Summary & Overview
HCPCS G0237: Respiratory Muscle Strengthening, One-on-One, per 15 min
HCPCS Level II code G0237 captures one-on-one therapeutic procedures aimed at increasing the strength or endurance of respiratory muscles, billed in 15-minute units and inclusive of monitoring. This service is an individual component of pulmonary rehabilitation and respiratory therapy delivered under a physician’s plan of care in outpatient office settings. Nationally, the code is relevant for clinicians managing patients with significant respiratory muscle weakness or dysfunction where targeted strengthening or endurance training is part of the therapeutic plan.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of coding intent and clinical context, typical billing practices and site-of-service considerations, common adjunct codes and service line notes where available, and payer coverage patterns and policy language highlights. The publication also outlines related codes for other respiratory therapeutic services to aid in correct code selection and bundling decisions.
This summary provides clinicians, billing staff, and policy analysts with concise guidance on the clinical scope of G0237, how it fits into pulmonary rehabilitation program components, and the payer landscape nationally. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code G0237 describes therapeutic procedures to increase strength or endurance of respiratory muscles, delivered face-to-face in a one-on-one setting. The code is reported in 15-minute increments and includes monitoring as part of the service.
Service type: Respiratory therapy / pulmonary rehabilitation individual component
Typical site of service: Outpatient setting under a physician plan of care, commonly billed on the CMS 1500 form with Place of Service 11 (Office).
Clinical & Coding Specifications
Clinical Context
A patient with respiratory muscle weakness following a prolonged hospitalization for pulmonary mycobacterial infection presents to an outpatient physician’s office for pulmonary rehabilitation. The physician’s plan of care orders individual therapeutic respiratory muscle training to increase inspiratory and expiratory strength and endurance. A respiratory therapist provides one-on-one, face-to-face sessions of device-guided inspiratory muscle training and coached breathing exercises, with continuous monitoring of vital signs and technique. Each 15-minute block of monitored therapy is documented with start and stop times, therapeutic activities performed, patient response, and any adverse events. Services are delivered in an outpatient clinic (Place of Service 11) and billed on a CMS 1500 claim under a physician plan of care.
Coding Specifications
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HCPCS Level II code:
G0237— Therapeutic procedures to increase strength or endurance of respiratory muscles, face to face, one on one, each 15 minutes (includes monitoring). -
Common modifiers and when to use them:
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59— Distinct Procedural Service -
Use when two procedures that are not normally reported together are performed on the same day and meet documentation criteria demonstrating a distinct service or separate session from another procedure. Documentation must justify the distinct nature of the service.
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76— Repeat Procedure by Same Physician