HCPCS code Q4137: Wound matrix2026 Medicare rate & RVUs in Guam
Reports AmnioExcel or BioDExcel amniotic tissue matrix by area when supplied for wound coverage with a separately coded application procedure.
Medicare pays $144.69 for Q4137 in the office in Guam (Hawaii, Guam). 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 Q4137 covers
Q4137 represents AmnioExcel or BioDExcel, an amniotic tissue matrix supplied for placement over a wound. It may be used in outpatient wound care, including treatment of chronic ulcers such as diabetic foot or venous leg ulcers. The clinician assesses the wound and prepares and applies the material; the product code accounts for the matrix, not the work of applying it.
Report the quantity in square centimeters of product used and pair Q4137 with the applicable primary wound-application procedure. The record should identify the product, treated wound, amount used, and application procedure. CMS classifies Q4137 as an add-on code: it is billed only 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.
Q4137 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $144.69 | Unavailable |
How the Q4137 rate is calculated
Each of Q4137’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 · Q4137
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 Q4137
The CMS indicators that decide how Q4137 is paid alongside other services.
CMS payment indicators · Q4137
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. |
Q4137 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4138Wound matrix
- Q4137 identifies AmnioExcel or BioDExcel matrix; Q4138 identifies BioDFence DryFlex. Select the code matching the product supplied.
- Q4139Amnio or biodmatrix, inj 1cc
- Q4139 identifies an injectable amniotic or BioDMatrix product and is measured by volume. Q4137 is for the AmnioExcel or BioDExcel matrix measured by area.
- Q4133Placental tissue product
- Q4133 identifies Grafix products, while Q4137 identifies AmnioExcel or BioDExcel. The product used, not wound location alone, distinguishes the supply code.
Q4137 billing questions
How is Q4137 different from a wound-application code?
Q4137 reports the AmnioExcel or BioDExcel material by area. Report the applicable primary procedure separately for the clinician’s wound preparation and application service.
What quantity should be reported?
Report the square centimeters of product used. Document the amount applied to the wound and the product identity.
Can Q4137 be billed by itself?
No. CMS classifies it as an add-on code, so it must be reported with a primary procedure and is paid within that procedure’s global period.
Does Q4137 include interpretation?
No. CMS identifies Q4137 as technical-component-only; a separate code covers interpretation.
How should the record support Q4137?
Document the wound treated, the AmnioExcel or BioDExcel product used, the area applied, and the associated primary application 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 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 Q4137 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 →