HCPCS code Q4370: Wound product, aeroguard, per square centimeter2026 Medicare rate & RVUs in Maryland
Report Q4370 for the area of Aeroguard furnished with a primary wound procedure when this product is used in wound care.
Medicare pays $128.78–$149.91 for Q4370 in the office in Maryland, from Rest of Maryland to Washington, DC area. 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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On this page 9 sections
What Q4370 covers
Q4370 identifies Aeroguard as a product-specific wound-care supply, reported according to the area furnished for wound treatment. It represents the material, rather than the clinician’s wound assessment or the act of applying it. Physicians, podiatrists, and other qualified clinicians may use it during wound care in settings such as outpatient clinics and hospital outpatient departments.
Report units based on the documented square centimeters of Aeroguard used. The record should identify the product and support the area treated. CMS classifies Q4370 as an add-on: it must be billed with a primary procedure, and its payment is included within that procedure’s global period. CMS also classifies it as technical-component-only; a separate code covers 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.
Where Q4370 pays more and less in Maryland
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$128.78 to $149.91
| Payment locality | Office | Facility |
|---|---|---|
| Baltimore area, MD | $136.55 | Unavailable |
| Rest of Maryland | $128.78 | Unavailable |
| Washington, DC area | $149.91 | Unavailable |
How the Q4370 rate is calculated
Each of Q4370’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 · Q4370
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 Q4370
The CMS indicators that decide how Q4370 is paid alongside other services.
CMS payment indicators · Q4370
Wound product, aeroguard, 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. |
Q4370 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4371Wound productNeoguard, per square centimeter
- Q4371 identifies Neoguard, a different wound product. Select the product code matching the material furnished, not simply the shared per-area billing basis.
- 15271Skin substitute graftFirst 25 cm², trunk/limbs
- 15271 reports the primary application procedure for qualifying wounds on the trunk, arms, or legs; Q4370 represents the Aeroguard product.
- 15275Skin substituteFace and other specified sites
- 15275 reports the primary application procedure for qualifying wounds at specified other anatomic sites; Q4370 represents the Aeroguard product.
Q4370 billing questions
Can Q4370 be billed by itself?
No. CMS identifies it as an add-on code, so it must be billed with a primary procedure.
Does Q4370 include the wound application procedure?
No. Q4370 represents the Aeroguard product. Report the appropriate primary procedure separately for the wound treatment.
How should units be counted?
Report the documented area of Aeroguard in square centimeters. The record should support the product and the area used.
Does Q4370 have a professional component?
CMS classifies Q4370 as technical-component-only. A separate code covers interpretation.
What documentation supports Q4370?
Document that Aeroguard was used and the square-centimeter area furnished for the wound procedure.
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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