture has failed to heal	Bone ends not uniting after expected healing timeframe; may require ORIF, bone grafting, or hardware revision
S	S02.92XS	Sequela	New condition caused by the original fracture	Malocclusion, chronic pain, nerve damage, cosmetic deformity documented as direct late effect of the fracture

The Most Misused 7th Characters — G and K

Coders frequently default to D (subsequent, routine healing) for ALL follow-up fracture encounters without interrogating the clinical record for healing status. This is a significant coding accuracy error — and a missed CDI opportunity.

When to look for G or K instead of D:

• Physician documents “healing slower than expected,” “delayed union,” “inadequate callus formation,” “healing not progressing” → G (delayed healing)
• Physician documents “nonunion,” “failed to heal,” “no bridging callus,” “fibrous union,” “pseudarthrosis” → K (nonunion)
• Patient is returning for surgical revision, bone grafting, or hardware removal due to healing failure → likely K

G and K may carry CC status depending on the claims grouper and payer — they represent clinically more complex scenarios than routine healing and should be captured accurately every time they are documented.

The Healing Trajectory — Visual Reference

INJURY EVENT
     │
     ▼
Active treatment begins
     │
     ├─── Skin intact? ──────────────► 7th char A (closed)
     └─── Bone through skin/mucosa? ─► 7th char B (open)

ACTIVE TREATMENT CONCLUDES
     │
     ▼
Follow-up / healing monitoring
     │
     ├─── Healing normally? ─────────► 7th char D (routine)
     ├─── Healing slow? ─────────────► 7th char G (delayed)
     └─── Not healing? ──────────────► 7th char K (nonunion)

FRACTURE FULLY HEALED (or chronic)
     │
     └─── New problem caused by fracture? ► 7th char S (sequela)
          [sequela condition sequences FIRST; S02.92XS is additional]

Open vs. Closed — The A vs. B Decision

What Makes a Facial Fracture "Open" (7th Character B)?

For long bone fractures, “open” typically means bone protruding through skin. For facial fractures, the definition is broader — a facial fracture is considered open when the fracture communicates with any external environment, including:

Communication Pathway	Clinical Presentation	Example
External skin laceration	Bone visible/palpable through wound	Zygoma fracture with overlying cheek laceration down to bone
Oral mucosal tear	Fracture visible intraorally	Mandible fracture with gingival laceration
Nasal mucosal disruption	Epistaxis with fracture	Nasal bone fracture with intranasal mucosal tear
Orbital mucosal involvement	Periorbital ecchymosis + subconjunctival hemorrhage with orbital fracture	Orbital floor fracture with conjunctival tear
Sinus communication	Fracture into a paranasal sinus	Maxillary fracture extending into maxillary sinus — arguable “open”

Key rule: If bone is NOT visible/palpable through skin or mucosa and the overlying tissues are intact, the fracture is closed (A). When in doubt — especially for mandible and maxilla fractures where intraoral mucosal tears are common — query the surgeon for open vs. closed determination. Open fractures carry higher infection risk, may require intravenous antibiotics, and represent a more complex clinical scenario than closed fractures.

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🌳 Code Tree / Hierarchy — S02 Fracture of Skull and Facial Bones

S02 Fracture of Skull and Facial Bones  
│  
├── S02.0xx Fracture of vault of skull  
│  
├── S02.1- Fracture of base of skull  
│ ├── S02.10- Unspecified base of skull  
│ ├── S02.11- Occiput fracture  
│ └── S02.19- Other base of skull  
│  
├── S02.2XXA Fracture of NASAL BONES ← use when nasal confirmed  
│  
├── S02.3XXA Fracture of ORBITAL FLOOR ← use when orbital floor confirmed  
│  
├── S02.4- Malar, maxillary, and zygoma fractures  
│ ├── S02.40- Malar fracture, unspecified  
│ ├── S02.41- Zygomatic fracture (zygoma/cheekbone)  
│ └── S02.42- Fracture of alveolus of maxilla  
│  
├── S02.5- Fracture of tooth (separate category)  
│  
├── S02.6- Fracture of MANDIBLE ← use when mandible confirmed  
│ ├── S02.600A Fracture of unspecified part of mandible, unspecified  
│ ├── S02.61- Fracture of condylar process of mandible  
│ ├── S02.62- Fracture of subcondylar process  
│ ├── S02.63- Fracture of coronoid process  
│ ├── S02.64- Fracture of ramus of mandible  
│ ├── S02.65- Fracture of angle of mandible  
│ ├── S02.66- Fracture of symphysis of mandible  
│ ├── S02.67- Fracture of alveolus of mandible  
│ └── S02.69- Fracture of mandible of other specified site  
│  
├── S02.8- Fractures of other specified skull and facial bones  
│ ├── S02.80- Other specified skull fractures  
│ ├── S02.81- Fracture of orbital roof (separate from floor)  
│ └── S02.82- Fracture of other specified facial bones  
│  
└── S02.9- Fracture of UNSPECIFIED skull and facial bones ← THIS FAMILY  
├── S02.91XA Fracture of skull, unspecified ← use when skull (not face)  
├── S02.92XA Fracture of FACIAL BONE, unspecified ← THIS CODE ✅  
└── S02.91XB / S02.92XB Open fracture variants

