HCPCS Level II code S5501 represents a per diem service for complex home infusion catheter care and maintenance (more than one lumen), encompassing administrative services, professional pharmacy services, care coordination, and necessary supplies and equipment. This code is significant for national clinicians, home infusion providers, and payers because it standardizes billing for a bundled per diem related to catheter maintenance while separating drug and nursing visit charges. Clear coding supports appropriate reimbursement, care coordination, and supply management across home infusion programs.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines how these payers typically handle coverage and billing considerations for home infusion catheter maintenance and highlights common modifiers used in practice. Readers will find benchmarks for utilization and reimbursement patterns, summaries of relevant policy updates affecting home infusion services, and clinical context explaining when a complex, multi-lumen catheter requires specialized maintenance billed under this per diem code. Practical coding considerations are provided, and where specific input data is not supplied, the text notes that those elements are not available in the input.