CPT 15738Surgery

Muscle-skin graft leg

CPT code 15738 covers a surgical procedure where a surgeon transfers a section of muscle and overlying skin from one area of the body to repair or reconstruct the leg. This complex graft includes both muscle tissue and the skin attached to it, used when simpler skin grafts won't provide adequate coverage or function.

Showing rates for

National Average

Base Medicare rate

$1,233.05

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

19.04

PE RVU (NF)

15.43

MP RVU

3.65

Total RVU

38.12

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document exact graft dimensions in square centimeters and specify donor site location (e.g., latissimus dorsi, rectus abdominis, gracilis) in the operative report
Impact: Prevents 30-40% of medical necessity denials and supports modifier 22 claims for unusually large grafts exceeding typical size parameters
Code separately for donor site closure when complex reconstruction is required (CPT 15777 for implantation of biologic implant or adjacent tissue transfer)
Impact: Can add $200-800 in additional reimbursement depending on donor site complexity; requires documentation that closure exceeded simple layered closure
For free flaps requiring microvascular anastomosis, ensure operative report documents vessel identification, anastomosis technique, and patency confirmation
Impact: Critical for audit defense as CMS may request detailed documentation; inadequate vascular documentation accounts for 25% of post-payment review denials
Bill debridement separately only if performed at a separate session prior to the muscle-skin graft; debridement on the same date is included in 15738
Impact: Prevents $150-400 in unbundling denials; debridement codes 11042-11047 are bundled per NCCI edits when performed same-day
Verify pre-authorization requirements with commercial payers before surgery; most require prior authorization citing muscle-skin graft as high-cost procedure
Impact: Prevents 100% payment denial; commercial payer reimbursement typically ranges $2500-5500, making pre-auth non-negotiable
Use diagnosis codes that clearly establish medical necessity such as traumatic amputation, malignant neoplasm status post resection, chronic osteomyelitis, or pressure ulcer with bone involvement

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 15738 in 2025?

The 2025 Medicare national average reimbursement for CPT 15738 is $1233.05 for both facility and non-facility settings. This rate is based on 38.12 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary based on geographic locality adjustments.

What is the difference between CPT 15738 and a regular skin graft?

CPT 15738 describes a muscle-skin graft (myocutaneous flap) that transfers both muscle tissue and attached skin to the leg, whereas regular skin grafts (15120-15121) transfer only skin. The muscle component provides blood supply, fills dead space, and covers exposed structures like bone or hardware that skin-only grafts cannot adequately address.

Can CPT 15738 be billed bilaterally with modifier 50?

Yes, CPT 15738 can be billed with modifier 50 when muscle-skin grafts are performed on both legs during the same operative session. Bilateral billing typically reimburses at 150% of the single procedure rate, approximately $1849.58 for Medicare, with appropriate documentation of separate medical necessity for each leg.

What diagnosis codes support medical necessity for CPT 15738?

Diagnosis codes supporting CPT 15738 include traumatic complications (S71-S81 series), malignant neoplasm status post resection (C40-C41, C49 with Z85 history), chronic osteomyelitis (M86), pressure ulcers with bone involvement (L89 with stage 3-4), and non-healing surgical wounds. Documentation must demonstrate why composite tissue transfer was necessary over simpler alternatives.

Is prior authorization required for CPT 15738?

Medicare typically does not require prior authorization for CPT 15738, but most commercial payers, Medicare Advantage plans, and workers' compensation carriers do require pre-authorization due to the high cost and complexity of muscle-skin graft procedures. Always verify specific payer requirements before scheduling surgery to avoid claim denials.

How many RVUs is CPT code 15738 worth in 2025?

CPT 15738 has 38.12 total RVUs in 2025, consisting of 19.04 work RVUs, 15.43 practice expense RVUs, and 3.65 malpractice RVUs. This high RVU value reflects the significant complexity, time, and resources required for muscle-skin graft procedures.

Can debridement be billed separately with CPT 15738?

Debridement performed on the same date as the muscle-skin graft is bundled into CPT 15738 per NCCI edits and cannot be billed separately. Only if debridement is performed at a distinct prior session with separate documentation can codes 11042-11047 be reported. Same-day debridement is considered preparatory work included in the graft procedure.