CPT code 84075 represents a laboratory assay measuring alkaline phosphatase activity in serum, a widely used biochemical test for assessing liver function, bone metabolism, and certain intestinal or pulmonary processes. As a common component of basic metabolic or hepatic panels, this test matters nationally for clinical diagnosis, care coordination, and laboratory reimbursement frameworks.

Key payers typically involved in coverage and reimbursement include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a clinical context for when the assay is ordered, typical sites of service, and an overview of payer coverage scopes. The publication summarizes common billing and coding considerations, benchmark rate themes, and policy updates affecting laboratory testing reimbursement. It also outlines operational implications for laboratories and health systems, including ordering patterns and reporting expectations.

This resource is intended for health policy analysts, revenue cycle managers, laboratory directors, and clinicians seeking a concise reference on CPT code 84075, its clinical uses, and the payer environment that shapes access and payment for alkaline phosphatase testing.