Specificity Hierarchy — Always Drill Down

Before assigning S02.92XA, ask these questions in order:

1. Is the nasal bone confirmed? → S02.2XXA (nasal bone fracture — most common facial fracture overall)
2. Is the mandible confirmed? → S02.6XXA (most common fracture requiring ORIF)
3. Is the zygoma/malar confirmed? → S02.41XA (second most common facial fracture requiring surgery)
4. Is the orbital floor confirmed? → S02.3XXA (blowout fracture — ophthalmology involvement)
5. Is the maxilla/Le Fort confirmed? → S02.4XXA
6. None of the above confirmed? → S02.92XA (unspecified — use provisionally, query for specificity)

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📋 Clinical Overview

The Facial Skeleton — Bones at Risk

Understanding which facial bones are most commonly fractured helps the coder know when to query for specificity vs. when S02.92XA is genuinely appropriate:

Facial Bone	Frequency	Typical Mechanism	Specific Code
Nasal bones	Most common	Punch, fall, sports	S02.2XXA
Mandible	2nd most common	High-energy blunt force, assault	S02.6-xA
Zygoma (malar)	3rd most common	Lateral facial blow	S02.41XA
Orbital floor (blowout)	Common	Direct orbital trauma	S02.3XXA
Maxilla / Le Fort	Less common — high energy	MVA, significant trauma	S02.4-xA
Frontal sinus/orbital roof	Uncommon	High-energy, anterior skull base	S02.81XA
Multiple facial bones	Panfacial fracture	MVA, severe assault	Multiple S02.x codes

Le Fort Classification — Coding Note

Le Fort Fractures — High Clinical Complexity

Le Fort fractures are complex midface fracture patterns classified by horizontal level of injury. They are never coded as S02.92XA — they have their own specific code territory in the S02.4x family. Recognizing Le Fort documentation triggers a specificity query:

Le Fort Type	Pattern	Code Territory
Le Fort I	Horizontal — above teeth through maxilla	S02.4-
Le Fort II	Pyramidal — through maxilla, nose, orbital floors	S02.4- + S02.3xx
Le Fort III	Craniofacial dysjunction — complete midfacial separation	Multiple S02.x codes

When “Le Fort” appears in a record and S02.92XA is the current code, always query — this is among the most specific fracture patterns in trauma surgery and has its own distinct code hierarchy.

Closed vs. Open Fracture — Clinical Significance for Coding

Factor	Closed (S02.92XA)	Open (S02.92XB)
Skin/mucosa	Intact over fracture site	Breached — fracture communicates externally
Infection risk	Standard	Significantly elevated — polymicrobial contamination
Antibiotic use	Not routine	IV antibiotics typically required
OR urgency	Elective if surgical	More urgent — open fracture management
Wound codes	May or may not have concurrent wound	Concurrent open wound code (S01.81XA) typically also assigned
DRG impact	Lower baseline complexity	Higher complexity — CC/MCC potential with infection

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🔢 External Cause Coding — Required for Every Injury

External cause codes are mandatory companion codes for S02.92XA under ICD-10-CM Official Coding Guidelines (Section I.C.20).

External Cause Code Structure

Component	Code Series	Purpose	Example
Cause/mechanism	W00-X58, X71-Y09	HOW the fracture occurred	W22.8XXA Struck by object; Y04.0XXA Assault
Place of occurrence	Y92.x	WHERE it happened	Y92.480 Sports/athletic area
Activity	Y93.x	WHAT patient was doing	Y93.89 Other activity
External cause status	Y99.x	Work vs. leisure	Y99.8 Other

Most Common External Cause Codes Paired with S02.92XA

Scenario	External Cause Code
Assault — struck by fist/object	Y04.0XXA — Assault by unarmed brawl or fight
MVA — driver	V49.50XA — Driver in collision
Fall striking face on object	W18.09XA — Fall on/from other surface
Sports — ball striking face	W21.89XA — Struck by other sports equipment
Fall from standing	W18.30XA — Fall on same level NEC
Dog bite with facial fracture	W54.0XXA — Dog bite
Workplace injury	W/X mechanism + Y99.0

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💰 HCC Risk Adjustment (CMS-HCC v28)

Field	Detail
CMS-HCC Model Version	v28
HCC Assignment	❌ Not Mapped
RAF Coefficient	0.000

