Headline: CPT code 77336: Weekly Medical Physics Consultation During Radiation Therapy

Lead: CPT code 77336 reports ongoing medical physics consultation provided while a patient receives a course of radiation therapy. The service is typically billed once per week after a full week of treatments and captures the medical physicist’s review of treatment documentation, dosimetry, and delivery issues.

What it represents and why it matters: CPT code 77336 designates the periodic, typically weekly, oversight performed by a medical physicist to ensure that radiation therapy is delivered according to the prescribed plan and safety standards. This code supports clinical quality assurance in radiation oncology and has implications for billing workflows, resource allocation, and documentation during multi-fraction treatment courses.

Key payers covered: Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

What readers will learn: This publication provides benchmarks and billing guidance context for CPT code 77336, outlines common billing patterns and modifiers, and summarizes the clinical role of ongoing physics review during radiation treatment. It also presents typical sites of service and the operational cadence for weekly reporting after an established set of treatment sessions.

Policy and clinical context overview: The content focuses on national-level billing and clinical context for ongoing medical physics consultation, emphasizing the service’s role in treatment quality assurance and routine weekly documentation during multi-session radiation therapy.