How dressing codes are split
Most surgical dressing codes come in three pad-size bands — 16 sq. in. or less, more than 16 up to 48 sq. in. and more than 48 sq. in. — with separate codes for dressings with and without an adhesive border. Fillers are billed per unit: per 6 inches for rope and other fillers, per gram for dry collagen filler, and per fluid ounce for hydrogel gel. Bandages and roll gauze are billed per yard. The descriptors are in the DME MAC Supplier Manual's Appendix A.
Codes by dressing family
Typical HCPCS categories and Medicare's usual change frequency for each family PCSS carries. Each name links to the sizes we stock.
| Dressing family | Typical HCPCS category | Usual change frequency (LCD L33831) |
|---|---|---|
| Alginates & gelling fibers | A6196–A6198 (cover, by pad size) · A6199 (filler, per 6 in.) | Up to once per day. |
| Foams | A6209–A6211 (no border) · A6212–A6214 (border) · A6215 (filler) | Cover dressings up to 3 times per week; foam fillers up to once per day. |
| Super absorbents | A6251–A6253 (no border) · A6254–A6256 (border) | Up to once per day without a border; up to every other day with a border. |
| Hydrocolloids | A6234–A6236 (no border) · A6237–A6239 (border) | Up to 3 times per week. |
| Hydrogels & honey | Hydrogel A6242–A6244 (no border), A6245–A6247 (border), A6248 (gel, per fl oz) · hydrogel gauze A6231–A6233 | Hydrogel covers without an adhesive border, and hydrogel fillers: up to once per day. Covers with a border: up to 3 times per week. No frequency is stated for hydrogel-impregnated gauze. Gel filler (A6248) is also capped at 3 fluid ounces per wound in 30 days. |
| Gauze, composites & film | Bordered gauze A6219–A6221 · composites A6203–A6205 · film A6257–A6259 · conforming roll A6446 | Bordered gauze once per day; composites and film up to 3 times per week. |
| Non-adherent & impregnated gauze | A6222–A6224 (impregnated gauze, without border) | Up to once per day. |
| Wound cleanser | A6260 (wound cleanser) | Not covered under the surgical dressing benefit |
| Collagen sheets | A6021–A6023 (collagen dressing, by pad size) | No change frequency stated in the LCD. Wear time: collagen dressings “can stay in place up to 7 days.” |
| Collagen particles (powder) | A6010 (collagen filler, dry form, per gram) | — |
| Unna boots | A6456 (zinc paste impregnated bandage, per yard) | Weekly. Covered for venous leg ulcers that are qualifying wounds. |
| Tubular & cohesive bandages | A6457 (tubular dressing, per linear yard) · A6454 (self-adherent bandage, per yard) | — |
Pad-size examples
Pad area decides the band. For alginate and other fiber gelling dressings:
- A 4×4 pad is 16 sq. in., so it falls in the first band: A6196.
- A 6×6 pad is 36 sq. in.: A6197.
- A 10×10 pad is 100 sq. in.: A6198.
- Alginate rope is a filler, billed per 6 inches: A6199.
The same bands apply to foam (A6209–A6211 without a border, A6212–A6214 with one), collagen (A6021–A6023) and most other wound covers.
Rules that trip claims
Collagen codes need a PDAC listing
Medicare allows collagen dressing codes A6021–A6024 only for products with a coding verification published on the PDAC Product Classification List. Check the listing for the specific product before you dispense it.
Wound cleanser isn't a covered dressing
Medicare does not cover wound cleansers (A6260) under the surgical dressing benefit, including when they come in a kit.
Dressings applied during a billed service aren't billed separately
When a practitioner applies dressings as part of a professional service billed to Medicare, the dressings are included in that service and are not separately payable. Dressings sent home with the patient may be billed, with the patient's home — not the office — as the place of service.
Silver and honey: coded by the main material
The LCD lists silver and honey among materials whose safety and effectiveness “have not been established.” Multi-component dressings are classified by their clinically predominant component, and the impregnated-gauze codes aren't used for gauze that contains silver or honey. PCSS lists these products by their base dressing type — confirm the code for the specific item.
Sources: Policy Article A54563, LCD L33831, Supplier Manual Appendix A.
Confirm before you bill
These are typical categories by product type and pad size, for reference. The code for a specific product depends on its PDAC classification and the documentation behind the claim. Confirm final coding with your billing staff — or ask us: every PCSS product page lists suggested codes size by size.
For CMS's official wording of any code from A6000 to A6599, use the wound care HCPCS code lookup.
Sources
Checked on October 6, 2026. Medicare policy changes; confirm current versions before relying on them. This page is general information, not billing, coding or legal advice.
- 1DME Supplier Manual, Appendix A (HCPCS descriptors)CGS Administrators, DME MAC Jurisdiction B · Fall 2026 edition
- 2LCD L33831 — Surgical DressingsCMS Medicare Coverage Database (DME MACs) · Revision R11, effective January 1, 2024
- 3Policy Article A54563 — Surgical DressingsCMS Medicare Coverage Database (DME MACs) · Revision R14, effective December 5, 2024