CPT code 43238 denotes endoscopic ultrasound (EUS) with ultrasound-guided intramural or transmural fine needle aspiration or biopsy of the esophagus, stomach, or duodenum. This advanced diagnostic and sampling technique is important nationally for staging gastrointestinal malignancies, diagnosing subepithelial lesions, and obtaining tissue from peri-gastric or peri-esophageal structures that are difficult to access by other methods. It represents a higher-complexity, image-guided endoscopic service frequently performed in hospital outpatient departments and ambulatory surgical centers.

Key payers included in the discussion are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service setting, common payer coverage patterns, and typical billing considerations tied to EUS-guided fine needle aspiration/biopsy. The publication outlines expected clinical uses, where the procedure is typically performed, and the types of procedural documentation and coding elements that drive reimbursement and quality reporting. Data not available in the input is noted where relevant. The focus is national in scope and intended for clinicians, billing professionals, and policy analysts engaged with advanced endoscopic procedures.