HCPCS Q4357: Wound matrixMedicare rate & RVUs in Illinois
Q4357 reports the Xwrap Plus wound matrix by square centimeter when supplied with a primary wound procedure for application to a prepared wound bed.
Medicare pays $116.19–$130.69 for Q4357 in the office in Illinois, from Rest Of Illinois to Suburban Chicago. 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 Q4357 covers
Q4357 identifies the Xwrap Plus wound matrix supplied for application to a prepared wound bed; it reports the product, not the wound-preparation or application work. A wound-care clinician or surgeon may use it during treatment of a wound such as a chronic lower-extremity ulcer. The application procedure and the product are represented separately on the claim, with the product quantity reported in square centimeters.
Report Q4357 only with a primary procedure, as CMS classifies it as an add-on code paid within that procedure’s global period. Documentation should identify Xwrap Plus, the wound site, the amount used, and the associated primary procedure; select the application code according to the treated body area and wound area. CMS classifies Q4357 as technical-component-only, with a separate code covering interpretation.
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 Q4357 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
4 payment localities
$116.19 to $130.69
| Payment locality | Office | Facility |
|---|---|---|
| Chicago | $127.89 | Unavailable |
| East St. Louis | $117.08 | Unavailable |
| Rest Of Illinois | $116.19 | Unavailable |
| Suburban Chicago | $130.69 | Unavailable |
How the Q4357 rate is calculated
Each of Q4357’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 · Q4357
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 Q4357
The CMS indicators that decide how Q4357 is paid alongside other services.
CMS payment indicators · Q4357
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. |
Q4357 compared with similar codes
Compare codes
Q4357 vs Q4358 vs 15271 vs 15273: national Medicare rates
Swap in your local Medicare rate.
How to choose
- Q4358Wound product
- Q4358 identifies Xwrap Dual; Q4357 identifies Xwrap Plus. Select the product code that matches the product used.
- 15271Skin substitute graft
- billing code 15271 reports the application procedure for the trunk, arms, or legs. Q4357 reports the Xwrap Plus product supplied with the procedure.
- 15273Skin substitute graft
- billing code 15273 is the application procedure for the feet. Q4357 identifies the product and is not selected based on the wound’s body site.
Q4357 billing questions
Can Q4357 be billed by itself?
No. CMS identifies Q4357 as an add-on code that must be billed with a primary procedure.
How should the quantity be reported?
Report the amount of Xwrap Plus in square centimeters, consistent with the product used and the supporting documentation.
Which code reports the application?
Report the applicable wound-application procedure separately. For example, billing code 15271 covers application to the trunk, arms, or legs; the correct code depends on the treated body area and wound area.
Is Q4357 a professional interpretation service?
No. CMS classifies it as technical-component-only and indicates that a separate code covers interpretation.
How does Q4357 differ from Q4358?
Q4357 identifies Xwrap Plus, while Q4358 identifies Xwrap Dual. Use the code matching the product supplied and documented.
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
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