Injury Code Not HCC-Mapped — Comorbidity Context Matters

S02.92XA carries no RAF weight. However, the mechanism of a facial fracture often surfaces high-value HCC opportunities:

Context	HCC Opportunity
Fall in elderly patient	M81.0 Osteoporosis (HCC not mapped but supports further HCC-bearing diagnoses)
Assault + documented alcohol intoxication	F10.x Alcohol use disorder HCC 56
MVA + TBI	S06.x intracranial injury codes — evaluate severity
Elderly patient on anticoagulation	Z79.01 — document anticoagulant use; affects treatment planning
Recurrent falls + dementia	F02.x or F03.x Dementia HCC 52

In a Medicare Advantage patient, every qualifying comorbidity documented at the facial fracture encounter meets UHDDS criteria and should be captured as an additional diagnosis.

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🏥 MS-DRG Assignment

MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat

Surgical Partition (When Operative Repair Performed)

DRG	Title	Est. Relative Weight*
DRG 133	Other ENT OR Procedures with MCC	~3.20-3.80
DRG 134	Other ENT OR Procedures with CC	~1.80-2.20
DRG 135	Other ENT OR Procedures without CC/MCC	~1.10-1.40

Medical Partition (Non-Operative Management)

DRG	Title	Est. Relative Weight*
DRG 154	Other ENT Diagnoses with MCC	~2.20-2.80
DRG 155	Other ENT Diagnoses with CC	~1.10-1.40
DRG 156	Other ENT Diagnoses without CC/MCC	~0.60-0.80

*Approximate. Verify against IPPS FY2026 Final Rule tables.

Surgical vs. Medical Partition — OR Procedure Drives the Split

The key DRG partitioning question for S02.92XA admissions is whether an OR-level procedure is performed:

• ORIF of facial fracture (ICD-10-PCS open/percutaneous reduction with internal fixation) → Surgical partition (DRG 133-135)
• Closed reduction with or without fixation performed in the OR → Verify whether this meets OR-level procedure definition in the FY2026 grouper
• Non-operative management (observation, splinting, no OR) → Medical partition (DRG 154-156)

CC/MCC documentation is critical for either partition. Facial fracture admissions that route to DRG 135 or 156 (no CC/MCC) should be reviewed for:

• Concurrent TBI (S06.x)
• Open fracture complications
• Orbital involvement (S05.x)
• Concurrent open wound (S01.x)
• Significant pain requiring IV management
• Concurrent systemic comorbidities

Concurrent TBI — Always Evaluate at Every Facial Fracture

Facial fractures from high-energy mechanisms (MVA, assault, falls) frequently accompany traumatic brain injury — concussion (S06.0XXA), contusion (S06.3XXA), subdural hematoma (S06.4XXA), or diffuse axonal injury (S06.2XXA). A concurrent intracranial injury code may significantly alter MDC assignment, DRG grouping, and CC/MCC status. Always review the record for any documented alteration or loss of consciousness, GCS score, CT head findings, and neurology consult — these may be more clinically significant than the facial fracture itself and may drive principal diagnosis.

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🔗 Related ICD-10-CM Codes

S02.9X — Unspecified Skull and Facial Bone Fracture Family

Code	Description
S02.91XA	Fracture of skull, unspecified, initial — closed
S02.91XB	Fracture of skull, unspecified, initial — open
S02.92XA	Fracture of facial bone, unspecified, initial — closed ← This Code
S02.92XB	Fracture of facial bone, unspecified, initial — open
S02.92XD	Fracture of facial bone, unspecified — subsequent, routine healing
S02.92XG	Fracture of facial bone, unspecified — subsequent, delayed healing
S02.92XK	Fracture of facial bone, unspecified — subsequent, nonunion
S02.92XS	Fracture of facial bone, unspecified — sequela

More Specific Facial Bone Fracture Codes — Use Before S02.92XA

Code	Facial Bone	7th Char Available	CIC Note
S02.2XXA	Nasal bones	A/B/D/G/K/S	Most common facial fracture
S02.3XXA	Orbital floor	A/B/D/G/K/S	Blowout fracture — ophthalmology
S02.40XA	Malar, unspecified	A/B/D/G/K/S	Cheekbone
S02.41XA	Zygoma	A/B/D/G/K/S	Lateral face — tripod fracture
S02.42XA	Alveolus of maxilla	A/B/D/G/K/S	Tooth-bearing segment
S02.600A	Mandible, unspecified	A/B/D/G/K/S	Most common requiring ORIF
S02.61XA	Condylar process, mandible	A/B/D/G/K/S	TMJ involvement
S02.81xA	Orbital roof	A/B/D/G/K/S	Frontal sinus/anterior skull base

