⚕️ICD-10 CM 21395 - Open treatment of complicated comminuted orbital floor fracture, with or without associated medial wall or lateral wall fracture; with bone graft (includes obtaining graft)

Code Description

ICD-10 CM 21395 represents Open treatment of complicated comminuted orbital floor fracture, with or without associated medial wall or lateral wall fracture; with bone graft (includes obtaining graft). This complex surgical procedure involves the open reduction and internal fixation of severely fragmented orbital floor fractures using bone graft material to reconstruct the orbital structure. The code includes harvesting the bone graft from the patient or using allograft material.^{AMA CPT}

Clinical Overview

Orbital floor fractures, commonly known as “blowout fractures,” occur when force applied to the eye causes the thin bones of the orbital floor to fracture. Complicated comminuted fractures involve multiple bone fragments and often require reconstruction with bone grafts to restore orbital volume and prevent enophthalmos (sunken eye). Indications for surgery include diplopia (double vision), enophthalmos, large fracture defects, or muscle entrapment. The procedure typically involves a transantral or transorbital approach, reduction of herniated orbital contents, and placement of bone graft or implant for support.^AOOMS

Coding Hierarchy (Code Tree)

This code exists within the following hierarchy in the CPT structure:

Section: Surgery
- Subsection: Musculoskeletal System
  - Section: Facial Bones
    - Subsection: Fractures
      - Category: Orbital Floor/Wall Fractures
        
        Code: Open treatment of complicated comminuted orbital floor fracture with bone graft (21395)

Official Coding Guidelines & Notes

Includes

This code includes procedures specified as:

Open reduction of comminuted orbital floor fracture
Bone graft placement for orbital reconstruction
Harvesting of autogenous bone graft
Repair of associated medial or lateral wall fractures
Reconstruction of orbital volume^{AMA CPT}

Bundling & Component Services

Note: Certain services are bundled into 21395 and should not be reported separately.

Bone Graft Harvest: Obtaining the bone graft is included; do not report separate graft harvest codes (e.g., 20900, 20902).
Local Anesthesia: Included in the surgical package.
Simple Debridement: Minor wound preparation is included.
Orbital Implant: If synthetic implant is used instead of bone graft, see 21390.
Postoperative Care: Routine follow-up care is included in the global period.^NCCI

Excludes

Note: Do not use 21395 for these conditions/procedures.

Simple Orbital Fracture: If fracture is not comminuted and does not require graft, use 21385 or 21386.
Without Bone Graft: If open treatment is performed without bone graft, use 21390 (Open treatment of orbital floor fracture, without bone graft).
Closed Treatment: If fracture is treated without incision, use closed treatment codes.
Other Facial Fractures: Fractures of nasal, zygomatic, or maxillary bones have separate codes.
Ocular Injury: Separate codes for eye injuries (e.g., S05.-) should be reported additionally.^{AMA CPT}

Coding Tips

Documentation: Ensure the operative report clearly documents “comminuted” fracture and “bone graft” usage.
Graft Source: Document the source of bone graft (autogenous, allograft, or synthetic).
Laterality: Orbital fractures are unilateral; use modifier -50 only if bilateral fractures are repaired during the same session.
Global Period: This code typically has a 90-day global period; routine postoperative care is bundled.^{CMS MPFS}
Diagnosis Link: Link to the appropriate fracture code from Chapter 19 (Injury, poisoning and certain other consequences of external causes).
Concurrent Procedures: If other facial fractures are repaired, report each separately with appropriate modifiers.^{Coding Clinic}
Imaging: Preoperative and postoperative imaging (CT scans) are billed separately if performed.^NCCI

Reimbursement & Risk Adjustment

HCC (Hierarchical Condition Category)

Status: N/A
Reason: HCC models apply to ICD-10-CM diagnosis codes, not CPT procedure codes. However, the diagnosis driving this procedure (e.g., S05.2XXA) may be HCC eligible.^{CMS Risk Adjustment}

wRVU (Work Relative Value Unit)

Value: Yes (Variable)
Reason: 21395 is assigned a wRVU under the Medicare Physician Fee Schedule (MPFS). The exact value varies annually and by facility vs. non-facility setting.^{CMS MPFS}
Impact: Determines physician reimbursement relative to other services. Typically carries high wRVU due to surgical complexity and microsurgical nature.

Assistant Surgeon Payable

Status: Yes
Reason: This code typically allows for an assistant surgeon (modifiers -80, -81, -82) if medically necessary and permitted by payer policy, given the technical complexity of orbital reconstruction.^{CMS MPFS}

MS-DRG Applicability: No (Inpatient Facility)
Reason: Inpatient hospital reimbursement uses ICD-10-PCS for procedure coding, not CPT. CPT is used for physician billing.
APC Applicability: Yes (Outpatient Facility)
Impact: For outpatient hospital reimbursement, this code maps to an Ambulatory Payment Classification (APC) under OPPS. It typically falls under ENT/Facial Surgery or Ophthalmology Procedures.^{CMS OPPS}

Coding Examples

Example 1: Acute Orbital Floor Fracture with Bone Graft

Scenario: A patient presents to the ER after being struck in the eye during an assault. CT confirms comminuted orbital floor fracture with herniation of orbital contents. Patient undergoes open reduction with autogenous bone graft from iliac crest.

