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.