2025 CPT code 77399
(Active) Effective Date: N/A Radiology Procedures > Radiation Oncology Treatment Feed
Unlisted procedure, medical radiation physics, dosimetry, treatment devices, and special services.
Modifiers may be applicable to 77399. Modifier 26 should be used if reporting only the professional component. Other modifiers, such as 79 (unrelated procedure) or TC (technical component), may be applicable depending on the specific circumstances of the service.
Medical necessity for 77399 must be clearly documented. The documentation should justify why a specific, listed CPT code is not appropriate for the service provided. It should also explain the unique circumstances requiring the specialized procedure and how it contributes to the patient's treatment plan.
The provider performing services under this code is responsible for specialized tasks in medical radiation physics, dosimetry, treatment devices, and special services not covered by other CPT codes. This includes complex calculations, device design, and quality assurance, all crucial for precise and safe radiation therapy.
In simple words: This code represents a specialized service in radiation therapy where experts ensure the safe and effective delivery of radiation treatment. They use advanced techniques to calculate the precise dose of radiation needed and may design custom devices for treatment. This personalized approach helps target cancer while protecting healthy tissues.
This code is used for reporting procedures related to medical radiation physics, dosimetry, treatment devices, and special services that do not have a specific CPT code. It encompasses specialized tasks related to treatment planning, including measuring and calculating radiation doses, designing treatment devices, and ensuring quality assurance. This code is essential for accurate targeting of cancerous tissues while minimizing exposure to healthy tissues.
Example 1: A patient with a complex tumor shape requires a customized radiation device to ensure accurate dose delivery, and 77399 is used to report the design and implementation of this device., A patient receives radiation therapy near a critical organ, necessitating complex dosimetry calculations and specialized shielding not adequately described by existing codes; 77399 is used., A novel radiation therapy technique is employed, requiring specialized physics consultations and quality assurance procedures not encompassed by standard codes, and 77399 is reported.
Documentation must support the medical necessity of using an unlisted code. This includes a detailed description of the procedure, the reason why existing codes are not applicable, and a comparison to similar procedures with established CPT codes. Supporting diagnostic images and treatment plans should also be included.
- Revenue Code: P7A (Oncology - Radiation Therapy)
- Specialties:Radiation Oncology, Medical Physics
- Place of Service:Inpatient Hospital, Outpatient Hospital, Freestanding Radiation Therapy Center