Concurrent Injury Codes — Frequently Coded with S02.92XA

Code	Description	Relationship
S01.81XA	Open wound of other part of head, initial	Concurrent skin laceration overlying fracture
S06.0X0A	Concussion without LOC, initial	TBI — evaluate with every high-energy facial fracture
S06.4X0A	Epidural hemorrhage, initial	Severe concurrent TBI — may become principal dx
S05.10XA	Contusion of eyeball/orbital tissues, initial	Orbital involvement with blowout-type fracture
S09.90XA	Unspecified head injury, initial	Concurrent head injury NOS
M26.x	Malocclusion	Mandible/maxilla fractures disrupting dental occlusion

Sequela Codes — Post-Healing

Code	Description
S02.92XS	Fracture of facial bone, sequela (always additional; sequela condition sequences first)
M26.20	Unspecified abnormality of dental arch relationship — malocclusion as sequela
G50.0	Trigeminal neuralgia — facial nerve sequela
H05.x	Enophthalmos — orbital volume change as sequela of blowout fracture
L90.5	Scar conditions — overlying skin involvement

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🛠️ CPT Procedural Crosswalk

Facial Fracture Repair — Primary Selection Table

CPT code selection for facial fracture repair depends on:

1. Specific bone (mandible, zygoma, nasal, orbital, maxilla)
2. Technique (closed reduction vs. open reduction with/without internal fixation)
3. Complexity (simple vs. comminuted/compound)

Nasal Bone Fractures — S02.2xx

CPT	Description	wRVU	Global
21310	Closed treatment of nasal bone fracture, without manipulation	2.16	10 days
21315	Closed treatment of nasal bone fracture, with stabilization	3.84	10 days
21320	Closed treatment of nasal bone fracture, with manipulation	4.81	90 days
21325	Open treatment of nasal fracture; uncomplicated	7.39	90 days
21330	Open treatment of nasal fracture; complicated, w/ internal/external fixation	10.75	90 days
21335	Open treatment of nasal fracture; with concomitant open treatment of fractured septum	14.36	90 days

Mandibular Fractures — S02.6xx

CPT	Description	wRVU	Global
21451	Closed treatment of mandibular fracture; without manipulation	5.22	90 days
21452	Closed treatment of mandibular fracture; with manipulation	7.89	90 days
21453	Closed treatment of mandibular fracture; with interdental fixation	10.54	90 days
21461	Open treatment of mandibular fracture; without fixation	12.30	90 days
21462	Open treatment of mandibular fracture; with intermaxillary fixation	15.47	90 days
21465	Open treatment of mandibular condylar fracture	16.88	90 days
21470	Open treatment of complicated mandibular fracture, including internal fixation, multiple osteotomies	22.60	90 days

Zygomatic/Malar Fractures — S02.41x

CPT	Description	wRVU	Global
21355	Closed treatment of zygomatic arch fracture	5.80	90 days
21356	Open treatment of depressed zygomatic arch fracture	10.34	90 days
21360	Open treatment of depressed malar fracture	12.72	90 days
21365	Open treatment of complicated malar fracture, including zygomatic arch and malar tripod	19.26	90 days
21366	Open treatment of complicated malar fracture with bone grafting	24.38	90 days

Orbital Floor (Blowout) Fractures — S02.3xx

CPT	Description	wRVU	Global
21385	Open treatment of orbital floor blowout fracture; periorbital (transorbital) approach	14.40	90 days
21386	Open treatment of orbital floor blowout fracture; periorbital approach with alloplastic or other implant	16.55	90 days
21387	Open treatment of orbital floor blowout fracture; combined approach	18.72	90 days
21390	Open treatment of orbital floor blowout fracture; periorbital approach, with alloplastic or other implant, with repair of walls of maxillary sinus	21.88	90 days
21395	Open treatment of orbital floor blowout fracture; periorbital approach with bone graft	23.41	90 days

Orbital Floor Fracture — Ophthalmology Coding Interface

When an orbital floor fracture (S02.3XXA) is present, concurrent ocular injury codes must be evaluated:

• S05.10XA — Contusion of eyeball and orbital tissues
• H50.x — Strabismus / extraocular muscle entrapment
• H53.x — Diplopia (double vision) — evaluate with every orbital fracture

Enophthalmos (globe retraction from expanded orbital volume) may develop weeks post-injury — code as sequela H05.40x when it develops and document the causal link to the fracture. When S02.92XA is used and orbital involvement is suspected but not confirmed, query for orbital floor vs. other facial bone — this distinction has significant CPT and specialty consultation implications.

