CPT 27499: Fasciotomy of Thigh/Knee with Debridement - OpenPayer

Summary & Overview

CPT 27499: Fasciotomy of Thigh/Knee with Debridement

CPT code 27499 represents an operative fasciotomy of multiple compartments in the thigh and/or knee with removal of dead or damaged tissue. It is used for urgent surgical management of elevated compartmental pressures—commonly in settings of trauma, reperfusion injury, or severe soft-tissue swelling—where timely intervention preserves limb viability and prevents permanent neuromuscular damage. Nationally, this code is clinically important because it captures emergent orthopedic interventions that have significant implications for inpatient surgical billing, resource utilization, and post-operative care pathways.

Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides readers with benchmarks for payer coverage patterns, common billing modifiers and clinical documentation considerations, and an overview of how 27499 is positioned within surgical service lines and hospital billing workflows.

Readers will learn the clinical context for use of CPT code 27499, typical sites of service, expected coding scenarios, and where to find additional coding resources. Data not available in the input is explicitly noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 27499fasciotomydebridementorthopedic surgerycompartment syndromesurgical procedurehospital inpatientemergency surgery

Billing Code Overview

CPT code 27499 describes a surgical procedure in which the clinician performs fasciotomy of multiple compartments in the thigh and/or knee to relieve compartmental pressure and improve blood flow, and concurrently debrides necrotic or nonviable tissue. This service is categorized as an orthopedic/trauma surgical procedure addressing acute compartment syndrome or other critical soft-tissue pressure-related conditions.

Service type: Surgical fasciotomy with debridement
Typical site of service: Hospital operating room or emergency surgical suite

Clinical & Coding Specifications

Clinical Context

A 32-year-old male presents to the emergency department after a closed mid-thigh crush injury sustained during an industrial accident. He reports severe pain, tense swelling of the anterior thigh, and paresthesia in the lateral leg. On exam the compartment is firm and painful with passive stretch; distal pulses are present but sensory deficit is noted. Compartment pressure measurement confirms elevated intracompartmental pressures (>30 mmHg). The orthopedic surgical team is consulted and performs urgent fasciotomies of the affected thigh compartments with debridement of nonviable muscle tissue under general anesthesia. The patient is admitted to the surgical unit for wound care, serial exams, and planned secondary closure or skin grafting.

Typical workflow:

Initial assessment in ED with neurovascular exam and compartment pressure measurements.
Imaging as indicated (radiographs for fracture, ultrasound/CTA if vascular injury suspected).
Preoperative consent and anesthesia evaluation.
Operative fasciotomy (27499) with compartment release and removal of devitalized tissue.
Postoperative monitoring for reperfusion injury, infection, and need for further debridement or reconstruction.
Documentation includes indication (acute compartment syndrome), compartments released, extent of debridement, intraoperative findings, and plan for wound management.

