CPT code 0027U is a Proprietary Laboratory Analyses (PLA) code for the Mayo Clinic’s JAK2 Exons 12–15 Sequencing (JAKXR) test, a molecular diagnostic sequencing assay used to detect variants in JAK2 associated with myeloproliferative and other hematologic disorders. As a PLA code, 0027U identifies a single manufacturer- or lab-specific test, which matters for payer coverage, coding specificity, and lab-level reporting across the United States.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical purpose of the test, the typical laboratory setting for service delivery, and the payer landscape relevant to molecular diagnostics. The publication also outlines common billing modifiers and highlights where input data is not available.

This analysis is designed to inform coding staff, laboratory billing teams, and policy analysts about the code’s clinical role, expected sites of service, and the payers commonly involved in reimbursement discussions. Content includes benchmarks and policy context when available, but specific utilization and payer-specific coverage details are not provided in the input and are noted as unavailable.