Global Period Warning — Facial Fracture Repairs

90-Day Global Period — Most Facial Fracture OR Repairs

The majority of open facial fracture repair CPT codes (21325-21470, 21356-21395) carry a 90-day global period. During this period:

• All routine follow-up care is included in the surgical fee
• Separate E/M services for routine fracture management are NOT separately billable to the surgeon within the global period
• Modifier -24 is required for unrelated E/M services during the global period
• Modifier -79 is required for unrelated procedures during the global period
• Complications requiring return to OR during the global period use modifier -78

The ICD-10-CM 7th character at each follow-up visit must accurately reflect the healing status — routine healing during the 90-day global period → D; documented healing delay → G; nonunion requiring revision → K (and modifier -78 if returning to OR).

Imaging CPT Codes

CPT	Description	wRVU	Application
70486	CT maxillofacial without contrast	0.86	Gold standard for facial fracture characterization — specific bone identification
70487	CT maxillofacial with contrast	0.86	Soft tissue injury assessment alongside fracture
70488	CT maxillofacial with and without contrast	0.86	Comprehensive evaluation — vascular/soft tissue + bone
73521	X-ray facial bones, complete	0.28	Less sensitive than CT — rarely adequate for surgical planning

CT Facial is the Specificity Driver

In almost every facial fracture presentation, a CT maxillofacial (70486) will confirm the specific fractured bone(s) — making S02.92XA appropriate only before CT results are available. Once the CT report identifies a specific bone (nasal, mandible, zygoma, orbital floor, etc.), the coder must update the diagnosis code to the specific facial bone fracture code. S02.92XA should virtually never survive as the final code on a record where CT maxillofacial was obtained and read — the CT result obligates code specificity.

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🔬 ICD-10-PCS Crosswalk (Inpatient)

Closed Reduction — No Internal Fixation

PCS	Section	Body System	Root Op	Body Part	Approach	Note
0NSB0ZZ	0 Med/Surg	N Head/Facial	S Reposition	B Nasal bone	0 Open	Nasal fracture, closed reduction
0NS0XZZ	0 Med/Surg	N Head/Facial	S Reposition	0 Skull	X External	Closed manipulation

Open Reduction with Internal Fixation (ORIF)

PCS	Section	Body System	Root Op	Body Part	Approach	Device	Note
0NSB04Z	0 Med/Surg	N Head/Facial	S Reposition	B Nasal bone	0 Open	4 Internal fixation	Nasal ORIF
0NS604Z	0 Med/Surg	N Head/Facial	S Reposition	6 Mandible, right	0 Open	4 Internal fixation	Mandible ORIF right
0NS704Z	0 Med/Surg	N Head/Facial	S Reposition	7 Mandible, left	0 Open	4 Internal fixation	Mandible ORIF left
0NSR04Z	0 Med/Surg	N Head/Facial	S Reposition	R Zygomatic bone, right	0 Open	4 Internal fixation	Zygoma ORIF right
0NSS04Z	0 Med/Surg	N Head/Facial	S Reposition	S Zygomatic bone, left	0 Open	4 Internal fixation	Zygoma ORIF left

PCS Body Part Specificity Drives Code Selection

ICD-10-PCS facial bone body part characters include right and left laterality for zygoma, mandible, and orbit — reinforcing why code specificity matters on the diagnosis side as well. When S02.92XA is used inpatient and ORIF is performed, the PCS code will inherently specify the bone and laterality through its body part character — creating a documentation inconsistency if the diagnosis code remains at the unspecified S02.92XA level. CDI should ensure ICD-10-CM and ICD-10-PCS body part specificity align in the final coded record.

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💊 Coding Scenarios and Examples

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Scenario 1 — ED Triage, Pre-CT Imaging (Provisional Code Use)

Clinical Vignette: A 24-year-old male presents to the ED after an altercation. He has significant left facial swelling, tenderness over the left cheek and jaw, and mild trismus. The ED physician orders CT maxillofacial. At triage/initial assessment, the nurse documents “facial fracture, suspected” and the ED physician’s initial note reads “facial fracture — CT pending.”

Initial Code Assignment (Pre-CT):

• S02.92XA — Unspecified fracture of facial bone, initial encounter for closed fracture (appropriate provisional code — specific bone not yet identified pending CT results)
• Y04.0XXA — Assault by unarmed brawl or fight (external cause)
• Y92.89 — Other specified place of occurrence

After CT Results Confirmed (Left Zygoma + Left Mandible Body):

• ❌ Retire S02.92XA
• ✅ S02.41xA — Fracture of zygoma, initial encounter, closed (left zygoma — add laterality subcharacter from FY2026 tabular)
• ✅ S02.641A — Fracture of body of left mandible, initial encounter (left mandible body — confirmed on CT)

Never Leave S02.92XA as the Final Code When CT Is Available

S02.92XA is a provisional/triage code. When CT maxillofacial confirms specific bone(s), the code MUST be updated to reflect the confirmed specific fracture. Submitting a claim with S02.92XA when CT results are in the record identifying specific bones is a coding accuracy failure. Most facilities should have a CDI or charge reconciliation workflow ensuring specificity is applied once imaging is finalized. In the inpatient setting, S02.92XA should never appear on a discharge claim if CT was performed during the admission.

