CPT code 86900 denotes laboratory ABO blood group typing performed on serum or plasma. This basic immunohematology test identifies a patient’s A, B, AB, or O blood group and is essential for transfusion safety, pretransplant evaluation, prenatal assessment, and many inpatient and outpatient clinical workflows. Nationally, ABO typing is a high-volume, routine laboratory service integral to blood banking and perioperative care.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides an operational and policy-focused view of CPT code 86900, covering clinical context, common sites of service, typical billing and service-line implications, and where available, payer coverage patterns and claims-handling considerations. It also summarizes common modifier usage and ancillary coding topics when relevant.

Readers will learn what CPT code 86900 represents clinically, how it is commonly deployed across laboratory and hospital settings, which payers commonly reimburse for the service, and what operational benchmarks and coding considerations typically accompany ABO blood typing. Data not available in the input will be noted where applicable.