HCPCS code Q4309: Wound matrix, per square centimeter2026 Medicare rate & RVUs in Massachusetts
Reports Via Matrix supplied for wound treatment, measured by the square centimeter and billed with the applicable primary application procedure.
Medicare pays $134.00–$151.95 for Q4309 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.
Your location
On this page 9 sections
What Q4309 covers
Q4309 identifies Via Matrix by the area supplied, in square centimeters, for wound treatment. It represents the product rather than the clinician’s wound assessment or the work of applying a graft. Wound care clinicians may use it in outpatient treatment of a wound when Via Matrix is the product selected and the applicable wound procedure is performed.
Report Q4309 only with a primary procedure; CMS treats it as an add-on and places its payment within that procedure’s global period. Select the primary application code according to the treated site and wound area, and document the product used and the area supplied so the reported units can be supported. CMS classifies Q4309 as technical-component-only, with interpretation covered by a separate code. Its physician work RVU is zero; the code accounts for the technical component.
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 Q4309 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston, MA | $151.95 | Unavailable |
| Rest of Massachusetts | $134.00 | Unavailable |
How the Q4309 rate is calculated
Each of Q4309’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 · Q4309
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 Q4309
The CMS indicators that decide how Q4309 is paid alongside other services.
CMS payment indicators · Q4309
Wound matrix, per square centimeter
| 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. |
Q4309 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4308Skin substituteSanopellis, per square centimeter
- Q4308 identifies Sanopellis, while Q4309 identifies Via Matrix. Select the product code that matches the product supplied.
- Q4311Acesso graftPer square centimeter
- Q4311 identifies Acesso rather than Via Matrix. The product used, not just the wound site, determines which code to report.
- Q4310ProcentaPer 100 mg
- Q4310 identifies Procenta and is measured per 100 mg; Q4309 identifies Via Matrix and is measured per square centimeter.
Q4309 billing questions
Can Q4309 be billed by itself?
No. CMS identifies Q4309 as an add-on code that must be reported with a primary procedure.
Which application code should accompany Q4309?
Choose the primary skin-substitute application code based on the treated site and wound area. For example, 15271 and 15273 apply to different site groups.
How are Q4309 units counted?
The code is measured per square centimeter. Document the Via Matrix product and the area supplied to support the units reported.
Does Q4309 include the work of applying the product?
Q4309 identifies the product, not the clinician’s application work. Report the appropriate primary application procedure with it.
How does CMS classify the code’s components?
CMS classifies Q4309 as technical-component-only; interpretation is covered by a separate code. The code has zero physician work RVUs.
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 Q4309 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
Build my fee sheet