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Scenario 2 — Open Facial Fracture — Mandible with Intraoral Laceration (Inpatient)

Clinical Vignette: A 41-year-old female is admitted following an MVA. CT maxillofacial confirms bilateral mandible fractures (angle right, body left). Intraoral exam by oral surgery reveals gingival lacerations overlying both fracture sites — bone visible intraorally at the right angle. Oral surgery documents “open bilateral mandible fractures — bone exposed intraorally bilaterally.” ORIF performed on day 1 — bilateral mandible ORIF with titanium plate fixation. IV amoxicillin/clavulanate started for open fracture prophylaxis.

Principal Diagnosis:

• S02.61XB — Fracture of condylar process of right mandible, initial encounter for open fracture (or applicable angle/body code — 7th character B because intraoral mucosal breach documented; verify specific subcode from FY2026 tabular for right angle)

Wait — let’s use the correct subcodes:

• S02.651B — Fracture of angle of right mandible, initial encounter for open fracture (right angle — 7th char B — open)
• S02.641B — Fracture of body of left mandible, initial encounter for open fracture (left body — 7th char B — open)

Additional Diagnoses:

• V49.50XA — Passenger in car, collision (external cause)
• S01.81XA — Open wound of other part of head, initial encounter (concurrent intraoral lacerations — separately codeable)

ICD-10-PCS:

• 0NS604Z — Reposition, mandible right, open, internal fixation device
• 0NS704Z — Reposition, mandible left, open, internal fixation device

Intraoral Mucosal Tear = Open Fracture = 7th Character B

This scenario illustrates the facial fracture “open” standard. The fracture is classified as open (7th char B) because bone is visible through gingival lacerations — the fracture communicates with the oral cavity. This is NOT coded as S02.92XA (unspecified) because CT confirmed specific bones AND the open nature is documented. The 7th character B also explains the IV antibiotic use, which aligns clinical documentation with the coding and supports medical necessity for the antibiotic administration.

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Scenario 3 — Subsequent Encounter, Routine Healing (Follow-Up Visit)

Clinical Vignette: The patient from Scenario 1 (left zygoma + left mandible fractures) returns to the oral surgery clinic 6 weeks post-ORIF. CT shows good callus formation, plate and screws in good position, occlusion intact. Surgeon documents “fractures healing well — routine follow-up.”****

Diagnosis Codes:

• S02.41XD — Fracture of zygoma, subsequent encounter, routine healing (7th char D — healing normally; active treatment complete)
• S02.641D — Fracture of body of left mandible, subsequent encounter, routine healing

Transition from A → D Is Triggered by Completion of Active Treatment

The 7th character transitions from A (initial/active) to D (subsequent/routine healing) when active treatment is complete and the patient is in the monitored healing phase. For a mandible ORIF, this transition typically occurs after the OR — the immediate post-op period may still be A if wound/hardware management is still active, but routine 6-week follow-up is unambiguously D. The global period of the CPT code (90 days for most facial ORIF) runs concurrently — but the ICD-10-CM 7th character follows clinical healing status, not the CPT global period clock.

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Scenario 4 — Subsequent Encounter, Nonunion — Return to OR (Inpatient)

Clinical Vignette: A 38-year-old male with a prior right mandible fracture ORIF 4 months ago presents for follow-up. CT shows failure of bony union at the right mandible angle fracture site — “pseudarthrosis/nonunion confirmed.” He is admitted for hardware removal and bone grafting.

Principal Diagnosis:

• S02.651K — Fracture of angle of right mandible, subsequent encounter for nonunion (7th char K — documented nonunion; active surgical intervention required)

Additional Diagnoses:

• Z96.691 — Presence of other orthopedic joint implant (prior hardware in situ)

ICD-10-PCS:

• Bone grafting PCS code — Section 0, Head/Facial Bones, Supplement or Replacement root operation with autologous/synthetic graft qualifier
• Hardware removal PCS code — Removal root operation, facial bone

CPT (if outpatient):

• 21470 — Open treatment of complicated mandibular fracture with internal fixation, multiple osteotomies (revision/nonunion repair)
• Modifier -78 — Return to OR for complication during global period (if within the 90-day global period of the original repair)

Nonunion = 7th Character K — Not D and Not a New Fracture

K (nonunion) is one of the most clinically and coding-significant distinctions in all of fracture coding. Common errors:

• ❌ Coding nonunion as D (routine healing) — completely misrepresents the clinical situation; nonunion requires active surgical management, not routine monitoring
• ❌ Coding nonunion as a new fracture (7th char A) — nonunion is a complication of the original fracture, not a new event; the original fracture code with 7th char K is correct
• ✅ K = nonunion — use when physician explicitly documents “nonunion,” “pseudarthrosis,” “failed to heal,” or “no bony bridging” after the expected healing timeframe

The same logic applies to G (delayed healing) — document “delayed healing” or “delayed union” in the physician note before assigning G; never assume delayed healing without documentation.

