Suppliers frequently have questions regarding coverage, documentation, and billing requirements for external infusion pumps. To support accurate claim submission and reduce denials, we have compiled key points based on recent education sessions and updates.

Coverage & Documentation Requirements

Medicare covers external infusion pumps when specific medical necessity requirements are met. As outlined in the External Infusion Pumps Coverage Criteria, suppliers must ensure a complete Standard Written Order (SWO) is obtained before billing. Claims submitted without an SWO will be denied as not reasonable and necessary.

Suppliers must also maintain detailed documentation, including beneficiary authorization, medical records, SWO, refill requests, and Proof of Delivery (POD). The Documentation Checklist for External Infusion Pumps outlines required elements and provides links to the policy and additional resources.

Billing Clarifications & Common Supplier Concerns

Claims for K0552 (supplies for external non‑insulin infusion pumps, syringe‑type cartridges) are not separately payable when the drug is already provided in a pre‑packaged syringe‑type cartridge. This clarification helps suppliers determine when K0552 and A4222 (infusion supplies for external drug infusion pump, per cassette or bag) may or may not be billed together. Documentation must always support the method of drug delivery.

Reminders

Suppliers are encouraged to refer to the Local Coverage Determination (L33794) for medical necessity requirements and Policy Article A52507 for detailed billing guidance.

A reminder that suppliers can use policy‑based education to resolve many scenario‑based questions. Suppliers requiring claim‑specific guidance may contact the Supplier Contact Center for additional support.