HCPCS code Q4319: Wound graft, sanograft, per square centimeter2026 Medicare rate & RVUs in Michigan
Report Q4319 for Sanograft supplied by square centimeter with an appropriate wound application procedure, not as a stand-alone service.
Medicare pays $116.19–$122.80 for Q4319 in the office in Michigan, from Rest of Michigan to Detroit, MI. 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 Q4319 covers
Q4319 identifies Sanograft supplied for wound coverage, with the reported quantity measured in square centimeters. It represents the product, not the clinician’s work to prepare the wound or apply the graft. It is reported with an appropriate skin-substitute application service, such as an application code selected according to the treated body site and wound area. The product code alone does not identify the wound type or establish which application code applies.
Document the Sanograft product used, the treated wound’s location and dimensions, and the quantity reported in square centimeters. CMS classifies Q4319 as an add-on: submit it only with a primary procedure, and its payment falls within that procedure’s global period. CMS also classifies it as technical-component-only, with interpretation represented by a separate code. The product unit and the application service describe different parts of the encounter.
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 Q4319 pays more and less in Michigan
| Payment locality | Office | Facility |
|---|---|---|
| Detroit, MI | $122.80 | Unavailable |
| Rest of Michigan | $116.19 | Unavailable |
How the Q4319 rate is calculated
Each of Q4319’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 · Q4319
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 Q4319
The CMS indicators that decide how Q4319 is paid alongside other services.
CMS payment indicators · Q4319
Wound graft, sanograft, 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. |
Q4319 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- Q4308Skin substituteSanopellis, per square centimeter
- Q4308 identifies Sanopellis, while Q4319 identifies Sanograft. Choose according to the product supplied, not simply because both are reported by square centimeter.
- Q4318Wound graftPer square centimeter
- Q4318 identifies E-graft. Q4319 is specific to Sanograft; the product’s name determines which supply code applies.
- 15271Skin substitute graftFirst 25 cm², trunk/limbs
- CPT 15271 reports application work for eligible sites on the trunk, arms, or legs. Q4319 reports the Sanograft product and is billed with a primary procedure.
- 15275Skin substituteFace and other specified sites
- CPT 15275 reports application work for specified head, face, hand, foot, or genital sites. Q4319 reports the product rather than the application service.
Q4319 billing questions
When should Q4319 be selected instead of another skin-substitute product code?
Use Q4319 when the product supplied is Sanograft. A similar per-square-centimeter unit does not make another product’s HCPCS code interchangeable.
Can Q4319 be billed by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure.
Is the wound application included in Q4319?
No. Q4319 identifies the Sanograft product; report the appropriate application procedure separately for the clinician’s work.
How are the units determined?
The code is measured per square centimeter. Document the wound location and dimensions and the Sanograft quantity supporting the units reported.
How does CMS treat the code’s components?
CMS classifies Q4319 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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