CPT 15100Surgery

Splt agrft t/a/l 1st 100sqcm

CPT 15100 covers the surgical procedure of harvesting and placing a split-thickness skin graft (partial layers of skin) on a wound, covering the first 100 square centimeters of area. This is commonly used for burn victims, trauma injuries, or after removal of large skin lesions.

Showing rates for

National Average

Base Medicare rate

$846.18

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

9.9

PE RVU (NF)

14.34

MP RVU

1.92

Total RVU

26.16

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

NCCI bundling edits

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Billing tips

Verify facility versus non-facility status before billing, as the place of service determines which rate applies
Impact: $144.91 difference between settings; incorrect POS code results in $144.91 underpayment or overpayment subject to recoupment
Use add-on code 15101 for each additional 100 sq cm or part thereof beyond the first 100 sq cm to capture full work performed
Impact: Each 15101 unit adds approximately $189-242 in additional reimbursement; failure to bill loses significant revenue on large grafts
Document total square centimeter measurement precisely in the operative note with calculation methodology, as this determines unit billing
Impact: Inadequate size documentation leads to downcoding or denial; proper documentation supports medical necessity for high-RVU claims
Bill separately for donor site preparation and closure when performed on different anatomical areas using appropriate codes
Impact: Harvesting site work may justify additional codes, potentially adding $200-400 depending on complexity and location
Ensure the anatomical site matches the code descriptor (trunk, arms, legs); use 15120-15121 for face/scalp/neck/hands/feet/genitalia
Impact: Wrong anatomical code family results in denial; 15120 has different RVU values and may reimburse differently based on complexity
When billing with debridement codes (11042-11047), append modifier 59 to 15100 and ensure documentation shows distinct separate services
Impact: Prevents bundling denials worth $846.18; debridement codes add $75-350 depending on depth and size when properly unbundled

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 15100 in 2025?

The 2025 Medicare national average reimbursement for CPT 15100 is $846.18 in non-facility settings and $701.27 in facility settings. These rates are based on 26.16 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality based on the GPCI adjustment factors.

How many square centimeters does CPT 15100 cover?

CPT 15100 covers the first 100 square centimeters or less of split-thickness skin grafting. For each additional 100 square centimeters or portion thereof, you must use add-on code 15101. Accurate measurement and documentation of total graft size is essential for correct billing.

What body areas are included in CPT 15100?

CPT 15100 applies to split-thickness skin grafts on the trunk, arms, and legs. Grafts performed on the scalp, face, eyelids, mouth, neck, ears, orbits, hands, feet, and genitalia require different codes (15120-15121) and should not be billed with 15100.

Can I bill CPT 15100 with debridement codes?

Yes, but documentation must clearly show distinct separate services. The debridement must be performed at a different anatomical site or represent significantly more work than normal graft site preparation. Append modifier 59 to 15100 and provide detailed operative notes showing both procedures were medically necessary and distinct to avoid bundling denials.

What is the difference between 15100 and 15120?

CPT 15100 is for split-thickness grafts on trunk, arms, and legs, while 15120 covers face, scalp, eyelids, mouth, neck, ears, orbits, genitalia, hands, feet, and multiple digits. Code 15120 has higher RVUs (12.43 work RVU versus 9.9 for 15100) due to increased complexity and cosmetic considerations in these anatomical areas.

How do I calculate square centimeters for billing 15100?

Measure the length and width of the grafted area in centimeters and multiply to get square centimeters. For irregular shapes, use the longest length times the widest width, or divide the area into geometric sections and sum them. Document your measurement method clearly in the operative note. Round up partial units when billing 15101 for additional square centimeters.

What documentation prevents denials for CPT 15100?

Include precise wound measurements in square centimeters, specific anatomical locations of both recipient and donor sites, medical necessity justification (wound etiology, depth, failed conservative treatment), detailed description of graft harvesting and placement technique, fixation method, and any complications. Photographs and diagrams strengthen documentation for high-value claims subject to audit.