HCPCS code Q4387: Skin substitute, neothelium FT, per square centimeter2026 Medicare rate & RVUs in Michigan
Q4387 reports the Neothelium FT skin-substitute product by square centimeter when furnished with a qualifying wound-graft application procedure.
Medicare pays $116.19–$122.80 for Q4387 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 Q4387 covers
Q4387 identifies the Neothelium FT product used as a skin substitute for wound coverage. Its unit basis is one square centimeter. It is associated with wound-care treatment in which a clinician applies a skin substitute to a prepared wound; the treating physician or other qualified practitioner documents the wound and directs the application. This code represents the product, not the wound-care evaluation or the work of applying it.
Report Q4387 only with the primary procedure for which the product is used; CMS treats it as an add-on paid within that procedure’s global period. The applicable application code depends on wound location and treated area, so the product code alone does not determine the primary procedure. Document the product identity, amount in square centimeters, wound site and dimensions, and related application procedure. Q4387 is technical-component-only, with interpretation represented by a separate code.
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 Q4387 pays more and less in Michigan
| Payment locality | Office | Facility |
|---|---|---|
| Detroit, MI | $122.80 | Unavailable |
| Rest of Michigan | $116.19 | Unavailable |
How the Q4387 rate is calculated
Each of Q4387’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 · Q4387
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 Q4387
The CMS indicators that decide how Q4387 is paid alongside other services.
CMS payment indicators · Q4387
Skin substitute, neothelium FT, 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. |
Q4387 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4388Wound productNeothelium 4L, per square centimeter
- Q4388 identifies Neothelium 4L, while Q4387 identifies Neothelium FT. Match the reported code to the specific product furnished.
- Q4389Wound matrixNeothelium 4L+
- Q4389 identifies Neothelium 4L+, a different product variant from the Neothelium FT product represented by Q4387.
- Q4377Skin substituteTrigraft, per sq cm
- Q4377 identifies Trigraft FT rather than Neothelium FT. These codes distinguish products, even though both use a per-square-centimeter unit basis.
Q4387 billing questions
When should Q4387 be chosen over Q4388 or Q4389?
Use Q4387 when the product furnished is Neothelium FT. Q4388 and Q4389 identify different Neothelium product variants, so select the code matching the product documentation.
Can Q4387 be billed by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure and is paid within that procedure’s global period.
Does Q4387 include the wound application procedure?
No. Q4387 identifies the product; report the applicable wound-graft application procedure separately as the primary procedure.
How should units be documented?
The code is reported per square centimeter. Keep documentation identifying the product and the quantity in square centimeters associated with the service.
Does Q4387 include professional interpretation?
No. CMS classifies Q4387 as technical-component-only; 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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