CPT 21385 Orbital Floor Repair Reimbursement | OpenPayer

Summary & Overview

CPT 21385: Orbital Floor Repair for Blowout Fracture

CPT code 21385 represents open repair of the orbital floor accessed via an intraoral incision to treat blowout fractures from blunt trauma. The code captures a focused, reconstructive craniofacial procedure aimed at restoring ocular support, facial contour, and function after traumatic injury. Nationally, this code is relevant across trauma centers, plastic and maxillofacial surgery practices, and ambulatory surgical settings where facial trauma is managed.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context about when the service is used, typical sites of service, and common billing considerations tied to reconstructive orbital surgery. The publication also provides benchmark framing for utilization and reimbursement patterns, notes on modifier usage when available, and pointers to related service lines and codes where relevant.

This summary is intended to orient clinicians, billing professionals, and policy analysts to the primary purpose and clinical setting for CPT code 21385, and to highlight the areas of billing and policy scrutiny most likely to affect coverage and payment decisions at a national level.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare21385CPTorbital floor repairorbital fracturefacial traumamaxillofacial surgeryreconstructive surgeryambulatory surgery

Billing Code Overview

CPT code 21385 describes surgical repair of the orbital floor (the bony structure supporting the eye) performed to restore facial form and function after a blowout fracture caused by blunt trauma. The procedure involves accessing the orbital floor through an incision in the mouth to reduce fractures and repair the orbital floor.

Service type: Surgical procedure — orbital fracture repair

Typical site of service: Hospital operating room or ambulatory surgical center

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 28-year-old male presents to the emergency department after an assault in which he sustained blunt facial trauma with periorbital swelling, diplopia on upward gaze, and numbness of the infraorbital region. CT imaging demonstrates an isolated orbital floor (blowout) fracture with herniation of orbital fat into the maxillary sinus and mild enophthalmos. After evaluation by an otolaryngologist and an ophthalmologist, the patient is taken to the operating room for open reduction and internal repair of the orbital floor via a transoral (gingivobuccal sulcus) approach to reposition herniated soft tissue and place an implant.

Clinical workflow:

Initial ED evaluation with trauma assessment, facial CT, ophthalmologic exam (visual acuity, extraocular movements, globe integrity).
Preoperative planning and informed consent; determination of surgical approach (transoral incision to access orbital floor).
General anesthesia; intraoral incision in the gingivobuccal sulcus; exposure of the orbital floor fracture; reduction of herniated tissue; placement of implant (resorbable or titanium mesh) and fixation as needed; intraoperative assessment of globe position and ocular motility.
Closure of intraoral incision; postoperative ophthalmology reassessment; discharge with activity restrictions and outpatient follow-up for wound check and ocular function monitoring.

