HCPCS code Q4123: AlloSkin graft, material used with graft application2026 Medicare rate & RVUs in Delaware

Report Q4123 for AlloSkin graft material used during a qualifying application procedure, such as coverage of a prepared lower-leg wound.

CMS RVU26DEffective Oct 1, 2026One payment locality

In Delaware, Medicare pays $125.73 for Q4123 in the office.

$125.73Office (non-facility)
Not available in this settingHospital or facility
−1.2%vs the national office rate ($127.26)

Check a contract rate as a % of Medicare · Q4123 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

We’ll open Q4123 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Delaware
  2. What Q4123 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What Q4123 covers

Q4123 identifies AlloSkin material used to cover a wound during a graft application. A clinician, such as a surgeon or wound-care physician, prepares the wound bed and places the material in a clinic or surgical setting. A lower-leg ulcer requiring graft coverage is a typical context. This code identifies the AlloSkin material, not the clinician’s work of preparing the wound and applying the graft.

Report Q4123 with the primary procedure that describes the application; CMS designates it an add-on code and pays it within the primary procedure’s global period. The record should identify AlloSkin, the wound site, the amount used, and the application performed. Select the application code from the treated body site and wound area rather than from the product name. CMS classifies Q4123 as technical-component-only; a separate code covers interpretation when an interpretation service is reported. Q4115 also carries an AlloSkin short label, so the short descriptor alone cannot resolve which product code belongs on a claim.

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.

How Delaware compares for Q4123

Across 109 of 109 payment localities, the office rate for Q4123 runs from $109.31 in Arkansas to $183.51 in Santa Clara County, CA. Delaware pays $125.73. The RVUs are the same everywhere; the geographic indexes change the dollars.

Q4123 in Delaware vs other payment areas
  1. Delaware · this page$125.73
  2. Los Angeles, CA · California$150.55+$24.82
  3. Washington, DC area · District of Columbia$149.91+$24.18
  4. Miami, FL · Florida$132.47+$6.74
  5. Chicago, IL · Illinois$127.89+$2.16
  6. Manhattan, NY · New York$147.87+$22.14
  7. Alaska · Alaska$135.53+$9.80

Other areas in Delaware first, then benchmark localities. Bars start at $0.

Every other payment area

Q4123 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$111.35—
ArkansasArkansas$109.31—
ArizonaArizona$123.31—
Bakersfield, CACalifornia$139.47—
Chico, CACalifornia$139.47—
El Centro, CACalifornia$139.47—
Fresno, CACalifornia$139.47—
Hanford, CACalifornia$139.47—

Q4123 rates by state

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

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
Q4123 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

See Q4123 in every payment locality

How the Q4123 rate is calculated

Each of Q4123’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 · Q4123

RVUs × geographic indexes × conversion factor

Office or facility?

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.

The exact Delaware inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

18,219

Code
Q4123
Physician work
0.00
Practice expense
3.81
Malpractice
0.00

GPCI2026.csv

40

Locality
Delaware
Physician work
1.005
Practice expense
0.988
Malpractice
0.899
Office calculation for Q4123 in Delaware
ComponentRVULocality factorAdjusted
Physician work0.00× 1.0050.0000
Practice expense3.81× 0.9883.7643
Malpractice0.00× 0.8990.0000
Total RVUs3.7643
Conversion factor× 33.4009

Office rate, Delaware$125.73

Office: (0 × 1.005 + 3.81 × 0.988 + 0 × 0.899) × $33.4009 = $125.73

Open Q4123 in the RVU calculator

Payment rules and modifiers for Q4123

The CMS indicators that decide how Q4123 is paid alongside other services.

CMS payment indicators · Q4123

AlloSkin graft, material used with graft application

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.

How Q4123 has changed in Delaware

Q4123 · Office / nonfacility

$125.73

Effective 2026-10-01

A rate is unavailable in one of these releases, so a change cannot be calculated.

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release
  1. January 1, 2026

