$162.36–$182.34
15271 reports application work for eligible wounds; Q4390 reports the Ascendion product quantity. They represent different parts of the wound treatment.
On this page
CMS RVU26D · Effective 2026-10-01
Q4390 Skin substitute Medicare reimbursement rates in Washington
Report Q4390 for the Ascendion wound product by square centimeter when it is furnished with a primary wound procedure. Compare Q4390 office and facility rates across CMS payment localities in Washington.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for Q4390 in Washington?
Washington has 2 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 2 payment areas shown below, using the same CMS release.
Office / nonfacility
$134.00–$156.14
2 of 2 localities have a supported rate.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Wound care
About Q4390: Ascendion wound product per square centimeter
Report Q4390 for the Ascendion wound product by square centimeter when it is furnished with a primary wound procedure.
Q4390 identifies the Ascendion wound product, measured in square centimeters. It is reported when the product is furnished for wound treatment, such as in an outpatient wound clinic or a podiatry or surgical practice. The product code is separate from the procedure used to prepare the wound and apply the product; for example, the application may be reported with the appropriate skin-substitute application code.
Report the quantity in square centimeters supported by the record and use Q4390 only with a primary procedure. CMS treats it as an add-on code, with payment included within that procedure’s global period. It is a technical-component-only code: a separate code covers interpretation. Documentation should identify Ascendion as the product used and support the quantity reported, along with the wound and the associated primary procedure. The product quantity is not established solely by documenting the wound’s dimensions.
CMS billing rules for Q4390
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- Professional and technical components
- Technical-component-only code: a separate code covers interpretation.
Where the value comes from
- Work RVU0.00 · 0%
- Practice expense (office) RVU3.81 · 100%
- Malpractice RVU0.00 · 0%
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.
Q4390 compared with similar codes
Office rates for Washington, from the same CMS release.
$134.00–$156.14
Q4391 identifies Amnioplast Double, not Ascendion. Select the product code that matches the material furnished.
$134.00–$156.14
Q4392 identifies Grafix Duo, not Ascendion. These product-specific codes are not interchangeable merely because both are reported per square centimeter.
Compare Q4390 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
2 of 2 payment localities
Rest Of Washington →
Office / nonfacility
$134.00
Facility
Unavailable
Seattle (King Cnty) →
Office / nonfacility
$156.14
Facility
Unavailable
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Q4390 billing questions
How is Q4390 different from the Ascendion application procedure?
Q4390 identifies the product by square centimeter. Report the appropriate application procedure separately for the work of applying the product.
Can Q4390 be billed by itself?
No. CMS classifies it as an add-on code that must be billed with a primary procedure.
What quantity should the record support?
Document the Ascendion product and the square-centimeter quantity reported. Wound dimensions alone do not establish the product quantity.
How does the global-period rule affect payment?
Payment for Q4390 falls within the global period of the primary procedure. It is not paid as a separate service outside that procedure’s global period.
Does Q4390 include interpretation?
No. CMS identifies Q4390 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 indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
18,472Q4387,,Neothelium ft per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,473Q4388,,Neothelium 4l per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,474Q4389,,Neothelium 4l+ per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,475Q4390,,Ascendion per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,476Q4391,,Amnioplast double per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,477Q4392,,Grafix duo per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
18,478Q4393,,Surgraft ac per sq cm,A,,0.00,3.81,,3.81,NA,0.00,3.81,3.81,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00