CPT code 95801 designates diagnostic sleep studies used to evaluate physiological function during sleep for suspected sleep disorders such as obstructive sleep apnea, prolonged respiratory pauses, parasomnias (sleepwalking), and insomnia. These studies play an important role in national efforts to identify and manage sleep-disordered breathing and other sleep pathologies that contribute to morbidity and impaired daytime function. Coverage and payment for sleep studies affect access to diagnosis and downstream treatment such as positive airway pressure therapy and behavioral interventions.

Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for CPT code 95801, typical sites of service (in-lab sleep laboratory and home-based portable monitoring), and the types of diagnostic information these studies capture. The publication also provides benchmarks and payer coverage patterns where available, summaries of relevant policy updates affecting test utilization, and practical clinical context to help stakeholders interpret billing and payment considerations for diagnostic sleep testing. Data not available in the input are identified where relevant.