Summary & Overview
CPT 32701: Target Delineation for Radiation Therapy Planning
CPT code 32701 denotes target delineation for radiation therapy planning, a clinical process that defines tumor borders, tumor volume, and local extension to guide radiation delivery. Accurate delineation is essential for effective cancer treatment and minimizing exposure to healthy tissue, making this code central to radiation oncology workflows nationwide. The code applies primarily in outpatient and hospital-based radiation oncology settings where imaging and clinical expertise are combined to prepare treatment plans.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical task represented by the code, typical sites of service, and which payers commonly cover these services. The publication provides benchmarks and payer-specific considerations where available, notes on documentation expectations, and clinical context for why target delineation influences treatment quality and resource use. Data not available in the input is clearly identified where relevant. This national-level overview is intended for billing staff, radiation oncologists, and policy analysts seeking a clear summary of what CPT code 32701 represents and its role in radiotherapy service lines.
Billing Code Overview
CPT code 32701 describes target delineation for radiation therapy planning. This service identifies the borders and volume of tumors and assesses extension into adjacent structures to determine precise radiation treatment targets. The work involves imaging review and clinical correlation to map the three-dimensional area to be treated.
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Service type: Radiation therapy planning, target delineation
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Typical site of service: Outpatient radiation oncology clinic or hospital-based radiation oncology department
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with a newly diagnosed non-small cell lung carcinoma is referred to radiation oncology for definitive treatment planning. The radiation oncologist reviews diagnostic chest CT and PET/CT images, assesses prior biopsy and staging information, and performs target delineation to define gross tumor volume (GTV), clinical target volume (CTV), and planning target volume (PTV). The workflow includes image fusion of diagnostic imaging into the treatment planning system, contouring of tumor and at-risk normal tissues, multidisciplinary review as needed, and generation of three-dimensional delineations to guide external beam radiation therapy fields or stereotactic body radiotherapy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal or uncomplicated service | Use when the target delineation is part of a standard, routine planning session without unusual effort. |
22 | Increased procedural services | Use when target delineation requires substantially greater effort or complexity than typical (extensive image fusion, multiple image sets, complex contours). |