CPT code 94762 covers overnight pulse oximetry monitoring in which a provider monitors a patient’s oxygen saturation using a sensor on the ear or finger. This code captures a commonly used diagnostic service for assessing nocturnal hypoxemia, sleep-disordered breathing, and oxygenation in patients with cardiopulmonary or sleep-related conditions. Nationally, use of overnight oximetry affects care pathways by informing need for further testing, supplemental oxygen, or sleep medicine referrals.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines coverage and billing considerations across these major payers and summarizes common modifiers used with this service. Readers will find an executive overview of clinical context, typical sites of service, and the operational implications for labs and clinics that perform home or in-facility overnight oximetry. The piece also highlights benchmarks and policy updates where available, and clarifies where input data is not available.

This summary provides clinicians, billing staff, and policy analysts with a concise reference to understand what CPT code 94762 represents, which payers are relevant to national coverage discussions, and what to expect when evaluating overnight oxygen saturation monitoring in practice.