Wound care kits and Medicare: how kit components are covered

The LCD's kit rule

LCD L33831 puts it in one sentence. When surgical dressings are provided in kits, only the components that:

• meet the definition of a surgical dressing,
• are ordered by the treating practitioner, and
• are reasonable and necessary

are covered. The sentence just before it states the principle: “Surgical dressings must be tailored to the specific needs of an individual beneficiary.”

The definitions come from Policy Article A54563. Primary dressings are “Therapeutic or protective coverings applied directly to wounds or lesions,” and secondary dressings are materials that “serve a therapeutic or protective function and that are needed to secure a primary dressing.”

Each component, its own code

In practice, a kit isn't billed as a single item. Each covered component is billed with its own HCPCS code, in its own quantity, and two Policy Article rules apply line by line:

• The A1–A9 modifier “must correspond to the number of qualifying wounds on which the dressing HCPCS code is being used, not the total number of wounds treated.”
• If a dressing is divided into pieces, “the code and quantity billed must represent the originally manufactured size and quantity.”

Collagen dressing codes A6021–A6024 also need a PDAC listing for the specific product. Our collagen guide shows how to check it.

Cleanser and gauze

The Policy Article lists “Wound cleansers (A6260) or irrigating solutions” among wound care items that are non-covered under the surgical dressing benefit because they do not meet the statutory definition of a dressing. Medicare does not cover wound cleansers under the surgical dressing benefit, including when they come in a kit.

Gauze counts as a dressing only when it's used as one. The same list includes “Gauze or other dressings used to cleanse or debride a wound but not left on the wound.” When dressings are provided in a noncovered situation, such as using gauze to cleanse a wound, the Policy Article says “a GY modifier must be added to the code,” with a brief description of the reason for non-coverage.

Quantities follow the order, not the box

A kit's counts are fixed. What can be billed depends on the order and the documented change frequency, and the LCD's usual maximums differ by component. For example:

• A specialty absorptive dressing: up to once per day without an adhesive border, and up to every other day with one.
• Non-impregnated gauze without a border: up to 3 times per day. The LCD adds that it's usually not reasonable and necessary to stack more than 2 gauze pads in any one area.
• Collagen: the LCD states no usual maximum change frequency. It says collagen dressings “can stay in place up to 7 days.”

When products are combined on a wound, “the product in contact with the wound determines the change frequency,” and the LCD adds: “It is not reasonable and necessary to use a combination of products with differing change intervals.”

Two more lines set the ceiling. Suppliers “must not dispense a quantity of supplies exceeding a beneficiary's expected utilization” (LCD L33831), and reimbursement “shall be based on the specific utilization amount that is supported by contemporaneous medical records” (A55426).

One month at a time

For home use, “no more than a month's supply of dressings may be provided at one time,” unless the record documents why an individual patient needs more in the home setting. A month's supply is set by the patient's documented use, not by the box: the quantity “must take into account the status of the wound(s), the likelihood of change, and the recent use of dressings.”

Each PCSS kit packs fixed counts for one patient. Those counts aren't Medicare quantities: check each component against the order and the documented change frequency before it ships.

Kits for home use vs. the office

• Applied as part of a billed service. When a treating practitioner applies surgical dressings as “part of a professional service that is billed to Medicare,” they are incident to that service and “are not separately payable.” Office stock is a cost of the visit.
• Sent home. Dressings sent home with the patient may be billed, with the patient's residence as the place of service, not the office (POS 11).
• Home health or hospice. For a patient under a home health plan of care, the agency supplies dressings through consolidated billing; supplies related to a hospice patient's terminal condition come from the hospice. See who supplies what.

For home use, a kit can go straight to the patient through our patient-direct model. Your office sends the order with the face sheet and plan of care; PCSS with its billing partners ships to the patient and bills the patient's coverage.

PCSS's three kits

Each kit pairs a collagen primary dressing with a silicone absorbent secondary, plus cleanser and gauze, matched in one box per patient. CMS10 and CMS11 are 30-day supplies; CPS10 is a 40-day supply. Quantities in parentheses are what's packed in each kit.

Coding notes by component:

These are the quantities packed in each kit, not what Medicare will cover. Confirm codes and quantities with PCSS and your billing staff before you order. The quantity calculator estimates a month's supply from a documented change frequency, and the ordering guide explains stock orders through the wholesale portal and the separate patient-direct workflow.

Questions

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.