Coding Specifications

CPT 27430: Quadriceps Femoris Release to Improve Knee Flexion

cpt-27396-thigh-tendon-transfer

CPT 27396: Thigh Muscle Tendon Transfer

cpt-27394-hamstring-tendon-lengthening-unilateral

CPT 27394: Hamstring Tendon Lengthening, Unilateral

cpt-27495-femoral-defect-fixation-internal-implant

CPT 27495: Femoral Defect Fixation with Internal Implants

cpt-27415-open-knee-allograft-osteochondral-repair

CPT 27415: Open Knee Allograft for Osteochondral Defect Repair

27487

CPT 27487: Revision of Total Knee Arthroplasty, With or Without Allograft

27488

CPT 27488: Removal of Total Knee Prosthesis, With or Without Spacer

cpt-27441-tibial-reconstruction-debridement-partial-synovectomy-knee

CPT 27441: Tibial Reconstruction with Debridement and Partial Synovectomy

cpt-27392-open-tenotomy-hamstring-bilateral

CPT 27392: Open Tenotomy of Bilateral Hamstring Tendons

cpt-27458-femoral-lengthening-with-internal-device

CPT 27458: Femoral Osteotomy with Intramedullary Lengthening Device

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Taxonomy Code	Specialty	Notes
`207L00000X`	Orthopaedic Surgery	Orthopedic trauma surgeons commonly perform thigh/knee fasciotomies and debridement.
`207P00000X`	Podiatry (not typical)	Not commonly primary for thigh procedures; included only if applicable to lower extremity compartment work.
`208000000X`	General Surgery	General surgeons perform fasciotomies in trauma or when orthopedics unavailable.
`208600000X`	Vascular Surgery	Vascular surgeons may be involved when ischemia/vascular injury coexists and for revascularization.
`208100000X`	Plastic Surgery	Plastic surgeons participate for complex soft tissue reconstruction and wound closure.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`T79.AXXA`	Traumatic compartment syndrome of lower extremity, initial encounter	Direct indication for fasciotomy of thigh/knee compartments.
`S76.11XA`	Strain of muscle, fascia and tendon of anterior muscle group of thigh, initial encounter	Can be associated with swelling and muscle injury leading to rising compartment pressures.
`S72.001A`	Fracture of unspecified part of femur, initial encounter for closed fracture	Femoral fractures are a common cause of thigh compartment syndrome requiring decompression.
`I96`	Gangrene, not elsewhere classified	Advanced ischemia with tissue necrosis that may necessitate debridement during fasciotomy.
`M79.61`	Pain in limb	Symptom code often present in initial documentation; supports clinical picture but is nonspecific.
`R58`	Hemorrhage, not elsewhere classified	Significant bleeding into a compartment can raise pressures and trigger fasciotomy.
`T81.12XA`	Hemorrhage and hematoma complicating a procedure, initial encounter	Relevant for postoperative compartment syndrome requiring return to OR and further decompression.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11042`	Debridement, subcutaneous tissue (first 20 sq cm or less)	May be reported for additional staged debridement of necrotic tissue contiguous with fasciotomy sites when separate and meeting CPT criteria.
`11043`	Debridement, muscle and/or fascia (first 20 sq cm or less)	Used when debridement includes muscle and fascia beyond routine fasciotomy release and meets debridement reporting rules.
`12032`	Repair full thickness wound of trunk, arms, legs; 2.5 cm to 7.5 cm	May be used for definitive closure of fasciotomy wounds if primary closure is performed later.
`15275`	Split-thickness autograft, trunk/arms/legs; first 100 sq cm or less	Used when skin grafting is required for fasciotomy wound coverage after debridement and delayed closure.
`73560`	Radiologic examination, knee; 2 views	Preoperative plain radiographs frequently performed to evaluate for associated fracture or joint injury.
`93925`	Duplex scan of extremity veins or arteries, unilateral or bilateral study	Vascular imaging performed when arterial injury or deep venous thrombosis is a concern in the injured limb.

`11`	Normal, distinct procedural service	When `27499` is the primary planned procedure performed without complications.
`22`	Increased procedural services	When extensive debridement or unusually complex fasciotomy significantly increases work.
`52`	Reduced services	When fasciotomy is attempted but incomplete or limited compared with full procedure.
`53`	Discontinued procedure	If procedure is started but halted due to patient instability prior to completion.
`54`	Surgical care only	When billing only the surgical portion and another provider bills pre/postoperative care separately.
`55`	Postoperative management only	When another surgeon bills the operative event and this provider provides only postop care.
`62`	Two surgeons	When two surgeons of different specialties perform distinct operative components.
`63`	Procedures on infants/neonates	When performed on a neonatal patient meeting age criteria.
`66`	Surgical team complexity	When a coordinated surgical team reports team-based care for complex cases.
`78`	Return to OR for related procedure during global period	For unplanned return to the operating room for a related fasciotomy revision.
`79`	Unrelated procedure or service by the same physician during the postoperative period	(Not in provided list) Omitted.
`50`	Bilateral procedure	When bilateral thigh fasciotomies are performed (use per payer guidance).
`51`	Multiple procedures	When additional unrelated procedures are performed during the same operative session.

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