HCPCS Q4285: Wound matrixMedicare rate & RVUs in Alaska
Reports Nu-Dyn DL or DL Mesh by square centimeter when the wound matrix is used with a primary wound application procedure.
Medicare pays $135.53 for Q4285 in the office in Alaska (Alaska*). 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 Q4285 covers
Q4285 identifies Nu-Dyn DL or DL Mesh wound matrix by square centimeter for use with a wound-coverage procedure. The material is supplied for placement on a prepared wound bed in settings such as outpatient wound clinics, hospital outpatient departments, or surgical facilities. Wound-care physicians, surgeons, and podiatrists may use it when a graft or matrix application is selected; the product code is distinct from the clinician’s application service.
Report the measured square-centimeter quantity of the documented product with the applicable primary application procedure, not as a standalone service. The record should identify the product, wound site, treated surface area, amount used, and associated procedure. CMS classifies Q4285 as an add-on billed only with a primary procedure and paid within that procedure’s global period. It is technical-component only; a separate code covers interpretation. Select the primary application code based on the procedure performed and applicable site and wound-area criteria.
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.
Q4285 in Alaska*
| Payment locality | Office | Facility |
|---|---|---|
| Alaska* | $135.53 | Unavailable |
How the Q4285 rate is calculated
Each of Q4285’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 · Q4285
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.00Practice expense 3.81Malpractice 0.00
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for Q4285
The CMS indicators that decide how Q4285 is paid alongside other services.
CMS payment indicators · Q4285
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. |
Q4285 compared with similar codes
Compare codes
Q4285 vs Q4286 vs Q4287 vs 15271: national Medicare rates
Swap in your local Medicare rate.
How to choose
- Q4286Wound product
- Q4286 identifies Nu-Dyn SL or SLW; Q4285 identifies Nu-Dyn DL or DL Mesh. Use the code matching the product documented.
- Q4287Wound product
- Q4287 identifies Dermabind DL, while Q4285 identifies Nu-Dyn DL or DL Mesh. These are distinct products, not interchangeable code labels.
- 15271Skin substitute graft
- 15271 reports an applicable wound application procedure; Q4285 reports the Nu-Dyn product used with a primary procedure.
Q4285 billing questions
Can Q4285 be billed without a primary procedure?
No. CMS identifies Q4285 as an add-on that must be billed with a primary procedure; it is not a standalone service.
Does Q4285 represent the wound application itself?
No. It identifies the Nu-Dyn DL or DL Mesh product by square centimeter. Report the applicable application procedure separately.
How should the quantity be documented?
Document the product used and the measured square-centimeter quantity, along with the wound site, treated area, and associated procedure.
How is Q4285 different from Q4286?
Q4285 identifies Nu-Dyn DL or DL Mesh; Q4286 identifies Nu-Dyn SL or SLW. Match the reported code to the product documented.
What does technical-component-only mean for this code?
CMS classifies Q4285 as technical-component-only, with interpretation covered by a separate code.
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 Q4285 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 →