CPT code 43243 denotes therapeutic upper gastrointestinal endoscopy with injection of a sclerosing solution into esophageal or gastric varices. This procedure is a targeted endoscopic intervention used to control active bleeding or reduce rebleeding risk from portal hypertension–related varices and is an important component of the acute and elective management of gastrointestinal hemorrhage. Nationally, the code is relevant to hospitals, outpatient endoscopy centers, and payers managing costs and quality of acute GI bleeding care. Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for use of the code, typical sites of service, common billing modifiers and related administrative considerations, and a summary of payer coverage patterns where available. The publication summarizes benchmarks on utilization and reimbursement trends when present, highlights policy and documentation drivers that affect claim adjudication, and outlines coding relationships to other upper endoscopy and variceal treatment services. Data not available in the input is noted where applicable.