CPT code 86886 represents the indirect antiglobulin (Coombs) test performed with serial dilutions of patient serum against test red blood cells to detect and characterize red cell–reactive antibodies. This laboratory serology procedure is a key diagnostic tool for immune-mediated hemolysis, pre-transfusion antibody identification workflows, and other immunohematology investigations, making it important for hospital and clinical laboratory operations nationwide. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise clinical and billing overview of the test, typical sites of service, and the implications for laboratory workflows. The publication summarizes national benchmarks and reimbursement context where available, highlights clinical relevance in transfusion and hemolytic anemia evaluation, and notes common billing modifiers used with laboratory procedures. Data limitations and missing input fields are explicitly identified where applicable. The piece is intended to inform laboratory managers, coding specialists, and health policy analysts about the role of CPT code 86886 in clinical practice and payer interactions, without making operational recommendations.