Summary & Overview

CPT 27724: Repair of Tibial Nonunion or Malunion with Bone Graft

CPT code 27724 denotes surgical repair of a malunited or nonunited tibial fracture with placement of an iliac or other bone graft between the fragments. This procedure addresses persistent pain and functional loss after inadequate fracture healing and is commonly performed in hospital operating rooms or ambulatory surgical centers. Nationally, the code matters because tibial nonunions and malunions are important contributors to prolonged disability, high resource use, and variable payer coverage policies for operative management.

Key payers discussed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for the procedure, typical sites of service, and the role of bone grafting in restoring alignment and promoting union. The publication also summarizes benchmark utilization patterns, coding and billing considerations relevant to outpatient and inpatient surgical settings, and recent policy trends affecting prior authorization and medical necessity reviews. Where specific payer policy language is not available, the report notes that input data were not provided.

This summary is intended for health policy analysts, coding professionals, and clinical leaders seeking a national-level briefing on utilization, reimbursement dynamics, and policy developments related to CPT code 27724.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 27724tibia fracture repairbone graftingorthopedic surgerynonunionmalunionsurgical proceduresambulatory surgeryhospital inpatientmedical necessity

Billing Code Overview

CPT code 27724 describes the surgical repair of a malunited or nonunited fracture of the tibia in which the surgeon places an iliac or other bone graft between the fracture fragments. The procedure is performed to restore lower-extremity function and relieve pain when prior fracture healing is inadequate.

Service type: Surgical fracture repair with bone grafting
Typical site of service: Hospital operating room or ambulatory surgical center

Clinical & Coding Specifications

Clinical Context

A 46-year-old male presents with persistent pain, instability, and difficulty weight-bearing six months after a closed tibial shaft fracture managed conservatively with casting. Radiographs and CT demonstrate a persistent nonunion with malalignment and loss of length. The orthopedic trauma surgeon schedules an open corrective procedure to restore alignment, obtain union, and relieve pain.

The procedure includes exposure of the tibial nonunion site, debridement of fibrous tissue, direct reduction of the bone fragments, placement of an autologous iliac crest bone graft between the fragments, and fixation with internal hardware (plate and screws or intramedullary device) to achieve stability. Intraoperative fluoroscopy is used to confirm alignment and hardware placement. The patient is typically admitted to an outpatient or inpatient surgical facility depending on comorbidities and anticipated postoperative pain control needs, with perioperative antibiotics and routine neurovascular monitoring. Postoperative care includes immobilization, pain control, physical therapy initiation as tolerated, and follow-up imaging to document progression to union.

Coding Specifications

Modifier	Description	When to Use
`LT`	Left side	Use when the procedure is performed on the left tibia.
`RT`	Right side	Use when the procedure is performed on the right tibia.
`50`	Bilateral procedure	Use when both tibiae are treated during the same operative session.
`22`	Increased procedural services	Use when work, time, and complexity substantially exceed typical for `27724` (document rationale).
`62`	Two surgeons	Use when two surgeons of different specialties perform distinct portions of the operation.
`80`	Assistant surgeon	Use when a qualified assistant surgeon performs part of the procedure.
`81`	Minimum assistant surgeon	Use when a minimal assistant is required and documented.
`79`	Unrelated procedure or service by same physician during postoperative period	Use when an unrelated procedure is performed during the global period.
`58`	Staged or related procedure or service by same physician during postoperative period	Use when this procedure is planned as part of staged care following an initial operation.
`59`	Distinct procedural service	Use when a separate, distinct procedural service is performed and needs to be distinguished from other billed services.
`76`	Repeat procedure by same physician	Use when the exact procedure is repeated later same day by the same physician.
`77`	Repeat procedure by another physician	Use when the exact procedure is repeated later same day by a different physician.
`53`	Discontinued procedure	Use when the procedure is attempted but terminated due to extenuating circumstances.

Taxonomy Code	Specialty	Notes
207L00000X	Orthopaedic Surgery	Fellowship-trained trauma/limb reconstruction surgeons commonly perform tibial nonunion repairs.
207X00000X	Surgery	General orthopedic surgeons in community settings perform this procedure.
2080P0002X	Physical Medicine & Rehabilitation	PM&R may manage pre- and post-op functional rehabilitation.
207RH0002X	Hand Surgery (example of surgical subspecialty taxonomy)	Not primary for tibia but included if limb reconstruction subspecialty coding applies.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M84.151A`	Nonunion of fracture, right tibia, initial encounter	Represents a tibial nonunion on the right; directly indicates the need for revision and grafting.
`M84.152A`	Nonunion of fracture, left tibia, initial encounter	Represents a tibial nonunion on the left.
`M84.151D`	Nonunion of fracture, right tibia, subsequent encounter	Used for follow-up encounters in ongoing treatment of nonunion.
`M84.152D`	Nonunion of fracture, left tibia, subsequent encounter	Used for follow-up encounters in ongoing treatment of nonunion.
`M84.151S`	Nonunion of fracture, right tibia, sequela	Used when addressing long-term sequelae related to prior tibial fracture nonunion.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`27486`	Open treatment of tibial shaft fracture, with or without internal or external fixation, with manipulation, when performed; with open reduction and internal fixation, when performed	May be used when primary fracture fixation is performed as the main service rather than a corrective nonunion repair; sometimes billed in conjunction if distinct procedures are performed.
`20936`	Autograft for spine or other large bone graft (e.g., iliac crest), includes obtaining graft when performed	Billed for harvesting an autologous iliac crest bone graft when reported separately from the nonunion repair if payer allows separate graft harvesting code.
`20680`	Removal of implant; deep (e.g., buried)	May be performed prior to or during nonunion repair if prior hardware is present and must be removed.
`73030`	Radiologic examination, ankle and foot; complete, minimum of 3 views	Preoperative and postoperative radiographs of the tibia/ankle region; radiology codes are part of the perioperative workflow.
`27488`	Open treatment of tibial shaft fracture, with or without internal or external fixation, with manipulation, when performed; with intramedullary implant (e.g., rod)	Relevant if intramedullary fixation is used to stabilize the nonunion after grafting.