CPT code 85302 reports a laboratory test measuring protein C antigen levels in patient plasma to evaluate protein C quantity for coagulation assessment; this service is a clinical pathology laboratory assay typically performed in a clinical laboratory or hospital lab setting and involves specimen processing and immunoassay or antigen detection methods.

For related coverage guidance, see recent payer policy updates: Epithelial Cell Cytology in Breast Cancer Risk Assessment, Antibody-Drug Conjugates, Chemotherapy Observation or Inpatient Hospitalization (for New Mexico Only).