HCPCS Q4429: DermBnd skin substituteMedicare rate & RVUs in Florida
Q4429 reports each square centimeter of DermBnd CHN or CHX supplied for a skin substitute application to a wound.
Medicare pays $121.66–$132.47 for Q4429 in the office in Florida, from Rest Of Florida to Miami. 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 Q4429 covers
Q4429 identifies the DermBnd CHN or CHX product used when a clinician applies a skin substitute to a wound. It is a product code measured by area, rather than a code for the clinician’s application work. The product variant matters: other DermBnd variants have their own codes, so the product record should identify CHN or CHX.
Report units in square centimeters of DermBnd CHN or CHX used, supported by the product label, area measurement, wound site, and application record. CMS classifies Q4429 as an add-on code, so it must accompany a primary procedure and is paid within that procedure’s global period. CMS also designates it as technical-component-only; a separate code covers interpretation. The primary procedure documents the application, while Q4429 identifies the particular product and quantity.
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 Q4429 pays more and less in Florida
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$121.66 to $132.47
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale | $128.91 | Unavailable |
| Miami | $132.47 | Unavailable |
| Rest Of Florida | $121.66 | Unavailable |
How the Q4429 rate is calculated
Each of Q4429’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 · Q4429
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 Q4429
The CMS indicators that decide how Q4429 is paid alongside other services.
CMS payment indicators · Q4429
DermBnd skin substitute
| 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. |
Q4429 compared with similar codes
Compare codes
Q4429 vs Q4426 vs Q4427 vs Q4428: national Medicare rates
Swap in your local Medicare rate.
How to choose
- Q4426Skin substitute
- Both are DermBnd product codes measured per square centimeter. Choose Q4426 for TL+ or TLX; choose Q4429 for CHN or CHX.
- Q4427Skin substitute
- Q4427 identifies the DLN, DL+, or DLX DermBnd variants. Q4429 identifies CHN or CHX.
- Q4428DermBnd skin substitute
- Q4428 identifies the SLN, SL+, or SLX DermBnd variants. Q4429 identifies CHN or CHX.
Q4429 billing questions
When is Q4429 chosen instead of another DermBnd code?
Use Q4429 when the product documentation identifies DermBnd CHN or CHX. The other DermBnd codes in this series identify different named variants.
How are Q4429 units determined?
Each unit represents one square centimeter. Support the reported quantity with the product and area documented for the application.
Can Q4429 be reported without an application procedure?
No. CMS designates Q4429 an add-on code that must be reported with a primary procedure.
Does Q4429 have its own global period?
CMS pays Q4429 within the primary procedure’s global period.
Does Q4429 include interpretation?
No. CMS designates Q4429 as technical-component-only and identifies a separate code for 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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