Coding Specifications

Modifier	Description

Related Codes

CPT-21345-NASOMAXILLARY-FRACTURE-REPAIR

CPT 21345: Nasomaxillary Complex Fracture Repair

CPT-21432-CRANIOFACIAL-FRACTURE-REPAIR-WITH-FIXATION

CPT 21432: Cranium-to-Facial Fracture Repair with Fixation

CPT-21470-MANDIBLE-FRACTURE-COMPLICATED-OPEN-REPAIR-INTERNAL-FIXATION

CPT 21470: Complex Mandible Fracture Repair with Internal Fixation

CPT-21485-TMJ-DISLOCATION-REDUCTION-WITH-FIXATION

CPT 21485: TMJ Dislocation Reduction with Fixation

CPT-21335-OPEN-REDUCTION-NASAL-BONE-NASAL-SEPTUM-FRACTURE

CPT 21335: Open Reduction of Nasal Bone and Nasal Septum Fracture

CPT-21453-MANDIBULAR-FRACTURE-REPAIR-INTRAORAL-FIXATION

CPT 21453: Mandibular Fracture Repair with Intraoral Fixation

CPT-21452-MANDIBLE-FRACTURE-EXTERNAL-FIXATION

CPT 21452: Mandible Fracture Repair with External Fixation

CPT-21454-MANDIBULAR-FRACTURE-EXTERNAL-FIXATION

CPT 21454: Mandibular Fracture Repair with External Fixation

CPT-21433-CRANIOFACIAL-FRACTURE-REPAIR-SKULL-FACE-SEPARATION

CPT 21433: Repair of Craniofacial Fractures with Skull-Facial Separation

CPT-21421-MAXILLARY-FRACTURE-REDUCTION-AND-SPLINTING

CPT 21421: Maxillary Fracture Reduction and Splinting

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Taxonomy Code	Specialty	Notes
207XS0100X	Oral and Maxillofacial Surgery	Common specialist for facial fracture repair including transoral orbital floor access.
207K00000X	Otolaryngology (ENT)	Performs midface and orbital floor repair in trauma cases.
207Q00000X	Plastic Surgery	Performs reconstruction of orbital fractures with aesthetic considerations.
207W00000X	Ophthalmology	Provides perioperative ocular assessment and may assist with orbital procedures.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S02.34XA`	Fracture of orbital floor, initial encounter	Direct diagnosis indicating an orbital floor blowout fracture requiring repair with `21385`.
`S02.41XA`	Fracture of malar and maxillary bones, initial encounter	Associated midface fractures that may accompany orbital floor injury and alter surgical approach.
`S02.5XXA`	Fracture of nasal bones, initial encounter	Nasal fractures often occur with facial trauma and may be addressed in the same episode.
`S09.90XA`	Unspecified injury of head, initial encounter	Used when head injury is documented along with facial fractures and guides trauma management.
`H02.89`	Other specified disorders of eyelid	Periocular soft-tissue injuries that may accompany orbital fractures and require evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`21385`	Open treatment of orbital floor fracture, with internal fixation, via transoral approach	Primary procedure for repair of orbital floor blowout fracture accessed through a mouth incision.
`21045`	Reconstruction of orbital floor and rim, complex	Used when more extensive reconstruction of orbital rim/floor is required beyond isolated floor repair; may be performed in the same episode for complex fractures.
`61783`	Stereotactic ablation (not applicable)	Data not available in the input.
`31256`	Septoplasty or endoscopic sinus procedures (adjacent procedures)	Performed concurrently if sinonasal access or repair is needed during transoral approach or to address associated sinus injury.
`66984`	Cataract extraction (not applicable)	Data not available in the input.

`22`	Increased procedural services	Use when the surgeon documents substantially greater work than typical for `21385` (e.g., extensive dissection, large defect, prolonged operative time) with supporting operative note.
`23`	Unusual anesthesia	Use when a procedure usually done under local anesthesia must be performed under general anesthesia due to unusual circumstances documented in the record.
`26`	Professional component	Use when billing separates professional (surgeon) component from technical component of a service that has distinct technical work (rare for `21385` but applicable if combined with separately billable imaging interpretation).
`50`	Bilateral procedure	Use when identical repair is performed on both orbital floors during the same operative session.
`51`	Multiple procedures	Use when `21385` is billed with other unrelated surgical procedures during the same operative session; append to additional procedures per payer rules.
`52`	Reduced services	Use when a partially reduced service is performed and documented (e.g., planned repair begun but not completed due to unforeseen condition).
`53`	Discontinued procedure	Use when the procedure is started but aborted for patient safety reasons prior to completion; operative report must document reason.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure and documentation supports concurrent active participation.
`76`	Repeat procedure by same physician	Not in provided list. (Excluded)
`78`	Unplanned return to OR	Use when the patient requires an unplanned return to the operating room for a related procedure during the postoperative global period (e.g., revision for orbital hematoma).
`80`	Assistant surgeon	Use when an assistant surgeon participates in the procedure and payer requires documentation for assistant allowance.
`81`	Minimum assistant surgeon	Use when only minimal assistance was required and payer accepts reduced assistant fee.
`62`	Two surgeons	(Duplicate entry avoided)