CPT code 78103 represents a diagnostic nuclear medicine bone scan performed after intravenous administration of a radiopharmaceutical that images multiple skeletal sites and may include multiple imaging phases. Bone scintigraphy is widely used nationally to detect metastatic disease, osteomyelitis, occult fractures, and other diffuse or focal skeletal abnormalities. The code matters because it captures a commonly ordered functional imaging study that influences oncology staging, infection workups, and trauma evaluation, and it drives reimbursement and utilization tracking across both commercial and public payers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a national overview of clinical context, payer coverage considerations, common billing modifiers, and the typical sites where the service is provided. The publication outlines benchmarks for utilization and payment where available, discusses policy and coding guidance relevant to nuclear medicine bone scintigraphy, and clarifies claims documentation and service descriptions to support accurate coding and billing. Data not available in the input is noted where applicable.