HCPCS Q4165: Wound matrixMedicare rate & RVUs in Alaska
Report Q4165 for each square centimeter of Keramatrix or Kerasorb wound matrix furnished with a primary procedure for wound treatment.
Medicare pays $135.53 for Q4165 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 Q4165 covers
Q4165 identifies Keramatrix or Kerasorb wound matrix supplied for placement on a wound. A wound-care clinician, surgeon, or podiatrist may use the product as part of treating a wound that requires a matrix dressing. The code represents the named product, not the clinician’s wound assessment or the primary procedure used to prepare or treat the wound. The claim unit is based on square centimeters, so the product name and quantity used should be clear in the record.
CMS classifies Q4165 as an add-on code: report it only with a primary procedure, and its payment falls within that procedure’s global period. CMS also identifies it as technical-component-only, with interpretation covered by a separate code when applicable. Its physician fee schedule valuation assigns practice-expense value but no work or malpractice RVUs. Documentation should identify Keramatrix or Kerasorb, the wound treated, the amount furnished, and the associated primary procedure.
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.
Q4165 in Alaska*
| Payment locality | Office | Facility |
|---|---|---|
| Alaska* | $135.53 | Unavailable |
How the Q4165 rate is calculated
Each of Q4165’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 · Q4165
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 Q4165
The CMS indicators that decide how Q4165 is paid alongside other services.
CMS payment indicators · Q4165
Wound matrix
| 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. |
Q4165 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4154Wound matrix
- Q4154 identifies Biovance, while Q4165 identifies Keramatrix or Kerasorb. Choose the code for the product actually furnished.
- Q4158Wound matrix
- Q4158 identifies Kerecis Omega3; Q4165 is for Keramatrix or Kerasorb. The product name, not a general wound-matrix resemblance, determines the code.
- Q4166Wound matrix
- Q4166 identifies Cytal, whereas Q4165 identifies Keramatrix or Kerasorb. Report the specific product used and its corresponding code.
Q4165 billing questions
Can Q4165 be billed by itself?
No. CMS classifies it as an add-on code, so it must be billed with a primary procedure.
How are Q4165 units counted?
The code is measured per square centimeter. Document the Keramatrix or Kerasorb product and the quantity furnished in square centimeters.
Can Q4165 be reported with a wound procedure on the same claim?
Yes, when the product is furnished with a primary procedure. CMS places payment for Q4165 within that procedure’s global period.
Does Q4165 include interpretation?
No. CMS designates Q4165 as technical-component-only and indicates that a separate code covers interpretation when applicable.
What documentation supports Q4165?
Record the specific product used, the wound treated, the square centimeters furnished, and the primary procedure reported with the add-on.
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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