HCPCS code Q4102: Wound matrix, oasis wound matrix2026 Medicare rate & RVUs in California
Reports Oasis wound matrix used to cover a wound, typically alongside a skin substitute application procedure for a chronic ulcer.
Medicare pays $139.47–$183.51 for Q4102 in the office in California, from Bakersfield, CA to Santa Clara County, CA. 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 Q4102 covers
Oasis wound matrix is a porcine small-intestinal-submucosa product used as a wound covering, including in treatment of chronic wounds such as diabetic foot and venous leg ulcers. A physician or other qualified clinician applies it in a wound-care setting; the product code represents the matrix, not the clinical work of preparing and applying it.
Report Q4102 only with the primary procedure for application, selecting that procedure by the treated body site and wound area. Report the matrix in units corresponding to the amount used, and document the wound, its location and dimensions, and the product applied. CMS treats this as an add-on code paid within the primary procedure’s global period. It is also designated technical-component-only, with interpretation covered by a separate code when applicable.
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 Q4102 pays more and less in California
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
29 payment localities
$139.47 to $183.51
29 of 29 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Bakersfield, CA | $139.47 | Unavailable |
| Chico, CA | $139.47 | Unavailable |
| El Centro, CA | $139.47 | Unavailable |
| Fresno, CA | $139.47 | Unavailable |
| Hanford, CA | $139.47 | Unavailable |
| Los Angeles, CA | $150.55 | Unavailable |
| Madera, CA | $139.47 | Unavailable |
| Marin County, CA | $179.43 | Unavailable |
| Merced, CA | $139.47 | Unavailable |
| Modesto, CA | $139.47 | Unavailable |
| Napa, CA | $167.73 | Unavailable |
| Oxnard, CA | $150.42 | Unavailable |
| Redding, CA | $139.47 | Unavailable |
| Rest of California | $139.47 | Unavailable |
| Riverside, CA | $139.47 | Unavailable |
| Sacramento, CA | $148.00 | Unavailable |
| Salinas, CA | $147.49 | Unavailable |
| San Benito County, CA | $183.51 | Unavailable |
| San Diego, CA | $152.20 | Unavailable |
| San Francisco, CA | $179.43 | Unavailable |
| San Luis Obispo, CA | $144.95 | Unavailable |
| Santa Clara County, CA | $183.51 | Unavailable |
| Santa Cruz, CA | $154.62 | Unavailable |
| Santa Maria, CA | $148.38 | Unavailable |
| Santa Rosa, CA | $156.27 | Unavailable |
| Stockton, CA | $139.47 | Unavailable |
| Vallejo, CA | $167.73 | Unavailable |
| Visalia, CA | $139.47 | Unavailable |
| Yuba City, CA | $139.47 | Unavailable |
How the Q4102 rate is calculated
Each of Q4102’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 · Q4102
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 Q4102
The CMS indicators that decide how Q4102 is paid alongside other services.
CMS payment indicators · Q4102
Wound matrix, oasis wound matrix
| 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. |
Q4102 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4103Burn matrixOasis product
- Q4103 identifies Oasis burn matrix; Q4102 identifies Oasis wound matrix. Match the claim to the specific product applied.
- Q4124Wound matrixOasis tri-layer product
- Q4124 identifies Oasis tri-layer wound matrix. Q4102 is the Oasis wound matrix product code, not the tri-layer product code.
- 15271Skin substitute graftFirst 25 cm², trunk/limbs
- 15271 reports the application procedure for its applicable sites and area range; Q4102 reports the Oasis matrix product used with a primary procedure.
Q4102 billing questions
Can Q4102 be billed by itself?
No. CMS identifies it as an add-on code, so it is reported with a primary procedure, such as the appropriate skin substitute application service.
How is Q4102 different from Q4103?
Q4102 identifies Oasis wound matrix, while Q4103 identifies Oasis burn matrix. Use the product code that matches the matrix applied.
How should the units be supported?
Document the wound dimensions, product used, and amount applied. Q4102 is reported by the area unit for the matrix.
Does Q4102 include the application work?
No. Q4102 identifies the matrix product; report the appropriate primary procedure for the application service.
What does the technical-component-only designation mean?
CMS classifies Q4102 as technical-component-only; interpretation is represented by a separate code when applicable.
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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