HCPCS Code A6197: Alginate Dressing Under 48 Square Inches

Struggling with A6197 claims? Master billing and documentation for sterile alginate wound dressings to improve your reimbursement rate.

Use Code

## **What is an alginate dressing?** HCPCS code A6197 describes a sterile alginate (or other fiber gelling dressing) wound cover with a pad size more than 16 sq. in. but less than or equal to 48 sq. in. These dressings are derived from seaweed fibers and turn into a gel on contact with exudate, helping maintain a moist wound bed, supporting autolytic debridement, and helping to lock fluid and bacteria away from the skin. Indications include exudative open wounds such as pressure injuries, diabetic foot ulcers, venous leg ulcers, and post-operative wounds with moderate to heavy drainage. As a highly absorptive dressing material, alginates are placed directly on the wound surface and usually covered with a secondary dressing. They are not intended for dry wounds. If debridement is required, perform selective or mechanical methods separately as ordered. Clear instructions and product selection assist providers in optimizing treatment for patients with complex wounds.

## **A6197 documentation requirements** Provide complete information to establish medical necessity and size eligibility. ### **Wound characteristics** Document location, etiology, wound size (cm²), depth, undermining/tunneling, and exudate level. Clarify why an alginate dressing material is indicated versus alternatives (e.g., gauze dressings). ### **Product identification and size** Record brand, catalog/HCPCS description, and pad area showing >16–≤48 sq in. Note one “each” per pad used and whether a secondary dressing was applied. ### **Frequency and dressing changes** Specify change frequency based on drainage and manufacturer guidance; include any unscheduled dressing changes due to saturation, strike-through, or wound reassessment. ### **Orders and plan of care** Include a physician (or allowed practitioner) order detailing the dressing type/size, quantity, and duration; outline goals, co-therapies (compression/offloading), and related equipment needed. ### **Progress and medical necessity** Track weekly measurements, exudate trends, peri-skin status, and response to treatment (granulation/bioburden). Be prepared to supply notes and invoices upon payer request.

## **A6197 billing requirements** Follow DME MAC policies for the surgical dressings benefit to avoid denials. ### **Units and description** Bill A6197 per dressing (each); ensure the narrative includes “alginate or other fiber gelling dressing, wound cover, sterile, >16–≤48 sq in.” Units on the claim must match the documented quantity used that day. ### **Coverage and medical policy** Coverage typically requires an actively draining wound and alignment with the surgical dressings benefit/LCD. Continued supply often depends on objective improvement or valid rationale for ongoing use. ### **Quantity limits and justification** Medicare and many payers set utilization parameters; justify additional quantities with documentation of heavy exudate, larger wound size, or frequent dressing changes. ### **Pairing with other supplies** Bill only the medically necessary items. When used with a secondary dressing, ensure the record shows why both were required (securement/strike-through control). ### **Claim integrity** List diagnosis codes, ordering practitioner, dates of service, and a clear description. Retain proof of delivery and itemized details to assist providers and payers in adjudication.

## **A6197 applicable modifiers** Use wound-count modifiers to reflect how many qualified wounds were treated on that date. Apply one line per modifier as needed. The number in the modifier indicates the number of wounds: - A1: one wound - A2: two - A3: three - A4: four - A5: five - A6: six - A7: seven - A8: eight - A9: nine or more wounds Laterality modifiers (RT/LT) are typically not required for dressings. Use them only if a payer explicitly instructs you to do so. Check your MAC’s policy for any local instructions on narratives or documentation that must accompany the line item.

## **Other relevant codes** Codes commonly reviewed alongside A6197 (verify active status and payer rules): - A6196: Alginate or other fiber gelling dressing, wound cover, sterile, pad size 16 sq in or less, each. - A6198: Alginate or other fiber gelling dressing, wound cover, sterile, pad size greater than 48 sq in, each. - A6210–A6212: Foam wound cover (dressing material) categories by size. - A6216–A6224: Non-impregnated gauze dressings and gauze dressings impregnated with other than water (by size/type). - A6234–A6248: Composite and multi-layer covers (use when product is not alginate and meets composite criteria).

Frequently asked questions

A primary dressing is the material placed directly on the wound bed (e.g., alginate wound cover for exudative ulcers). It manages moisture and protects skin, often requiring a secondary dressing to secure.

A secondary dressing secures the primary layer, controls strike-through, and adds cushioning (bandage, adhesive film, or foam). Its role is to protect and maintain an optimal environment between dressing changes.

Coverage depends on the local coverage determination and whether the product category fits a payable HCPCS (often a foam or antibacterial foam code by size). Verify the LCD/Policy Article and document medical necessity with complete information.