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HCPCS Q4379: Wound graftMedicare rate & RVUs

Report AmnioDefend FT by square centimeter when the product is furnished for wound grafting and billed with a primary application procedure.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $127.26 for Q4379 nationally in the office. Local office rates run $109.31–$183.51.

Medicare rate · Q4379

Wound graft

Work RVUs
0
Total RVUs
3.81
Global days
ZZZ

National rate · 2026

$127.26

Office setting, before claim adjustments.

See every locality for Q4379 →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 Q4379 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 Q4379 covers

Q4379 identifies the AmnioDefend FT wound graft product, reported by the square centimeter furnished. Wound-care clinicians and surgeons may use it during a procedure to cover a wound bed; the application service is reported separately under the appropriate primary procedure code. The product code identifies the material, not the clinician’s work in preparing the wound or applying the graft.

Report units based on the documented square centimeters of product furnished, and pair Q4379 with the primary procedure. The record should identify AmnioDefend FT, the wound site, the amount used, and the associated application procedure. CMS classifies Q4379 as an add-on code: it is billed only with a primary procedure and paid within that procedure’s global period. CMS also classifies it as technical-component-only; a separate code covers 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 Q4379 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

Q4379 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

Q4379 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
Q4379 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 Q4379 rate is calculated

Each of Q4379’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 · Q4379

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 Q4379

The CMS indicators that decide how Q4379 is paid alongside other services.

CMS payment indicators · Q4379

Wound graft

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.

Q4379 compared with similar codes

Compare codes · National

4 codes, side by side

  • Q4379

    Wound graft0 wRVU

    $127.26

  • Q4378

    Wound matrix0 wRVU

    $127.26+$0.00

  • Q4377

    Skin substitute0 wRVU

    $127.26+$0.00

  • Q4385

    Wound product0 wRVU

    $127.26+$0.00

How to choose

Q4378Wound matrix
Q4378 identifies Renew FT Matrix; Q4379 identifies AmnioDefend FT. Use the code matching the product furnished.
Q4377Skin substitute
Q4377 identifies Trigraft FT rather than AmnioDefend FT. The product name, not the shared per-square-centimeter unit, distinguishes the codes.
Q4385Wound product
Q4385 identifies Apollo FT. Report Q4379 only when AmnioDefend FT was furnished.

Codes related to Q4379

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

Codes related to Q4379
CodeHow it relatesNational office range
Primary code
15271Skin substitute graftPrimary wound-graft application procedure when the site and area fit this code.$140.17–$205.27
Used instead
Q4378Wound matrixSeparate per-square-centimeter code for Renew FT Matrix, another named wound product.$109.31–$183.51
Q4377Skin substituteSeparate per-square-centimeter code for Trigraft FT.$109.31–$183.51
Q4385Wound productSeparate per-square-centimeter code for Apollo FT.$109.31–$183.51

Q4379 billing questions

Can Q4379 be billed by itself?

No. CMS identifies Q4379 as an add-on code that must be billed with a primary procedure.

How should the units be determined?

Report the square centimeters of AmnioDefend FT furnished, supported by the product amount and wound documentation.

Which procedure is billed with Q4379?

Pair it with the primary wound-graft application procedure appropriate to the wound site and treated area, such as billing code 15271 when applicable.

Does Q4379 include interpretation?

No. CMS classifies Q4379 as technical-component-only and identifies a separate code for interpretation.

What documentation supports Q4379?

Document the product as AmnioDefend FT, the wound site, the square centimeters furnished, and the primary application procedure.

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 Q4379PPRRVU2026_Oct_nonQPP.csv, line 18,465 (RVU26D)

Open CMS sourceHow we calculate rates

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