Summary & Overview
HCPCS G8845: Positive Airway Pressure Therapy Prescribed
HCPCS Level II code G8845 indicates a prescription for positive airway pressure (PAP) therapy, a common intervention for sleep-disordered breathing and other conditions requiring noninvasive respiratory support. Nationally, accurate coding for PAP prescriptions is important for care continuity, device provision, and claims processing across commercial and public payers. This analysis covers major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find a concise explanation of what G8845 represents, typical clinical and site-of-service contexts for its use, and the payer landscape relevant to coverage and billing. The publication provides benchmarks and common billing practices, notes on modifier usage where applicable, and clinical context to help billing staff and policy analysts understand when this code is submitted. It also highlights areas where policy updates and payer-specific rules commonly affect claim adjudication. Data not available in the input will be identified as such rather than inferred.
Billing Code Overview
HCPCS Level II code G8845 denotes positive airway pressure therapy prescribed. This code represents the prescription of noninvasive positive airway pressure (PAP) therapy intended to treat sleep-disordered breathing or other conditions requiring airway support.
Service type: Durable medical equipment prescription / therapeutic respiratory service
Typical site of service: Home health or outpatient setting where PAP therapy is initiated or managed
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with symptomatic obstructive sleep apnea (OSA) or another sleep-disordered breathing diagnosis who is evaluated in a sleep medicine clinic or pulmonary clinic after a diagnostic polysomnography (in-lab sleep study) or home sleep apnea test. The clinician prescribes positive airway pressure (PAP) therapy when the study demonstrates clinically significant apnea–hypopnea index or hypoxemia. Workflow: the sleep medicine or pulmonology provider documents the diagnostic findings, medical necessity, and a written prescription for PAP device and settings (CPAP, APAP, or bilevel as indicated). The prescription is transmitted to durable medical equipment (DME) supplier and payer for coverage review. The DME coordinates patient education, mask fitting, device setup, and home initiation. Follow-up visits or remote monitoring assess adherence, symptom response, side effects, and any need for pressure adjustments or alternate modalities (e.g., bilevel PAP). Billing for the prescription event or associated counseling and coordination may use G8845 to indicate that positive airway pressure therapy was prescribed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when documentation supports substantially greater work or complexity related to counseling or coordination associated with a PAP prescription. |