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Scenario 5 — Sequela Encounter — Malocclusion After Healed Mandible Fracture

Clinical Vignette: A patient presents to an oral surgeon 11 months after a mandible fracture that healed with a slight step deformity. The oral surgeon documents: “Malocclusion — sequela of prior mandible fracture with malunion. Anterior open bite on clinical exam.”

Diagnosis Codes:

• M26.20 — Unspecified abnormality of dental arch relationship (malocclusion — the sequela condition — sequences FIRST)
• S02.92XS — Fracture of facial bone, unspecified, sequela (or more specific S02.6xxS if bone was documented — identifies the original fracture as the cause; always additional, never principal)

Sequela Sequencing — Exact Same Rule as S01.81XS

The sequela sequencing rule from S01.81XA applies identically here: the new condition (malocclusion) sequences FIRST; the fracture code with 7th char S is always additional. This is explicitly stated in ICD-10-CM Official Coding Guidelines (Section I.C.19.a):

“The sequela is sequenced first, followed by the injury code with the 7th character ‘S’.”

Common facial fracture sequelae that follow this same pattern:

Sequela Condition	Code	Sequences Before S02.92XS
Malocclusion	M26.20	✅ First
Trigeminal neuralgia	G50.0	✅ First
Enophthalmos	H05.40x	✅ First
Scar/fibrosis	L90.5	✅ First
Facial asymmetry/deformity	M95.0	✅ First
Chronic facial pain	G89.28	✅ First
Hardware failure/pain	T84.x	✅ First

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⚠️ Coding Pitfalls and Tips

	Pitfall or Tip
❌	Never omit the X placeholder — S02.92A (without X) places A in position 6; structurally invalid; claim rejects; the placeholder X is non-negotiable
❌	Never submit S02.92X without the 7th character — 6-character code is incomplete and will reject
❌	Do not leave S02.92XA as the final code when CT confirms a specific bone — CT maxillofacial is obtained for virtually every admitted facial fracture; once specific bone is identified, a specific S02.x code must replace S02.92XA
❌	Do not use 7th char D for all subsequent encounters — interrogate every follow-up for healing status; physician documentation of delayed healing → G; nonunion → K; failing to distinguish D/G/K is a coding accuracy failure
❌	Do not code nonunion as a new fracture (7th char A) — nonunion is a complication of the original injury, coded as 7th char K on the original fracture code; a new traumatic fracture at the same site would require query
❌	Do not sequence S02.92XS first in sequela encounters — the sequela condition (malocclusion, nerve damage, deformity) always sequences first; S02.92XS is always additional
❌	Do not assume all facial fractures are closed (7th char A) — check for mucosal tears, intraoral lacerations, and bone-through-skin; mandible and maxilla fractures with intraoral mucosal disruption may qualify as open (7th char B)
❌	Do not miss concurrent TBI — high-energy facial fractures are frequently associated with concussion, contusion, or intracranial hemorrhage; always review for documented LOC, GCS change, CT head findings, and neurology consult
✅	S02.92XA is provisional — CTgrades it — treat S02.92XA as a placeholder pending imaging; once CT facial bones is resulted, upgrade to the specific fracture code
✅	Fractures have 6 seventh characters — memorize A/B/D/G/K/S — this is a CIC exam staple; wound codes have 3 (A/D/S); fracture codes have 6 (A/B/D/G/K/S); know the difference cold
✅	The X placeholder rule is identical to S01.81XA — same structural rule, different content; reinforce the rule with both examples in your study notes
✅	Open fracture (B) = mucosal OR skin communication — for facial fractures specifically, intraoral mucosal tears qualify as open; don’t apply only the “bone through skin” standard from long bone fractures
✅	90-day global period applies to most facial ORIF codes — modifier -24 (unrelated E/M), -78 (return to OR, related), -79 (unrelated procedure) during global period; K (nonunion) return to OR = modifier -78 if within global period
✅	CT maxillofacial drives code specificity — always review theradiology report — the radiologist’s confirmed description of specific fractured bones (nasal, zygoma, mandible, orbital floor, maxilla) obligates the coder to assign the specific S02.x code; S02.92XA surviving as the final code on a CT-confirmed record isa documentation and coding accuracy failure
✅	Code concurrent open wound separately when present — a skin or mucosal laceration overlying a facial fracture is separately codeable (S01.81XA or site-specific S01.x); the fracture code and the wound code are not mutually exclusive; code both when both are documented
✅	Orbital floor fracture = ophthalmology interface — when CT confirms orbital floor involvement, evaluate for diplopia (H53.2x), enophthalmos (H05.40x), extraocular muscle entrapment (H50.x), and concurrent globe injury (S05.x); these are separately codeable and may affect DRG tier
✅	Antibiotic use supports open fracture coding — IV antibiotic administration documented for fracture infection prophylaxis is a clinical indicator that the treating physician is managing an open fracture; aligns with 7th char B and supports medical necessity documentation
✅	In polytrauma, facial fracture is rarely the principal diagnosis — concurrent TBI (S06.x), cervical spine injury (S12.x), or thoracic trauma may be more severe and drive principal diagnosis selection per OG Section II; sequence the injury most responsible for the admission after study
✅	Hardware/plate complications after ORIF = T84.x, not S02.x — broken or displaced internal fixation hardware is coded from the T84 (complications of internal fixation devices) family, not as a new fracture; the sequela fracture code S02.x with 7th char S or K may be coded alongside T84.x depending on clinical context

