Summary & Overview
CPT 43231: Endoscopic Ultrasound of the Esophagus
CPT code 43231 represents diagnostic endoscopic ultrasound (EUS) of the esophagus, a combined endoscopic and ultrasonographic procedure used to image the esophageal wall and nearby structures. Nationally, EUS is a critical tool for staging esophageal disease, evaluating submucosal lesions, and guiding clinical decision-making; accurate coding supports appropriate clinical documentation and payer adjudication. Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find: benchmarks for utilization and reimbursement patterns across common commercial payers and Medicare; clinical context describing when EUS of the esophagus is performed and typical sites of service; and notes on common modifiers and billing considerations when available. The publication provides an operational reference for coding and billing teams, revenue cycle managers, and clinical leaders responsible for procedural documentation. Data not available in the input is noted where applicable, and the content focuses on national implications rather than state-specific rules. This resource aims to clarify the clinical definition of CPT code 43231, outline payer coverage scope, and surface practical billing elements relevant to facilities and professional providers performing esophageal EUS.
Billing Code Overview
CPT code 43231 describes an endoscopic ultrasound (EUS) of the esophagus performed by inserting a flexible endoscope through the mouth into the esophagus and advancing an ultrasound transducer through the endoscope to obtain ultrasonographic images. This procedure combines endoscopy and sonography to evaluate the esophageal wall and adjacent structures.
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Service type: Endoscopic ultrasound (diagnostic EUS)
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Typical site of service: Ambulatory surgery center or hospital endoscopy suite (procedural outpatient setting)
Clinical & Coding Specifications
Clinical Context
A 62-year-old male with progressive dysphagia and unexplained weight loss is referred for an endoscopic ultrasound. The gastroenterologist performs an upper endoscopy with a flexible endoscope introduced through the mouth into the esophagus, then advances an ultrasound transducer through the endoscope to obtain high-resolution sonographic images of the esophageal wall and adjacent mediastinal structures. Indications include evaluation of suspected esophageal cancer, staging of known esophageal or gastric malignancy, assessment of submucosal lesions, or sampling of suspicious lymph nodes via fine-needle aspiration if indicated. Typical workflow: pre-procedure history and consent, NPO status, moderate sedation or monitored anesthesia care, endoscopic insertion and EUS imaging +/- EUS-guided biopsy, post-procedure recovery and discharge with follow-up instructions. Typical site of service is an ambulatory endoscopy suite or hospital outpatient department staffed by a gastroenterologist and support personnel.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — standard reporting | Use when no special circumstances apply and standard global rules apply |
11 | Normally assigned for a basic service |