CPT code 74170 covers computed tomography of the abdomen performed both without and with intravenous contrast. This dual-phase CT is a common diagnostic tool for evaluating a wide range of abdominal conditions — from acute abdominal pain and suspected infection to characterization of masses and staging of malignancy — and carries significant national relevance due to high utilization in emergency and outpatient imaging settings. Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical and billing intent of the code, typical sites of service, and the payer landscape addressed. The publication outlines common reimbursement considerations, typical modifiers used in practice (listed separately), and operational factors that affect billing, such as technical versus professional components and site-of-service influences. It also summarizes benchmarking context and highlights policy updates and coverage nuances that commonly affect authorization and payment across major national payers. Data not available in the input is noted where applicable; the focus remains on clarifying the service captured by CPT code 74170, how it is commonly delivered, and what elements influence billing and coverage decisions at a national level.