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📚 Sources

1. CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting, FY2026. Chapter 19 Coding Guidelines (Section I.C.19): fracture 7th character A/B/D/G/K/S definitions and application; open vs. closed fracture determination; initial vs. subsequent vs. sequela encounter; sequela sequencing rules; placeholder X structural requirement; principal diagnosis selection in trauma (Section II.B); external cause code guidelines (Section I.C.20); coding to the highest degree of specificity (Section I.B.3).

2. CMS/NCHS. ICD-10-CM Tabular List FY2026. S02 — Fracture of Skull and Facial Bones; S02.9 — Fracture of Unspecified Skull and Facial Bones; S02.92XA-S02.92XS billable code entries and 7th character options; Use Additional Code instructions for external cause codes; Excludes1 notations for specific facial bone fracture codes; placeholder X structural requirement at S02.92 level.

3. American Medical Association (AMA). CPT 2026 Professional Edition. Musculoskeletal System — Skull, Facial Bones, and Temporomandibular Joint: Nasal fractures (21310-21335); Mandible fractures (21451-21470); Zygoma/malar fractures (21355-21366); Orbital floor fractures (21385-21395); Maxillary fractures (21421-21432); CPT guidelines for fracture treatment complexity, closed vs. open reduction definitions, and global period structure.

4. CMS. Physician Fee Schedule Final Rule FY2026. wRVU values for facial fracture repair CPT codes 21310-21470; 90-day global period confirmation for major facial fracture ORIF procedures; modifier -24, -78, -79 guidance during global period; modifier -25 for same-day E/M and fracture management.

5. CMS. National Correct Coding Initiative (NCCI) Policy Manual for Medicare Services, current version. Musculoskeletal Surgery chapter — fracture treatment bundling rules; imaging and fracture management on same DOS; E/M + fracture procedure modifier -25 requirements; bilateral facial fracture procedure billing rules.

6. CMS. IPPS Final Rule FY2026 — MS-DRG Definitions Manual v43. MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat; DRGs 133-135 (surgical partition) and DRGs 154-156 (medical partition); OR procedure determination for facial fracture DRG routing; CC/MCC impact on tier assignment; concurrent TBI and MDC assignment interaction.

7. CMS. ICD-10-PCS Reference Manual FY2026. Section 0 (Medical & Surgical), Body System N (Head and Facial Bones) — Reposition root operation (S) for fracture reduction; body part characters for nasal bone (B), mandible right (6), mandible left (7), zygoma right (R), zygoma left (S), orbital bone (C/D); device character 4 (internal fixation) vs. Z (no device) for closed reduction; approach character 0 (open) for ORIF vs. X (external) for closed manipulation.

8. Ellis E, Zide MF. Surgical Approaches to the Facial Skeleton. 3rd ed. Wolters Kluwer; 2019. Facial fracture classification systems — Le Fort types, mandible fracture zones, zygomatic tripod fractures, orbital blowout patterns; open vs. closed fracture determination in the facial skeleton context.

9. Kellman RM, Losquadro WD. “Comprehensive Review of Frontal Sinus Fractures.” Facial Plastic Surgery. 2009;25(3):188-97. Frontal sinus/skull base fracture coding interface with S02.8x family.

10. AAPC. ICD-10-CM Professional Coding Manual FY2026. Chapter 19 injury coding guidelines — fracture 7th character rules; placeholder X; open vs. closed fracture standards including facial mucosal communication; nonunion vs. malunion vs. delayed healing distinction; sequela coding rules; external cause code requirements and sequencing for trauma encounters.

11. Buck CJ. Step-by-Step Medical Coding, 2026 Edition. Chapter on Musculoskeletal Injury Codes — facial fracture hierarchy, S02.x specificity ladder, fracture 7th character A/B/D/G/K/S applied examples; CPT fracture repair code selection tables (closed vs. open reduction, bone-specific code families).