Summary & Overview
HCPCS G6005: Radiation Treatment Delivery, Single Port or Parallel Opposed Ports
HCPCS Level II code G6005 represents a specific external beam radiation therapy delivery: treatment to a single area using a single port or parallel opposed ports with simple blocks or no blocks at energies of 11–19 MeV. This code captures a common, lower-complexity radiation treatment technique used in oncology care and is relevant for billing outpatient radiation therapy sessions.
Key payers included in the national overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage patterns, typical billing practice considerations, and clinical context for using a simple external beam technique represented by G6005.
Readers will find benchmarks for utilization and reimbursement where available, summaries of relevant policy or coverage updates that affect payment and documentation, and clinical context to clarify when this simpler treatment delivery is appropriate versus more complex techniques. Data not available in the input will be noted as such. The content is intended for providers, billing staff, and policy analysts seeking a concise reference for coding, billing, and policy considerations for HCPCS Level II code G6005 nationwide.
Billing Code Overview
HCPCS Level II code G6005 describes radiation treatment delivery for a single treatment area using a single port or parallel opposed ports, with simple blocks or no blocks, delivered at energy levels of 11–19 MeV.
Service type: External beam radiation therapy (simple technique)
Typical site of service: Outpatient radiation oncology department or hospital-based radiation therapy suite
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a localized superficial malignancy or palliation target (for example, a small breast or chest wall recurrence, superficial skin carcinoma, or a palliative bone metastasis near the skin surface) referred to radiation oncology for a single high-energy external beam treatment. The prescription is for a single treatment area using a single port or parallel-opposed ports with simple shielding or no custom blocks, using a linear accelerator producing photons in the 11–19 MeV range. The clinical workflow begins with a consultation and treatment planning visit (history, physical exam, review of prior imaging), immobilization and simple simulation (clinical marking or 2D simulation), basic dosimetry to confirm beam parameters, setup verification (portal imaging or light field alignment), delivery of the single treatment fraction, and brief post-treatment assessment and documentation of acute effects and discharge instructions. Typical sites of service include hospital outpatient departments and freestanding radiation oncology centers with a linear accelerator capable of delivering 11–19 MeV photon therapy. Clinical staff involved include the radiation oncologist, medical physicist or dosimetrist for beam setup, radiation therapists for simulation and delivery, and nursing for patient support.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Service performed by the physician | Attach when the radiation oncologist personally performs the treatment delivery or documents professional responsibility for the session |