HCPCS code Q4329: Wound graft, singlay, per square centimeter2026 Medicare rate & RVUs in Georgia
Q4329 reports Singlay wound-graft product by square centimeter when it is used with a primary wound procedure for graft application.
Medicare pays $113.51–$129.29 for Q4329 in the office in Georgia, from Rest of Georgia to Atlanta, GA. 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.
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What Q4329 covers
Q4329 identifies the Singlay wound-graft product supplied for wound coverage; it does not describe the clinician’s application service. Wound-care clinicians and surgeons may use the product during treatment of wounds in settings such as outpatient wound clinics and hospital outpatient departments. The specific product used, rather than wound size alone, determines whether Q4329 is the appropriate product code.
Report Q4329 only with a primary procedure, such as the applicable skin-substitute application code selected for the wound site and treated area. The quantity is reported by square centimeter, so documentation should identify Singlay and support the amount used, including the product dimensions and treated wound. CMS classifies Q4329 as technical-component-only, with interpretation covered by a separate code. Payment for this add-on falls within the primary procedure’s global period.
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 Q4329 pays more and less in Georgia
| Payment locality | Office | Facility |
|---|---|---|
| Atlanta, GA | $129.29 | Unavailable |
| Rest of Georgia | $113.51 | Unavailable |
How the Q4329 rate is calculated
Each of Q4329’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 · Q4329
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 Q4329
The CMS indicators that decide how Q4329 is paid alongside other services.
CMS payment indicators · Q4329
Wound graft, singlay, 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. |
Q4329 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 15271Skin substitute graftFirst 25 cm², trunk/limbs
- Code 15271 reports the application service for qualifying wounds on the trunk, arms, or legs. Q4329 reports the Singlay product used with a primary application procedure.
- 15275Skin substituteFace and other specified sites
- Code 15275 reports application for qualifying wounds on specified smaller or specialized body sites. Q4329 identifies the product, not the application site or service.
- Q4330Wound graftTotal, per square centimeter
- Q4330 identifies Total rather than Singlay. Select the product code that matches the wound-graft product actually used.
Q4329 billing questions
When should Q4329 be chosen over another wound-graft product code?
Use Q4329 when the product applied is Singlay. A different named product, such as Most or Total, has its own product code.
Can Q4329 be reported by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure.
Which application code is reported with Q4329?
Use the skin-substitute application code that matches the treated body site and area, such as 15271 for qualifying wounds on the trunk, arms, or legs.
How is the quantity for Q4329 counted?
The code is measured per square centimeter. Record the Singlay product dimensions and the amount used so the reported quantity is supported.
Is interpretation included in Q4329?
CMS classifies Q4329 as technical-component-only and indicates that a separate code covers interpretation.
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
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