Primary Procedure: 21395 (Open treatment of complicated comminuted orbital floor fracture with bone graft)
Diagnosis: S05.20XA (Laceration and rupture of eye without prolapse or loss of intraocular tissue, unspecified eye, initial encounter)
Diagnosis: S02.83XA (Fracture of orbit, initial encounter for closed fracture)
Note: Bone graft harvest is included; do not report separately.^{Coding Clinic}

Example 2: Delayed Repair with Enophthalmos

Scenario: Patient presents 3 weeks after injury with significant enophthalmos and diplopia. CT shows large orbital floor defect requiring reconstruction.

Primary Procedure: 21395 (Open treatment of complicated comminuted orbital floor fracture with bone graft)
Diagnosis: S02.83XD (Fracture of orbit, subsequent encounter for fracture with routine healing)
Diagnosis: H05.42 (Enophthalmos due to atrophy of orbital structures)
Diagnosis: H53.2 (Diplopia)
Note: Document the delayed nature and functional impairments.^{AMA CPT}

Example 3: Combined Facial Fractures

Scenario: Patient sustains multiple facial fractures including orbital floor and zygomatic arch. Both are repaired during the same session.

Primary Procedure: 21395 (Open treatment of complicated comminuted orbital floor fracture with bone graft)
Secondary Procedure: 21365 (Open treatment of zygomatic fracture)
Modifier: 51 (Multiple Procedures) on secondary code
Diagnosis: S02.83XA (Fracture of orbit, initial encounter)
Diagnosis: S02.4XXA (Fracture of malar and maxillary bones, initial encounter)
Note: Report each fracture repair separately.^NCCI

Example 4: Bilateral Orbital Fractures

Scenario: Patient sustains bilateral orbital floor fractures from motor vehicle accident. Both orbits are repaired during the same session with bone grafts.

Primary Procedure: 21395 (Open treatment of complicated comminuted orbital floor fracture with bone graft)
Modifier: -50 (Bilateral Procedure)
Diagnosis: S02.83XA (Fracture of orbit, initial encounter) - bilateral
Note: Some payers may require -RT and -LT instead of -50.^{CMS MPFS}

Example 5: Postoperative Complication Return

Scenario: Patient returns to OR within global period for revision due to graft displacement.

Primary Procedure: 21395
Modifier: -78 (Unplanned Return to the Operating/Procedure Room by the Same Physician for Related Procedure During Postoperative Period)
Diagnosis: T84.030A (Mechanical loosening of internal bone graft, initial encounter)
Note: Modifier -78 reduces reimbursement but indicates related return.^{CMS MPFS}

Common modifiers applicable to 21395:

[-[22]]: Increased Procedural Services (if work required is substantially greater than typical).
-24: Unrelated Evaluation and Management Service by the Same Physician or Other Qualified Health Care Professional During a Postoperative Period.
-50: Bilateral Procedure (if both orbits are repaired during same session).
-51: Multiple Procedures (if other distinct procedures are performed during same session).
-59: Distinct Procedural Service (if performed at a different site or session to bypass NCCI edits).
-76: Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional.
-77: Repeat Procedure by Another Physician or Other Qualified Health Care Professional.
-78: Unplanned Return to the Operating/Procedure Room by the Same Physician or Other Qualified Health Care Professional Following Initial Procedure for a Related Procedure During the Postoperative Period.
-79: Unrelated Procedure or Service by the Same Physician or Other Qualified Health Care Professional During the Postoperative Period.
-80: Assistant Surgeon.
-81: Minimum Assistant Surgeon.
[-[82]]: Assistant Surgeon (when qualified resident surgeon not available).
-RT: Right Side.
-LT: Left Side.^{AMA CPT}

Sources

^{AMA CPT} American Medical Association, CPT Professional Edition. ^AAOMS American Association of Oral and Maxillofacial Surgeons, Facial Trauma Resources. ^ASOPRS American Society of Ophthalmic Plastic and Reconstructive Surgery, Orbital Fracture Guidelines. ^NCCI CMS National Correct Coding Initiative Policy Manual. ^{Coding Clinic} AHA Coding Clinic for CPT. ^{CMS Risk Adjustment} CMS Medicare Advantage Risk Adjustment Data Processing System. ^{CMS MPFS} CMS Medicare Physician Fee Schedule. ^{CMS OPPS} CMS Outpatient Prospective Payment System.

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21395