Crystal's Coder Hub🧬 ICD-10 CM S02.600A — Fracture Of Unspecified Part Of Body Of Mandible, Unspecified Side, Initial Encounter For Closed Fracture
Billable Code Confirmed
ICD-10 CM S02.600A is a valid, billable 7-character ICD-10-CM code for FY2026. The 7th character
Aspecifies that this is the initial encounter for active treatment of a closed fracture. No additional characters are required.
Non-Billable Parent Codes — Never Submit These
- ❌
S02.600— 6-character header — missing the 7th character encounter and fracture type designator (A, B, D, G, K, S).- ❌
S02.60— 5-character header — missing anatomic site specificity and 7th character.Always submit S02.600A (all 7 characters) when an unspecified side closed mandibular body fracture is documented with active treatment/initial encounter.
Clinical Context: Unspecified Laterality Risk
ICD-10-CM S02.600A captures a closed fracture of the mandibular body where the side (right vs. left) is not specified. Because the mandible has distinct right and left bodies, submitting an “unspecified side” code often triggers payer denials or clinical documentation integrity (CDI) queries. Whenever possible, query the provider to document the specific side to support S02.601A (right) or S02.602A (left).
Code Classification
ICD-10 CM Diagnosis Code — wRVU, assistant payable, and global period fields are not applicable to diagnosis codes; see the Commonly Associated CPT Codes and ICD-10-PCS Crosswalk sections for procedural equivalents.
🔍 Code Description
ICD-10 CM S02.600A classifies Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture. This diagnosis code represents the initial phase of care (active treatment, such as emergency evaluation or surgical reduction) for a break in the body of the lower jaw bone, without an open wound communicating with the fracture, where the specific side of the body is not documented.
The mandibular body is the horizontal portion of the lower jaw that holds the lower teeth. Fractures here often result from blunt force trauma, motor vehicle collisions, or falls. A “closed” fracture means the bone is broken but has not punctured the overlying skin or oral mucosa. The 7th character “A” indicates the patient is receiving active, initial treatment (e.g., surgical evaluation, wiring, plating, or stabilization).
🌳 Code Tree / Hierarchy
S02 Fracture of skull and facial bones ❌ Non-billable
│
├── S02.4 Fracture of malar, maxillary and zygomatic bones ❌ Non-billable
├── S02.6 Fracture of mandible ❌ Non-billable
│ │
│ ├── S02.60 Fracture of unspecified part of body of mandible and unspecified fracture of mandible ❌ Non-billable
│ │ │
│ │ ├── S02.600 Fracture of unspecified part of body of mandible, unspecified side ❌ Non-billable
│ │ │ │
│ │ │ ├── S02.600A Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture ◀ THIS CODE ✅ Billable
│ │ │ └── S02.600B Fracture of unspecified part of body of mandible, unspecified side, initial encounter for open fracture ✅ Billable
│ │ │
│ │ ├── S02.601 Fracture of unspecified part of body of right mandible ❌ Non-billable
│ │ └── S02.602 Fracture of unspecified part of body of left mandible ❌ Non-billable
│ │
│ └── S02.61 Fracture of condylar process of mandible ❌ Non-billable
│
└── S02.8 Other fractures of skull and facial bones ❌ Non-billable
Specificity Insight
Payers heavily scrutinize unspecified laterality codes for traumatic injuries. If the clinical note mentions “right” or “left” anywhere in the radiology report or physical exam, use the corresponding laterality code. Use S02.600A only as a last resort when the side cannot be determined prior to billing.
✅ Includes
The following clinical terms and scenarios map to S02.600A when documented:
- Closed fracture of the body of the mandible, side not specified
- Mandibular body fracture, initial encounter
- Broken jaw (body region) receiving active treatment
- Non-displaced or displaced mandibular body fracture without mucosal or skin breach
❌ Excludes
Excludes 1 — Cannot Be Coded Simultaneously with S02.600A
| Code | Description | Note |
|---|---|---|
| S02.92XA | Unspecified fracture of facial bones, initial encounter for closed fracture | Mutually exclusive. Code S02.600A provides greater anatomic specificity for a facial bone fracture and overrides the unspecified facial bone code. |
Excludes 1 Violation Risk
Never report an unspecified facial bone fracture code alongside a specific mandibular fracture code for the same injury.
Excludes 2 — May Be Coded in Addition if Separately Present
| Code | Description | Note |
|---|---|---|
| S06.9X0A | Unspecified intracranial injury without loss of consciousness, initial encounter | Code both if the patient sustained an intracranial injury alongside the mandibular fracture. |
| S12.9XXA | Fracture of neck, unspecified, initial encounter | Code both if the trauma mechanism also resulted in a cervical spine fracture. |
📋 Clinical Overview
Open vs. Closed Fracture Distinction
Accurate fracture coding relies heavily on whether the fracture is open or closed, which dictates the 7th character.
| Feature | S02.600A — Closed | S02.600B — Open |
|---|---|---|
| Skin/Mucosa | Intact. The bone does not break the surface. | Compromised. The bone pierces the skin or oral mucosa. |
| Infection Risk | Lower; minimal environmental exposure. | High; oral bacteria can directly enter the fracture site. |
| 7th Character | A | B |
Coding Alert — Open vs. Closed Default
If the medical record does not specify whether a fracture is open or closed, ICD-10-CM guidelines dictate that it should be coded as closed. However, mandibular body fractures frequently breach the oral mucosa due to the thin tissue over the alveolar ridge; if the note mentions “mucosal laceration over the fracture site,” it must be coded as an open fracture (7th character B).
Common Diagnoses / Clinical Indications
Patients presenting with a mandibular body fracture typically demonstrate the following signs and symptoms:
- malocclusion: The teeth do not align properly when the mouth is closed.
- Trismus: Inability to fully open the mouth due to pain or structural compromise.
- Facial Asymmetry: Visible swelling or deformity along the lower jaw line.
- Paresthesia: Numbness of the lower lip or chin due to compression or injury of the inferior alveolar nerve.
Coding Manifestations
The fracture code (S02.600A) is the primary diagnosis. You do not need to separately code symptoms like malocclusion or trismus if they are routine manifestations of the acute fracture itself.
💰 HCC Risk Adjustment (CMS-HCC v28)
| Field | Detail |
|---|---|
| CMS-HCC Model Version | v28 (2024-2025 Implementation) |
| HCC Assignment | ❌ Not HCC-Mapped |
| HCC Category | N/A |
| RAF Coefficient | N/A |
CPT S02.600A does not map to an HCC under v28. Acute fractures of the facial bones are considered short-term, resolving conditions and do not typically carry long-term risk adjustment weight unless they result in permanent sequelae.
🏥 DRG Assignment
MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat
| DRG | Title | Est. Relative Weight* |
|---|---|---|
| DRG 157 | Dental and Oral Diseases with MCC | ~1.45 - 1.55 |
| DRG 158 | Dental and Oral Diseases with CC | ~0.95 - 1.05 |
| DRG 159 | Dental and Oral Diseases without CC/MCC | ~0.65 - 0.75 |
Approximate. Verify against IPPS FY2026 Final Rule tables.
Sequencing and Complications
When a patient is admitted primarily for the surgical repair of a mandibular fracture, S02.600A will sequence as the principal diagnosis. When admitted for a different primary trauma (e.g., intracranial hemorrhage), S02.600A sequenced as a secondary diagnosis acts as a Complication or Comorbidity (CC), potentially increasing the DRG weight and hospital reimbursement.
🔗 Related ICD-10-CM Codes
Laterality Variants
| Code | Description |
|---|---|
| S02.600A | Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture ← This Code |
| S02.601A | Fracture of unspecified part of body of right mandible, initial encounter for closed fracture |
| S02.602A | Fracture of unspecified part of body of left mandible, initial encounter for closed fracture |
Encounter and Healing Variants
| Code | Description |
|---|---|
| S02.600D | Fracture of unspecified part of body of mandible, unspecified side, subsequent encounter for fracture with routine healing |
| S02.600G | Fracture of unspecified part of body of mandible, unspecified side, subsequent encounter for fracture with delayed healing |
| S02.600S | Fracture of unspecified part of body of mandible, unspecified side, sequela |
🛠️ Commonly Associated CPT Codes (Oral & Maxillofacial / Trauma)
Outpatient and Profee Setting Context
Treatment of mandibular fractures often involves either closed manipulation or open surgical repair with internal fixation. The CPT code chosen depends on the approach and whether interdental fixation (wiring the jaws together) is required.
| CPT Code | Description | Profee Coding Notes (Modifier 26) |
|---|---|---|
| 21450 | Closed treatment of mandibular fracture; without manipulation | Used when the fracture requires only observation or soft diet instruction; carries a 90-day global period. |
| 21453 | Closed treatment of mandibular fracture with interdental fixation | Involves applying arch bars or wires to stabilize the jaw closed. |
| 21461 | Open treatment of mandibular fracture; without interdental fixation | The surgeon makes an incision (oral or external) to expose and plate the fracture. |
| 21462 | Open treatment of mandibular fracture; with interdental fixation | Open reduction internal fixation (ORIF) combined with wiring the jaws together. |
NCCI Bundling Considerations
- Modifier -57 (Decision for Surgery): If the initial ED or office E/M visit results in the decision to perform major surgery (90-day global) on the same or next day, append modifier -57 to the E/M code to prevent it from being bundled into the surgical package.
