Summary & Overview
CPT 79300: Interstitial Brachytherapy Implantation
CPT code 79300 denotes interstitial brachytherapy implantation in which colloidal radioactive material in wires, tubes, or seeds is placed directly over a tumor to provide focused radiation therapy. This procedure is clinically significant for localized cancer management and is performed in settings equipped for radiation delivery, typically hospital operating rooms or radiation oncology suites. Nationally, the code is relevant to payers and providers involved in oncology care coordination, radiation therapy billing, and procedural reimbursement policy.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for use of the code, the typical sites of service, common billing modifiers associated with the service line (listed separately), and the payer landscape relevant to claims processing. The publication summarizes coding intent, common clinical scenarios for interstitial brachytherapy, and what to expect in payer coverage patterns and documentation requirements.
The report is aimed at billing managers, clinical coders, radiation oncology clinicians, and policy analysts seeking concise guidance on clinical meaning and billing context for CPT code 79300. Data not available in the input includes specific associated taxonomies, ICD-10 diagnoses, related codes, and service-line financial benchmarks.
Billing Code Overview
CPT code 79300 describes a procedure in which a provider implants a colloidal radioactive substance contained in wires, small tubes, or seeds directly over the tumor area. This technique is a form of brachytherapy intended to deliver localized radiation to a tumor while minimizing exposure to surrounding healthy tissues.
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Service type: Interstitial brachytherapy implantation
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Typical site of service: Hospital operating room or specialized radiation oncology suite
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a localized prostate carcinoma is referred for brachytherapy implantation of radioactive seeds. The patient has undergone preoperative imaging (transrectal ultrasound and CT) to map tumor location and prostate volume. On the day of service the patient presents to an ambulatory surgical center or hospital operating room. Under spinal or general anesthesia, the radiation oncologist and urologist use transrectal ultrasound guidance to place radioactive seeds (I-125 or Pd-103) in needles or strands directly into the prostate peripheral zone covering the tumor and margin. The procedure includes intraoperative dosimetry verification and documentation of seed placement. Postprocedure, the patient is monitored for urinary retention, bleeding, and seed migration, receives discharge instructions, and has planned follow-up with radiation oncology for dosimetric review and oncologic surveillance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Provider performed more complex than usual service | Use if the implantation required significantly greater complexity (e.g., extensive anatomic distortion) documented by the surgeon. |