HCPCS Q4123: AlloSkin graftMedicare rate & RVUs

Medicare pays $127.26 for Q4123 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 Q4123 covers

Q4123 identifies AlloSkin material used to cover a wound during a graft application. A clinician, such as a surgeon or wound-care physician, prepares the wound bed and places the material in a clinic or surgical setting. A lower-leg ulcer requiring graft coverage is a typical context. This code identifies the AlloSkin material, not the clinician’s work of preparing the wound and applying the graft.

Report Q4123 with the primary procedure that describes the application; CMS designates it an add-on code and pays it within the primary procedure’s global period. The record should identify AlloSkin, the wound site, the amount used, and the application performed. Select the application code from the treated body site and wound area rather than from the product name. CMS classifies Q4123 as technical-component-only; a separate code covers interpretation when an interpretation service is reported. Q4115 also carries an AlloSkin short label, so the short descriptor alone cannot resolve which product code belongs on a claim.

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 Q4123 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

Q4123 rates by state

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

How the Q4123 rate is calculated

Each of Q4123’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 Q4123

The CMS indicators that decide how Q4123 is paid alongside other services.

Q4123 compared with similar codes

How to choose

Q4115Skin substitute

Both codes have an AlloSkin short label. Do not choose between them from the abbreviated descriptor alone; verify the applicable product coding details.

Q4121Skin substitute

Use Q4123 for AlloSkin material and Q4121 for TheraSkin material; select by the product actually applied.

15271Skin substitute graft

Q4123 identifies AlloSkin material. 15271 describes application of a skin substitute graft to a qualifying wound on the trunk, arms, or legs.

Codes related to Q4123

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