CPT 11045Surgery

Dbrdmt subq tiss each addl

CPT code 11045 covers the removal of dead, damaged, or infected tissue (debridement) beneath the skin for each additional 20 square centimeters after the first area. This is an add-on code that cannot be billed alone and must accompany a primary debridement procedure.

Showing rates for

National Average

Base Medicare rate

$38.49

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

0.5

PE RVU (NF)

0.62

MP RVU

0.07

Total RVU

1.19

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

NCCI bundling edits

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Billing tips

Always bill 11045 with a primary debridement code (11042, 11043, or 11044) - it cannot be billed alone as a standalone service
Impact: Prevents automatic denial; 11045 is designated as an add-on code (+) in CPT and will reject without primary code
Accurately measure and document each 20 sq cm increment of subcutaneous tissue debrided; round up partial increments (e.g., 35 sq cm = 2 units of add-on code)
Impact: Each properly documented unit adds $38.49 non-facility or $23.94 facility; undermeasurement leaves money on table
Document the specific depth of debridement (subcutaneous) separately from dermis or muscle/fascia; only subcutaneous tissue qualifies for 11045
Impact: Prevents downcoding to lower-paying dermal codes or upcoding denials; ensures correct code assignment for tissue depth
Bill the highest level depth code as primary (11042-11044) and use corresponding add-on codes for that depth only; do not mix depth levels in add-on billing
Impact: Medicare requires primary code at deepest level; incorrect sequencing can trigger $38.49+ per unit denials
When debriding multiple wounds, calculate total surface area per depth level across all wounds before determining unit count
Impact: Cumulative measurement across multiple sites maximizes reimbursement; three 15 sq cm wounds = 2 units of 11045
Verify facility vs non-facility status; place of service directly impacts rate ($38.49 vs $23.94) and ensure proper POS code on claim
Impact: Incorrect POS code triggers $14.55 (38%) payment difference and potential recoupment

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Frequently asked questions

What is CPT code 11045 used for?

CPT 11045 is an add-on code for debridement of subcutaneous tissue (including epidermis and dermis if performed) for each additional 20 square centimeters beyond the first area. It must be billed with a primary debridement code and represents removal of dead or infected tissue beneath the skin layer.

How much does Medicare pay for CPT 11045 in 2025?

Medicare pays $38.49 for CPT 11045 in non-facility settings and $23.94 in facility settings based on the 2025 Physician Fee Schedule. The code has 1.19 total RVUs (0.5 work RVU, 0.62 non-facility PE RVU, 0.07 MP RVU).

Can CPT 11045 be billed alone without other codes?

No, CPT 11045 is an add-on code (designated with a + symbol in CPT) and cannot be billed alone. It must be reported with a primary debridement code: 11042 (subcutaneous tissue, first 20 sq cm), 11043 (muscle/fascia, first 20 sq cm), or 11044 (bone, first 20 sq cm).

How do you calculate units for CPT 11045?

Count each additional 20 square centimeters (or portion thereof) of subcutaneous tissue debrided beyond the first 20 sq cm. For example, 55 sq cm total = 1 unit of primary code (11042) plus 2 units of 11045. Measure the total surface area across all wounds at the same tissue depth and round up partial increments.

What is the difference between CPT 11042 and 11045?

CPT 11042 is the primary code for the first 20 square centimeters of subcutaneous tissue debridement, while 11045 is the add-on code for each additional 20 sq cm beyond the first area. You must bill 11042 first, then add units of 11045 for additional surface area at the same tissue depth.

What modifiers are commonly used with CPT 11045?

Modifier 59 is commonly used when debriding distinctly separate wounds or anatomic sites. Modifiers 78 and 79 apply during postoperative periods for related or unrelated procedures. Laterality modifiers (LT/RT) may be required for bilateral procedures. Modifier 51 is typically not needed as CPT exempts add-on codes from multiple procedure rules.

What documentation is required to bill CPT 11045?

Documentation must include precise measurements in square centimeters, specific anatomic locations, tissue depth confirming subcutaneous level, medical necessity, debridement technique, and the number of additional 20 sq cm increments. The operative note must support both the primary debridement code and each unit of 11045 billed.