HCPCS code Q4239: Amniotic graft, amnio-Maxx or Lite, per square centimeter2026 Medicare rate & RVUs

Medicare pays $127.26 for Q4239 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 Q4239 covers

Q4239 identifies the Amnio-Maxx or Amnio-Maxx Lite material used in a wound graft application. A wound-care clinician, podiatrist, or surgeon may place the material over a prepared chronic wound, such as a foot or lower-leg ulcer, in a clinic or outpatient procedure setting. The code identifies the product rather than the clinician’s work of applying it.

Select Q4239 only when the treatment record identifies Amnio-Maxx or Amnio-Maxx Lite. Report units in square centimeters, supported by the amount of material used and the documented wound dimensions; the number of wounds alone does not determine units. CMS classifies Q4239 as an add-on code, so it is billed with the primary application procedure and paid within that procedure’s global period. CMS also classifies it as technical-component-only: Q4239 does not represent professional interpretation, which is covered by a separate code.

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 Q4239 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

Q4239 rates by state

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

How the Q4239 rate is calculated

Each of Q4239’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 Q4239

The CMS indicators that decide how Q4239 is paid alongside other services.

Q4239 compared with similar codes

How to choose

Q4238Derm-MaxxPer square centimeter

Both are measured per square centimeter, but Q4238 identifies Derm-Maxx. Choose Q4239 only when the record identifies Amnio-Maxx or Amnio-Maxx Lite.

Q4235Wound tissue productAmniorepair or Altiply

Q4235 identifies AmnioRepair or AltiPly. Select the product code from the documented material, even though both codes use square-centimeter units.

Q4240CorecyteTopical, per 0.5 cc

Q4240 identifies topical-only CoreCyte measured in half-cubic-centimeter units. Q4239 identifies Amnio-Maxx or Amnio-Maxx Lite measured by square centimeter.

Codes related to Q4239

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