HCPCS Q4399: Wound productMedicare rate & RVUs in Oregon
Report Q4399 for Summit FX wound product by square centimeter when it is supplied with a primary wound procedure.
Medicare pays $126.75–$141.38 for Q4399 in the office in Oregon, from Rest Of Oregon to Portland. 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 Q4399 covers
Q4399 identifies Summit FX, a wound-care product reported by the square centimeter. It is used when a clinician applies the product to a wound, such as a chronic ulcer, in an outpatient wound clinic or hospital setting. The code represents the product rather than the clinician’s wound assessment or the work of applying it.
Report the quantity in square centimeters and pair Q4399 with the primary procedure, as CMS classifies it as an add-on code. CMS pays it within that procedure’s global period. CMS also designates Q4399 as technical-component-only, with a separate code covering interpretation. Documentation should identify Summit FX, the treated wound, the amount supplied or used, and the primary procedure performed.
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 Q4399 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | $141.38 | Unavailable |
| Rest Of Oregon | $126.75 | Unavailable |
How the Q4399 rate is calculated
Each of Q4399’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 · Q4399
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.00Practice expense 3.81Malpractice 0.00
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for Q4399
The CMS indicators that decide how Q4399 is paid alongside other services.
CMS payment indicators · Q4399
Wound product
| 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. |
Q4399 compared with similar codes
Compare codes
Q4399 vs Q4397 vs Q4398 vs Q4392: national Medicare rates
Swap in your local Medicare rate.
How to choose
- Q4397Summit aaa per sq cm
- Q4397 identifies Summit AAA; Q4399 identifies Summit FX. Choose the code matching the specific product supplied.
- Q4398Skin substitute
- Q4398 identifies Summit AC, not Summit FX. These product-specific codes are not interchangeable based only on their shared brand name.
- Q4392Skin substitute
- Q4392 identifies Grafix Duo, a different product. Use Q4399 only for Summit FX.
Q4399 billing questions
When should Q4399 be selected instead of another Summit code?
Use Q4399 when the product furnished is Summit FX. Summit AAA and Summit AC have separate HCPCS codes; select the identifier that matches the product used.
Can Q4399 be billed by itself?
No. CMS classifies it as an add-on code, so it must be billed with a primary procedure.
How is the quantity reported?
The descriptor is per square centimeter. Document the Summit FX area supplied or used and report the corresponding quantity.
How does the global-period rule affect payment?
CMS pays Q4399 within the global period of the primary procedure. It is not paid as a stand-alone service.
What does the technical-component designation mean?
CMS identifies Q4399 as technical-component-only and states that a separate code covers interpretation. The product and its quantity should be documented distinctly from any separately coded 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
Show the CMS file lines behind this rate
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