HCPCS code Q4124: Wound matrix, oasis tri-layer product2026 Medicare rate & RVUs in Massachusetts
Reports Oasis tri-layer wound matrix supplied for wound treatment, alongside the primary procedure that applies the matrix to the wound.
Medicare pays $134.00–$151.95 for Q4124 in the office in Massachusetts, from Rest of Massachusetts to Metropolitan Boston, MA. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What Q4124 covers
Q4124 identifies the Oasis tri-layer wound matrix, a porcine small-intestinal-submucosa product applied to a prepared wound bed. Wound care clinicians, surgeons, and podiatrists may use it for wounds such as diabetic foot ulcers or venous leg ulcers when a matrix is selected as part of treatment. The product is generally supplied and applied in outpatient wound clinics, physician offices, or hospital outpatient departments.
Report the product code with the primary skin-substitute application procedure, using the product’s billed unit of measure, per square centimeter. Documentation should identify the Oasis tri-layer product, wound site, amount applied, and the associated application procedure. CMS classifies Q4124 as an add-on code: it is billed only with a primary procedure, and payment falls within that procedure’s global period. It is also technical-component-only; a separate code covers interpretation. Q4124 represents the product, not the clinician’s wound assessment or the application service.
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 Q4124 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston, MA | $151.95 | Unavailable |
| Rest of Massachusetts | $134.00 | Unavailable |
How the Q4124 rate is calculated
Each of Q4124’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.
How the rate is built · Q4124
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense3.81
3.81 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
3.8100
Conversion factor
$33.4009
Medicare rate
$127.26
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for Q4124
The CMS indicators that decide how Q4124 is paid alongside other services.
CMS payment indicators · Q4124
Wound matrix, oasis tri-layer product
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 3 | Technical component only. |
Q4124 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 15271Skin substitute graftFirst 25 cm², trunk/limbs
- 15271 reports the application procedure for qualifying trunk, arm, or leg wounds; Q4124 reports the Oasis matrix product supplied with a primary procedure.
- Q4121Skin substituteTheraSkin per square centimeter
- Q4121 identifies TheraSkin. Use Q4124 only when Oasis tri-layer wound matrix is the product supplied.
- Q4122Wound matrixDermACELL AWM, per sq cm
- Q4122 identifies Dermacell AWM. The product documented and supplied determines whether Q4122 or Q4124 is reported.
Q4124 billing questions
Is Q4124 the wound application procedure?
No. Q4124 reports the Oasis tri-layer matrix product; report the applicable primary skin-substitute application procedure separately.
What unit is reported?
The unit is one square centimeter. Documentation should support the quantity of Oasis matrix supplied and applied.
Can Q4124 be billed by itself?
No. CMS identifies it as an add-on code billed only with a primary procedure, with payment within that procedure’s global period.
Does Q4124 include interpretation?
No. CMS classifies Q4124 as technical-component-only; a separate code covers interpretation.
How is Q4124 distinguished from another wound matrix code?
Select Q4124 when the documented product is Oasis tri-layer wound matrix. Other product-specific codes identify different matrices or skin substitutes.
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
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