HCPCS Q4136: Wound matrixMedicare rate & RVUs in Massachusetts
Q4136 represents EzDerm, a porcine-derived wound matrix reported for the product used with a primary wound procedure, such as skin substitute application.
Medicare pays $134.00–$151.95 for Q4136 in the office in Massachusetts, from Rest Of Massachusetts to Metropolitan Boston. 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.
On this page 9 sections
What Q4136 covers
Q4136 identifies EzDerm, a porcine-derived acellular dermal matrix supplied as a wound covering. It may be used in wound care, including selected partial-thickness burns and skin-graft donor sites. The code represents the product, not the clinician’s wound preparation or application service. Wound-care clinicians and surgeons may use the matrix in an office, outpatient department, or other surgical setting, depending on the patient’s treatment plan.
Report Q4136 only with a primary procedure; CMS treats it as an add-on and includes its payment within that procedure’s global period. The product is measured per square centimeter, so documentation should identify EzDerm and the amount used, along with the wound site and the associated procedure. CMS classifies Q4136 as technical-component-only; a separate code covers interpretation. The reported product quantity should be supported by the operative or treatment record.
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 Q4136 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston | $151.95 | Unavailable |
| Rest Of Massachusetts | $134.00 | Unavailable |
How the Q4136 rate is calculated
Each of Q4136’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 · Q4136
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 Q4136
The CMS indicators that decide how Q4136 is paid alongside other services.
CMS payment indicators · Q4136
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. |
Q4136 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4135Skin substitute
- Q4135 identifies MediSkin, whereas Q4136 identifies EzDerm. Select the code by the product used, not by the wound site alone.
- Q4137Wound matrix
- Q4137 identifies AmnioExcel or Biodexcel; Q4136 identifies EzDerm. These product codes are not interchangeable.
- 15271Skin substitute graft
- 15271 reports the primary skin-substitute application service for qualifying trunk, arm, or leg wounds. Q4136 reports the EzDerm product used with a primary procedure.
Q4136 billing questions
Is Q4136 the wound application procedure?
No. Q4136 represents the EzDerm product. Report the applicable primary procedure for the wound treatment separately.
Can Q4136 be billed by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure.
How should the amount of EzDerm be documented?
Record the amount used in square centimeters, identify the wound site, and link the product to the primary procedure in the treatment or operative record.
Does Q4136 include interpretation?
No. CMS classifies Q4136 as technical-component-only, with interpretation covered by a separate code.
How does Q4136 differ from Q4137?
Q4136 identifies EzDerm. Q4137 identifies AmnioExcel or Biodexcel, so choose the product code that matches the material supplied.
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
Show the CMS file lines behind this rate
Fee sheets
Put Q4136 and the rest of your codes on one sheet
Build a fee sheet from your own code list at your locality, put your payer contracts beside Medicare, and see what changed each quarter.
Build my fee sheetOr price your code list free →