CPT code 36512 represents therapeutic apheresis specifically performed for the removal of red blood cells. As a targeted blood-component removal procedure, it is clinically important for managing conditions where reduction of red cell mass is indicated and is performed in specialized hospital or infusion settings. Nationally, accurate coding for this procedure affects clinical reporting, utilization tracking, and payer reimbursement across major public and private payers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 36512, typical sites of service, and the common modifiers used with apheresis claims. The publication presents benchmarking metrics and payment policy considerations relevant to national payers, highlights documentation elements that support medical necessity for red blood cell apheresis, and summarizes typical billing practices. This resource is intended for billing professionals, clinical coders, and policy analysts who need a clear, national-level summary of how CPT code 36512 is described, where it is performed, and what stakeholders commonly consider when processing claims.