HCPCS code Q4132: Wound matrix, grafix Core or GrafixPL Core2026 Medicare rate & RVUs in Michigan
Reports Grafix Core or GrafixPL Core placental membrane product by square centimeter when supplied for application to a wound with a primary procedure.
Medicare pays $116.19–$122.80 for Q4132 in the office in Michigan, from Rest of Michigan to Detroit, MI. 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 Q4132 covers
Q4132 identifies the Grafix Core or GrafixPL Core placental membrane product supplied for wound treatment. Clinicians such as surgeons, podiatrists, and wound-care providers may use these products during treatment of chronic or other open wounds in office, outpatient, or hospital settings. The code represents the product, not the clinician’s wound assessment or application service.
Report the product with the applicable primary wound-application procedure, using the documented product and square centimeters supplied. The record should identify the Grafix product and support the quantity reported. CMS treats Q4132 as an add-on code: it is billed with a primary procedure and paid within that procedure’s global period. CMS also identifies it as technical-component-only, with interpretation 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 Q4132 pays more and less in Michigan
| Payment locality | Office | Facility |
|---|---|---|
| Detroit, MI | $122.80 | Unavailable |
| Rest of Michigan | $116.19 | Unavailable |
How the Q4132 rate is calculated
Each of Q4132’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 · Q4132
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 Q4132
The CMS indicators that decide how Q4132 is paid alongside other services.
CMS payment indicators · Q4132
Wound matrix, grafix Core or GrafixPL Core
| 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. |
Q4132 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4133Placental tissue productGrafix/Stravix Prime PL per square centimeter
- Use Q4132 for Grafix Core or GrafixPL Core; Q4133 identifies other named Grafix and Stravix products. Choose according to the product supplied.
- Q4124Wound matrixOasis tri-layer product
- Q4124 identifies Oasis tri-layer wound matrix, not a Grafix Core or GrafixPL Core product.
- Q4122Wound matrixDermACELL AWM, per sq cm
- Q4122 identifies DermACELL; Q4132 is specific to Grafix Core or GrafixPL Core.
Q4132 billing questions
Can Q4132 be billed by itself?
No. CMS identifies it as an add-on code, so report it with the applicable primary wound-application procedure.
How should the quantity be reported?
Q4132 is reported per square centimeter. Keep documentation of the Grafix product and the quantity supplied to support the units.
Is Q4132 the wound-application service?
No. It identifies the Grafix Core or GrafixPL Core product; the wound-application service is reported separately with the appropriate primary procedure.
How does Q4132 differ from Q4133?
Q4132 identifies Grafix Core or GrafixPL Core. Q4133 identifies other named products in the Grafix and Stravix family, so select based on the product actually supplied.
Does Q4132 include interpretation?
CMS classifies Q4132 as technical-component-only and states that a separate code covers interpretation.
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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