🔬 ICD-10-PCS Crosswalk (Inpatient Procedures)
When S02.600A is an inpatient diagnosis, these PCS codes are relevant for associated inpatient procedures.
| PCS Section | Body System | Root Operation | Clinical Application |
|---|---|---|---|
| 0 (Medical and Surgical) | N (Head and Facial Bones) | S (Reposition) | Moving the fractured mandibular bone back to its normal anatomic location. Example: 0NSV04Z (Reposition Mandible with Internal Fixation Device, Open Approach). |
| 0 (Medical and Surgical) | N (Head and Facial Bones) | S (Reposition) | Example: 0NSV3ZZ (Reposition Mandible, Percutaneous Approach). |
💊 Coding Scenarios and Examples
Scenario 1 — ED / Outpatient Hospital: Initial Trauma Evaluation
Clinical Vignette: A 24-year-old male presents to the ED after being struck in the jaw during an altercation. He complains of jaw pain and inability to bite down normally. A maxillofacial CT scan reveals a non-displaced fracture of the mandibular body. The side is inadvertently omitted from the radiologist’s impression and the ED provider’s note. The oral surgeon on call evaluates the patient, confirms a closed fracture, and determines surgery is not currently required. The patient is placed on a soft diet and instructed to follow up in 1 week.
Principal Diagnosis:
- S02.600A — Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture (Diagnosis code matches the lack of laterality in the clinical documentation, though a query would be ideal).
CPT / HCPCS (Profee):
- 21450 — Closed treatment of mandibular fracture; without manipulation
- 99284-57 — Emergency department visit, moderate complexity. (Modifier -57 added because the surgical treatment 21450 carries a 90-day global period and the decision for care was made during this visit).
Scenario 2 — Inpatient: Surgical Repair and Sequencing
Clinical Vignette: A 45-year-old female is admitted after an ATV accident. She sustained a severe concussion with a brief loss of consciousness, as well as a displaced fracture of the left mandibular body. The maxillofacial surgeon takes her to the OR for an open reduction and internal fixation (ORIF) of the left mandible with arch bar placement.
Principal Diagnosis:
- S06.0X1A — Concussion with loss of consciousness of 30 minutes or less, initial encounter (Reason for observation/admission).
Secondary Diagnoses:
- S02.602A — Fracture of unspecified part of body of left mandible, initial encounter for closed fracture (Role — CC; Note: Specific laterality used here due to documentation of “left mandible”).
MS-DRG Assignment: Because the mandibular fracture is sequenced as a secondary diagnosis, it acts as a Complication or Comorbidity (CC), which will shift the grouping to a higher-weighted DRG (e.g., MS-DRG 092 - Other Disorders of Nervous System with CC).
Scenario 3 — CDI Query: Clarifying Laterality
Clinical Vignette: A trauma admission note lists “fracture of the body of the mandible, closed, awaiting surgical repair.” The physical exam notes swelling on the “right side of the face,” but the specific fracture side is not explicitly linked in the final assessment.
Action / Outcome: The coder flags the chart for a CDI query because using S02.600A (unspecified side) is highly likely to result in a payer denial for a traumatic injury. The coder queries the provider: “Please clarify the laterality of the mandibular body fracture noted in your assessment based on the exam findings.”
Query Response: Provider updates the addendum to confirm: “Right mandibular body fracture, closed.”
Corrected ICD-10-CM Coding:
- S02.601A — Fracture of unspecified part of body of right mandible, initial encounter for closed fracture
⚠️ Coding Pitfalls and Tips
| Pitfall or Tip | |
|---|---|
| ❌ | Defaulting to Unspecified Laterality. Submitting S02.600A when the medical record clearly indicates right or left elsewhere (like in a radiology report) is a common compliance error. Always read the full note and query if necessary. |
| ❌ | Missing the “Open” vs “Closed” Designation. Facial bone fractures often breach the mucosa. If the provider notes “tooth involvement with mucosal tear at the fracture site,” it must be coded as an open fracture (7th character B). |
| ✅ | 7th Character D for Follow-Up. When the patient returns to the office after the initial emergency visit or surgery to have their wires checked or removed, transition the 7th character from A to D (e.g., S02.600D) to indicate a subsequent encounter for routine healing. |
| ✅ | Query for Anatomic Specificity. The mandible has several parts (symphysis, body, angle, ramus, condyle). If the provider simply writes “jaw fracture,” query to see if it is specifically a body fracture before defaulting to the general S02.609A (Fracture of mandible, unspecified). |
📚 Sources
- CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting, FY2026.
- American Association of Oral and Maxillofacial Surgeons (AAOMS). Coding and Billing Guidelines for Maxillofacial Trauma.
- CMS. IPPS Final Rule FY2026 — MS-DRG Definitions Manual v43. MDC 03 logic tables.
- AMA. CPT Professional Edition 2026. Surgery / Musculoskeletal System.