HCPCS code Q4329: Wound graft, singlay, per square centimeter2026 Medicare rate & RVUs

Medicare pays $127.26 for Q4329 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 Q4329 covers

Q4329 identifies the Singlay wound-graft product supplied for wound coverage; it does not describe the clinician’s application service. Wound-care clinicians and surgeons may use the product during treatment of wounds in settings such as outpatient wound clinics and hospital outpatient departments. The specific product used, rather than wound size alone, determines whether Q4329 is the appropriate product code.

Report Q4329 only with a primary procedure, such as the applicable skin-substitute application code selected for the wound site and treated area. The quantity is reported by square centimeter, so documentation should identify Singlay and support the amount used, including the product dimensions and treated wound. CMS classifies Q4329 as technical-component-only, with interpretation covered by a separate code. Payment for this add-on falls within the primary procedure’s global period.

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 Q4329 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

Q4329 rates by state

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

How the Q4329 rate is calculated

Each of Q4329’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 Q4329

The CMS indicators that decide how Q4329 is paid alongside other services.

Q4329 compared with similar codes

How to choose

15271Skin substitute graftFirst 25 cm², trunk/limbs

Code 15271 reports the application service for qualifying wounds on the trunk, arms, or legs. Q4329 reports the Singlay product used with a primary application procedure.

15275Skin substituteFace and other specified sites

Code 15275 reports application for qualifying wounds on specified smaller or specialized body sites. Q4329 identifies the product, not the application site or service.

Q4330Wound graftTotal, per square centimeter

Q4330 identifies Total rather than Singlay. Select the product code that matches the wound-graft product actually used.

Codes related to Q4329

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