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HCPCS Q4429: DermBnd skin substituteMedicare rate & RVUs

Q4429 reports each square centimeter of DermBnd CHN or CHX supplied for a skin substitute application to a wound.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $127.26 for Q4429 nationally in the office. Local office rates run $109.31–$183.51.

Medicare rate · Q4429

DermBnd skin substitute

Swap in your local Medicare rate.

Work RVUs
0
Total RVUs
3.81
Global days
ZZZ

National rate · 2026

$127.26

Office setting, before claim adjustments.

See every locality for Q4429 → · Billed by an NP, PA or therapist? →

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 10 sections
  1. Medicare rate
  2. What Q4429 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 payment localities

$109.31 to $183.51

$109.31$146.41$183.51
One dot per payment locality, office / nonfacility. Hover a dot to see the locality; select it to open that rate.

109 of 109 payment localities

Q4429 office and facility rates by payment locality
Payment localityOfficeFacility
Alabama$111.35Unavailable
Alaska*$135.53Unavailable
Arizona$123.31Unavailable
Arkansas$109.31Unavailable
Atlanta$129.29Unavailable
Austin$134.64Unavailable
Bakersfield$139.47Unavailable
Baltimore/Surr. Cntys$136.55Unavailable
Beaumont$115.80Unavailable
Brazoria$126.11Unavailable

Q4429 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$109.31

$161.49

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
Q4429 office rate range by state
State / territoryOffice rate rangeLocalities
AK$135.531
AL$111.351
AR$109.311
AZ$123.311
CA$139.47–$183.5129
CO$135.401
CT$137.061
DC$149.911
DE$125.731
FL$121.66–$132.473
GA$113.51–$129.292
GU$144.691
HI$144.691
IA$116.441
ID$117.081
IL$116.19–$130.694
IN$117.971
KS$115.041
KY$113.131
LA$112.62–$119.752
MA$134.00–$151.952
MD$128.78–$149.913
ME$117.08–$126.112
MI$116.19–$122.802
MN$130.951
MO$109.70–$121.153
MS$109.571
MT$127.261
NC$118.731
ND$127.261
NE$117.461
NH$132.471
NJ$138.97–$147.622
NM$116.701
NV$127.381
NY$120.89–$151.315
OH$116.191
OK$113.641
OR$126.75–$141.382
PA$116.82–$132.472
PR$128.661
RI$131.461
SC$117.591
SD$127.261
TN$115.681
TX$115.80–$134.648
UT$119.621
VA$125.09–$149.912
VI$128.661
VT$125.981
WA$134.00–$156.142
WI$121.911
WV$110.591
WY$127.261

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

3.8100 adjusted RVUs×$33.4009 conversion factor=$127.26

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

RuleCMS valueWhat it means
Global periodZZZAdd-on code: falls within the primary procedure’s global period.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical3Technical 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.

  • Q4429
    DermBnd skin substitute · 0 wRVU
    $127.26
  • Q4426
    Skin substitute · 0 wRVU
    $127.26+$0.00
  • Q4427
    Skin substitute · 0 wRVU
    $127.26+$0.00
  • Q4428
    DermBnd skin substitute · 0 wRVU
    $127.26+$0.00

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.

Codes related to Q4429

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to Q4429
CodeHow it relatesNational office range
Same family
Q4426Skin substituteIdentifies DermBnd TL+ or TLX rather than CHN or CHX.$109.31–$183.51
Q4427Skin substituteIdentifies DermBnd DLN, DL+, or DLX rather than CHN or CHX.$109.31–$183.51
Q4428DermBnd skin substituteIdentifies DermBnd SLN, SL+, or SLX rather than CHN or CHX.$109.31–$183.51

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

Show the CMS file lines behind this rate
RVUs for Q4429PPRRVU2026_Oct_nonQPP.csv, line 18,514 (RVU26D)

Open CMS sourceHow we calculate rates

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