HCPCS Level II code T4538 designates a reusable diaper supplied and billed on a per-diaper basis. Nationally, this code is used to document durable medical supply provision for patients who require washable continence products, often in home health, hospice, or long-term care contexts. The code matters because it clarifies billing for reusable incontinence supplies distinct from disposable alternatives and supports appropriate claims processing for payers and suppliers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of coverage and billing contexts across major commercial and federal payers, common modifiers associated with supply billing, and practical coding considerations relevant to durable medical equipment and personal care supplies. The publication also outlines where reusable diaper billing intersects with home health and long-term care service lines and highlights documentation and claim submission elements commonly reviewed by payers.

This summary provides national-level context — benchmarks, policy implications, and clinical relevance — to help billing professionals, suppliers, and policy analysts understand the role of T4538 in reimbursement workflows and care delivery for patients requiring reusable continence products.