$123.31
Q4331 identifies Axolotl graft, while Q4332 identifies Axolotl dualgraft. Use the code for the specific product applied.
On this page
CMS RVU26D · Effective 2026-10-01
Q4331 Wound matrix Medicare reimbursement rates in Arizona
Report Q4331 for each square centimeter of Axolotl graft furnished for wound treatment, alongside the primary procedure for its application. Compare Q4331 office and facility rates across CMS payment localities in Arizona.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for Q4331 in Arizona?
Arizona has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
$123.31
1 of 1 localities have a supported rate.
Payment area: Arizona
One mapped payment locality.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Wound care supply
About Q4331: Axolotl wound matrix, per square centimeter
Report Q4331 for each square centimeter of Axolotl graft furnished for wound treatment, alongside the primary procedure for its application.
Q4331 identifies Axolotl graft, a biologic wound matrix used as a material in wound care. Clinicians may apply it to a prepared wound bed during treatment of a chronic or otherwise difficult-to-heal wound, including in an outpatient wound clinic or a surgical setting. The code represents the specific Axolotl product, not the clinician’s wound assessment or the application service itself.
Report the documented square-centimeter quantity with the primary procedure for applying the graft; CMS treats Q4331 as an add-on, paid within that procedure’s global period. Keep records showing the product used, wound treated, and quantity applied. CMS assigns no physician work RVUs to this product code and classifies it as technical-component-only, with interpretation covered by a separate code. The CMS classification should be followed when determining how the service is represented on the claim.
CMS billing rules for Q4331
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- Professional and technical components
- Technical-component-only code: a separate code covers interpretation.
Where the value comes from
- Work RVU0.00 · 0%
- Practice expense (office) RVU3.81 · 100%
- Malpractice RVU0.00 · 0%
77.4K
Medicare services in 2024 · #641 by national volume
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.
Q4331 compared with similar codes
Office rates for Arizona, from the same CMS release.
$123.31
Q4323 identifies Alloply rather than Axolotl. These product codes are not interchangeable based on wound area.
$123.31
Q4324 identifies Amniotx rather than Axolotl. Select according to the product documented as used.
Compare Q4331 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
1 of 1 payment localities
Arizona →
Office / nonfacility
$123.31
Facility
Unavailable
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for Q4331 in Arizona.
PPRRVU2026_Oct_nonQPP.csv
18,418
- Code
- Q4331
- Physician work
- 0.00
- Practice expense
- 3.81
- Malpractice
- 0.00
GPCI2026.csv
6
- Locality
- Arizona
- Physician work
- 1.000
- Practice expense
- 0.969
- Malpractice
- 0.856
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.00 | × 1.000 | 0.0000 |
| Practice expense | 3.81 | × 0.969 | 3.6919 |
| Malpractice | 0.00 | × 0.856 | 0.0000 |
| Total RVUs | 3.6919 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Arizona$123.31
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0 | 1 |
| Practice expense | 3.81 | 0.969 |
| Malpractice | 0 | 0.856 |
(0 × 1 + 3.81 × 0.969 + 0 × 0.856) × $33.4009 = $123.31
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
Q4331 billing questions
How is Q4331 distinguished from Q4332?
Q4331 identifies Axolotl graft; Q4332 identifies Axolotl dualgraft. Select the code matching the product used, rather than choosing by wound size or location.
Can Q4331 be billed by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure, and payment falls within that procedure’s global period.
What quantity should be reported?
Report the documented square-centimeter quantity of Axolotl graft. The record should support the amount applied to the wound.
Does Q4331 represent the graft application service?
No. Q4331 identifies the Axolotl product; report it with the primary procedure that represents application of the graft.
What documentation supports Q4331?
Document the Axolotl product, the wound treated, and the square-centimeter quantity applied, along with the primary procedure.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
18,415Q4328,,"Most, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,416Q4329,,"Singlay, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,417Q4330,,"Total, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,418Q4331,,"Axolotl graft, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,419Q4332,,"Axolotl dualgraft, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,420Q4333,,"Ardeograft, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,421Q4334,,"Amnioplast 1, per sq cm",A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3Medicare Administrative Contractor (MAC),State,Locality Number,Locality Name,2026 PW GPCI (with 1.0 Floor)***,2026 PE GPCI,2026 MP GPCI
410112,AL,00,ALABAMA,1.000,0.875,0.566
502102,AK,01,ALASKA*,1.500,1.065,0.551
603102,AZ,00,ARIZONA,1.000,0.969,0.856
707102,AR,13,ARKANSAS,1.000,0.859,0.515
801112,CA,54,BAKERSFIELD,1.019,1.096,0.609
901112,CA,55,CHICO,1.017,1.096,0.536