    RVU26A

    No ratechanged to$125.73

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2013

    RVU13AR

    Earliest loaded release: No rate

    Held through RVU13B, RVU13C, RVU13D, RVU14A, RVU14B, RVU14C, RVU14D, RVU15A, RVU15B, RVU15C, RVU15D, RVU16A, RVU16B, RVU16C, RVU16D, RVU17A, RVU17B, RVU17C, RVU17D, RVU18AR1, RVU18B, RVU18C, RVU18D, RVU19A, RVU19B, RVU19C, RVU19D, RVU20A, RVU20B, RVU20C, RVU20D, RVU21A, RVU21B, RVU21C, RVU21D, RVU22A, RVU22B, RVU22C, RVU22D, RVU23A, RVU23B, RVU23C, RVU23D, RVU24A, RVU24AR, RVU24B, RVU24C, RVU24D, RVU25A, RVU25B, RVU25C, RVU25D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$125.73Not available in this settingRVU26D
2026-07-01$125.73Not available in this settingRVU26C
2026-04-01$125.73Not available in this settingRVU26B
2026-01-01$125.73Not available in this settingRVU26A
2025-10-01Separate payment rules applySeparate payment rules applyRVU25D
2025-07-01Separate payment rules applySeparate payment rules applyRVU25C
2025-04-01Separate payment rules applySeparate payment rules applyRVU25B
2025-01-01Separate payment rules applySeparate payment rules applyRVU25A
2024-10-01Separate payment rules applySeparate payment rules applyRVU24D
2024-07-01Separate payment rules applySeparate payment rules applyRVU24C
2024-04-01Separate payment rules applySeparate payment rules applyRVU24B
2024-03-09Separate payment rules applySeparate payment rules applyRVU24AR
2024-01-01Separate payment rules applySeparate payment rules applyRVU24A
2023-10-01Separate payment rules applySeparate payment rules applyRVU23D
2023-07-01Separate payment rules applySeparate payment rules applyRVU23C
2023-04-01Separate payment rules applySeparate payment rules applyRVU23B
2023-01-01Separate payment rules applySeparate payment rules applyRVU23A
2022-10-01Separate payment rules applySeparate payment rules applyRVU22D
2022-07-01Separate payment rules applySeparate payment rules applyRVU22C
2022-04-01Separate payment rules applySeparate payment rules applyRVU22B
2022-01-01Separate payment rules applySeparate payment rules applyRVU22A
2021-10-01Separate payment rules applySeparate payment rules applyRVU21D
2021-07-01Separate payment rules applySeparate payment rules applyRVU21C
2021-04-01Separate payment rules applySeparate payment rules applyRVU21B
2021-01-01Separate payment rules applySeparate payment rules applyRVU21A
2020-10-01Separate payment rules applySeparate payment rules applyRVU20D
2020-07-01Separate payment rules applySeparate payment rules applyRVU20C
2020-04-01Separate payment rules applySeparate payment rules applyRVU20B
2020-01-01Separate payment rules applySeparate payment rules applyRVU20A
2019-10-01Separate payment rules applySeparate payment rules applyRVU19D
2019-07-01Separate payment rules applySeparate payment rules applyRVU19C
2019-04-01Separate payment rules applySeparate payment rules applyRVU19B
2019-01-01Separate payment rules applySeparate payment rules applyRVU19A
2018-10-01Separate payment rules applySeparate payment rules applyRVU18D
2018-07-01Separate payment rules applySeparate payment rules applyRVU18C
2018-04-01Separate payment rules applySeparate payment rules applyRVU18B
2018-01-01Separate payment rules applySeparate payment rules applyRVU18AR1
2017-10-01Separate payment rules applySeparate payment rules applyRVU17D
2017-07-01Separate payment rules applySeparate payment rules applyRVU17C
2017-04-01Separate payment rules applySeparate payment rules applyRVU17B
2017-01-01Separate payment rules applySeparate payment rules applyRVU17A
2016-10-01Separate payment rules applySeparate payment rules applyRVU16D
2016-07-01Separate payment rules applySeparate payment rules applyRVU16C
2016-04-01Separate payment rules applySeparate payment rules applyRVU16B
2016-01-01Separate payment rules applySeparate payment rules applyRVU16A
2015-10-01Separate payment rules applySeparate payment rules applyRVU15D
2015-07-01Separate payment rules applySeparate payment rules applyRVU15C
2015-04-01Separate payment rules applySeparate payment rules applyRVU15B
2015-01-01Separate payment rules applySeparate payment rules applyRVU15A
2014-10-01Separate payment rules applySeparate payment rules applyRVU14D
2014-07-01Separate payment rules applySeparate payment rules applyRVU14C
2014-04-01Separate payment rules applySeparate payment rules applyRVU14B
2014-01-01Separate payment rules applySeparate payment rules applyRVU14A
2013-10-01Separate payment rules applySeparate payment rules applyRVU13D
2013-07-01Separate payment rules applySeparate payment rules applyRVU13C
2013-04-01Separate payment rules applySeparate payment rules applyRVU13B
2013-01-01Separate payment rules applySeparate payment rules applyRVU13AR

Price Q4123 for an earlier date of service

Where the Delaware rate applies

Delaware is a Medicare payment area, not a city. Our Census mapping connects it to 79 cities and communities in Delaware. Some span more than one payment area; confirm with the service ZIP.

  • Arden
  • Ardencroft
  • Ardentown
  • Bear
  • Bellefonte
  • Bethany Beach
  • Bethel
  • Blades

Browse all communities in Delaware

Q4123 billing questions

Does Q4123 replace the graft application code?

No. Q4123 is an add-on for AlloSkin material and must be reported with the primary application procedure. CMS pays it within that procedure’s global period.

How should Q4123 be distinguished from Q4115?

Confirm the applicable product coding details before choosing between them; the short labels alone do not establish a distinction.

Can Q4123 be used for TheraSkin or Oasis tri-layer wound matrix?

No. Q4123 identifies AlloSkin; Q4121 identifies TheraSkin, and Q4124 identifies Oasis tri-layer wound matrix.

What documentation supports Q4123?

Document that AlloSkin was used, the wound site, the amount of material used, and the procedure in which it was applied.

Does Q4123 include a professional interpretation?

CMS classifies Q4123 as technical-component-only. A separate code covers interpretation when that service is reported.

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 Q4123PPRRVU2026_Oct_nonQPP.csv, line 18,219 (RVU26D)
Geographic factors for DelawareGPCI2026.csv, line 40 (RVU26D)

Open CMS sourceHow we calculate rates

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