CPT code 0301U designates a Proprietary Laboratory Analyses (PLA) assay for the Bartonella ddPCR test developed by Galaxy Diagnostics Inc. It identifies the presence of Bartonella henselae and Bartonella quintana using droplet digital PCR on specimens such as blood. As a PLA code, 0301U is unique to a single manufacturer's assay and defines billing and tracking for that specific laboratory service nationwide. National stakeholders monitor PLA codes like 0301U because they directly affect laboratory reporting, claims processing, and access to advanced molecular diagnostics for infectious disease.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for Bartonella testing, the service setting and type, payer coverage considerations, and standard modifiers commonly used with laboratory CPT reporting. The publication also summarizes common billing practices, reimbursement benchmarking areas where data are available, and policy or coding updates that affect proprietary laboratory assays. The content is structured for quick reference by coding professionals, laboratory managers, and health policy analysts seeking to understand how CPT code 0301U maps to clinical testing and payer interactions at a national level.