HCPCS code Q4115: Skin substitute, alloSkin, per square centimeter2026 Medicare rate & RVUs

Medicare pays $127.26 for Q4115 nationally in the office. Local office rates run $109.31–$183.51.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What Q4115 covers

Q4115 identifies AlloSkin, a human skin allograft product supplied for wound coverage. It may be used by clinicians treating wounds that require biologic skin coverage, including chronic ulcers or surgical wounds. The surgeon, podiatrist, or wound-care clinician applies the product in an outpatient wound-care or surgical setting. This code represents the product, not the work of preparing the wound or applying the graft.

Report Q4115 for the AlloSkin product furnished, using the HCPCS unit measure of one square centimeter and documenting the product, quantity, and treated wound. Pair it with the primary wound-treatment procedure; CMS classifies it as an add-on and places payment within that procedure's global period. This is a technical-component-only code, with interpretation represented by a separate code. The documentation should identify AlloSkin specifically so it is distinguishable from other skin substitute products.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where Q4115 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

Q4115 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the Q4115 rate is calculated

Each of Q4115’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for Q4115

The CMS indicators that decide how Q4115 is paid alongside other services.

Q4115 compared with similar codes

How to choose

Q4123AlloSkin graftMaterial used with graft application

Q4123 identifies AlloSkin RT; Q4115 identifies AlloSkin. Select the code that matches the product furnished.

Q4116Dermal matrixAlloDerm per square centimeter

Q4116 identifies AlloDerm, not AlloSkin. The product name in the record determines which product code applies.

15271Skin substitute graftFirst 25 cm², trunk/limbs

15271 reports the application procedure for skin substitute grafts at specified sites and area ranges. Q4115 identifies the AlloSkin product supplied for that treatment.

Codes related to Q4115

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates