CPT 15221Surgery

Fth/gft fr s/a/l each addl

CPT 15221 is an add-on code for each additional full-thickness skin graft taken from the scalp, arms, or legs beyond the first graft. It covers the extra work of harvesting and preparing additional donor tissue for reconstructive procedures.

Showing rates for

National Average

Base Medicare rate

$123.24

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

1.19

PE RVU (NF)

2.41

MP RVU

0.21

Total RVU

3.81

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

NCCI bundling edits

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Billing tips

Always bill 15221 with a primary full-thickness graft code (15220, 15240, or 15260) - this add-on code cannot stand alone and will auto-deny without proper parent code
Impact: Prevents 100% claim denial; ensures baseline $123.24 payment per additional graft
Document exact square centimeter measurements for each graft site in operative notes, especially for pediatric patients where unit calculation differs from adults
Impact: Proper documentation supports multiple units billing; each additional 20 sq cm justifies another $123.24 in pediatric cases
Note the significant 85% payment difference between facility ($66.63) and non-facility ($123.24) settings - verify place of service code accuracy
Impact: Incorrect POS code can result in $56.61 underpayment or overpayment requiring refund
Report each separate donor site individually when multiple areas are harvested (e.g., one from left arm, one from right arm) rather than combining measurements
Impact: Maximizes appropriate reimbursement by capturing all work performed; can add $123.24 per documented site
For Medicare claims, ensure the primary code is sequenced first followed by 15221 to avoid NCCI bundling edits and processing delays
Impact: Proper sequencing prevents automatic claim suspension and accelerates payment by 15-30 days
Include photographs of donor sites with measurements when available - visual documentation significantly reduces post-payment audits and recoupment demands
Impact: Reduces audit risk from High to Medium-Low; protects against potential 100% recoupment in RAC audits

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Frequently asked questions

What is the difference between CPT 15221 and 15220?

CPT 15220 is the primary code for the first full-thickness skin graft from scalp, arms, or legs (up to 20 sq cm in infants/children, or first graft in adults), while 15221 is an add-on code for each additional graft site or additional 20 sq cm. You must bill 15220 first, then add 15221 for each additional graft harvested during the same session. The 2025 Medicare rate for 15221 is $123.24 non-facility compared to a higher rate for the primary 15220 code.

Can CPT 15221 be billed alone?

No, CPT 15221 cannot be billed alone. It is an add-on code (designated by the + symbol in CPT manual) that must be reported with a primary full-thickness graft code such as 15220, 15240, or 15260. Billing 15221 without a primary code will result in automatic claim denial. Always ensure the primary graft code appears first on the claim form.

How much does Medicare pay for CPT 15221 in 2025?

In 2025, Medicare pays $123.24 for CPT 15221 in non-facility settings and $66.63 in facility settings (national average rates). The code has a total RVU of 3.81 (1.19 work RVU, 2.41 non-facility PE RVU, 0.21 MP RVU) multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary based on geographic locality adjustments.

How many times can you bill CPT 15221?

You can bill CPT 15221 multiple times per operative session, once for each additional full-thickness graft site beyond the first. There is no Medicare-imposed maximum, but each unit must be medically necessary and fully documented with specific anatomic locations and measurements. For pediatric patients, bill one unit per additional 20 square centimeters. Excessive units without proper documentation will trigger audit flags.

What modifier should be used with CPT 15221?

CPT 15221 typically does not require modifier 51 (multiple procedures) since it is an add-on code exempt from multiple procedure reductions. However, modifier 59 may be necessary if billed with other procedures that have NCCI edits, modifier 22 for unusual complexity, or modifier 78 for related procedures during the postoperative period. Laterality modifiers (LT/RT) may be appropriate for tracking donor site location but do not affect reimbursement.

What is the RVU for CPT code 15221?

CPT 15221 has a total RVU of 3.81 for 2025, consisting of 1.19 work RVU, 2.41 practice expense RVU (non-facility), 0.66 practice expense RVU (facility), and 0.21 malpractice RVU. These values are from the CMS Medicare Physician Fee Schedule RVU25A released December 23, 2024. The work RVU of 1.19 reflects the incremental physician effort for each additional graft harvest.

What diagnosis codes are typically used with CPT 15221?

CPT 15221 is typically billed with diagnosis codes indicating the reason for skin grafting, such as burn injury codes (T20-T25 series), traumatic wound codes, skin cancer excision aftercare (Z48.817), chronic ulcers (L97-L98), or congenital skin defects. The diagnosis must support medical necessity for multiple full-thickness grafts. Always code the recipient site condition, not the donor site, as the primary diagnosis. Documentation must clearly link the additional grafts to the documented condition.