HCPCS Q4140: BioD-FenceMedicare rate & RVUs in Alaska
Reports BioD-Fence tissue matrix by treated area when clinicians apply the product to a wound or soft-tissue site with a primary procedure.
Medicare pays $135.53 for Q4140 in the office in Alaska (Alaska*). 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.
On this page 9 sections
What Q4140 covers
Q4140 identifies BioD-Fence, a placental-derived tissue matrix supplied for application to a prepared wound or soft-tissue site. Clinicians may use it as a protective covering on wounds such as chronic ulcers or operative defects. The product code represents the material, not the work of preparing the site or applying the matrix; those services are represented by the related procedure code when separately reportable.
Report the product by the documented area used, with one unit representing one square centimeter. The record should identify BioD-Fence, the treated site, the area applied, and the associated primary procedure. CMS classifies Q4140 as an add-on code: submit it only with a primary procedure, and payment falls within that procedure’s global period. CMS also classifies it as technical-component-only, with a separate code covering 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.
Q4140 in Alaska*
| Payment locality | Office | Facility |
|---|---|---|
| Alaska* | $135.53 | Unavailable |
How the Q4140 rate is calculated
Each of Q4140’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 · Q4140
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 Q4140
The CMS indicators that decide how Q4140 is paid alongside other services.
CMS payment indicators · Q4140
BioD-Fence
| 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. |
Q4140 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4138Wound matrix
- Q4138 is for BioD-Fence DryFlex; Q4140 is for BioD-Fence. Match the claim to the product form documented.
- Q4137Wound matrix
- Q4137 reports AmnioExcel or BioDExcel by area. Use Q4140 when the product applied is BioD-Fence.
- Q4139Amnio or biodmatrix, inj 1cc
- Q4139 identifies injectable Amnio or BioDMatrix and uses a volume unit. Q4140 identifies BioD-Fence and is reported by area.
Q4140 billing questions
Can Q4140 be billed by itself?
No. CMS identifies Q4140 as an add-on code, so it must be reported with a primary procedure.
How are units determined?
Report one unit for each square centimeter of BioD-Fence used. Document the treated area and the amount applied.
Does Q4140 include the application procedure?
No. Q4140 reports the BioD-Fence product; the associated wound or skin-substitute application procedure is reported separately when appropriate.
How does Q4140 differ from Q4138?
Q4140 identifies BioD-Fence, while Q4138 identifies the DryFlex form of BioD-Fence. Select the code that matches the product form used.
What does the technical-component classification mean?
CMS classifies Q4140 as technical-component-only, with interpretation covered by a separate code.
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
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