HCPCS Level II · Hydrogel dressings and hydrogel gauze
A6231: hydrogel gauze, pad 16 sq. in. or less
A sterile hydrogel-impregnated gauze dressing for direct wound contact, pad 16 sq. in. or less, billed per dressing.
Illustration, not the exact productAt a glance
- Billing unit
- Each (per dressing)
- Size band
- Pad 16 sq. in. or less
- Adhesive border
- Not part of the descriptor
- PCSS products
- 1 line, 2 sizes
Official CMS descriptor
How CMS describes A6231
“Gauze, impregnated, hydrogel, for direct wound contact, sterile, pad size 16 sq. in. or less, each dressing”
- Code
- A6231
- Short descriptor
- Hydrogel dsg<=16 sq in
- Code added
- January 1, 2001
- Action effective date
- January 1, 2009
- Status in this file
- Active (no termination date)
PCSS products
What PCSS carries under A6231
PCSS suggests A6231 as the typical HCPCS category for these product sizes.
Hydrogel saturated gauze
Hydrogels & honey
Sizes PCSS suggests A6231 for
- 2×2
- 4×4
PCSS's suggested HCPCS categories (July 2026) are for reference only, based on product type and pad size. It's a reference, not a coding determination. Confirm final coding with your billing staff.
General product information, not clinical advice.
Size band
Pad size sets the band
CMS splits this dressing type into 3 bands: pad 16 sq. in. or less, pad more than 16 up to 48 sq. in. and pad more than 48 sq. in. Multiply the pad's length by its width: a 4×4 in. pad is 16 sq. in., which falls in A6231's band (16 sq. in. or less).
Usual change frequency (LCD L33831)
LCD L33831 states no change frequency for hydrogel-impregnated gauze (A6231–A6233). Its hydrogel frequencies name wound covers and wound fillers only.
LCD L33831(opens in a new tab)Medicare notes for A6231
PCSS has no code-specific Medicare notes for A6231. The documentation checklist covers what dressing orders and notes need to show.
Medicare details checked against CMS sources on October 6, 2026. Not billing, coding or legal advice.
Related codes
Hydrogel dressings and hydrogel gauze: other codes
Codes PCSS carries open their own page; the rest open in the full lookup.
- A6232PCSS carriesHydrogel dsg>16<=48 sq inCode page
- A6233Hydrogel dressing >48 sq inIn the lookup
- A6242Hydrogel drg <=16 in w/o bdrIn the lookup
- A6243Hydrogel drg >16<=48 w/o bdrIn the lookup
- A6244Hydrogel drg >48 in w/o bdrIn the lookup
- A6245Hydrogel drg <= 16 in w/bdrIn the lookup
- A6246Hydrogel drg >16<=48 in w/bIn the lookup
- A6247Hydrogel drg > 48 sq in w/bIn the lookup
- A6248PCSS carriesHydrogel drsg gel fillerCode page
Questions
A6231: common questions
Answers draw on the CMS descriptor, PCSS's suggested codes and the Medicare notes on this page.
What is HCPCS code A6231?
A6231 is a Level II HCPCS code. Its CMS long descriptor reads “Gauze, impregnated, hydrogel, for direct wound contact, sterile, pad size 16 sq. in. or less, each dressing”, and its short descriptor is “Hydrogel dsg<=16 sq in” (October 2026 Alpha-Numeric HCPCS File, CMS).
What does PCSS suggest A6231 for?
PCSS suggests A6231 as the typical HCPCS category for Hydrogel saturated gauze (2×2, 4×4). PCSS's suggested HCPCS categories (July 2026) are for reference only, based on product type and pad size. Confirm final coding with your billing staff.
Does LCD L33831 set a change frequency for A6231?
LCD L33831 states no change frequency for hydrogel-impregnated gauze (A6231–A6233). Its hydrogel frequencies name wound covers and wound fillers only.
What size range does A6231 cover?
A6231 covers a pad of 16 sq. in. or less. In the same series, A6232 covers a pad of more than 16 up to 48 sq. in. and A6233 covers a pad of more than 48 sq. in.
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