CPT code 91030 identifies the Bernstein test, an esophageal acid perfusion procedure used to reproduce symptoms of heartburn and differentiate acid reflux from other causes of chest discomfort. This diagnostic test remains clinically relevant for patients with atypical chest pain or refractory heartburn when objective provocation can clarify the role of acid exposure in symptom generation. Nationally, the code matters because it informs coverage, billing, and diagnostic pathways in gastroenterology and primary care referrals.

Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent, typical service setting, and common billing contexts for CPT code 91030. The publication summarizes payer coverage considerations, reimbursement benchmarks where available, and the clinical scenarios in which the Bernstein test is most commonly applied. It also outlines typical sites of service and the procedural purpose — to provoke and document acid-related symptoms — providing clinicians and billing professionals with the operational context needed to code and document appropriately.

This summary is aimed at payers, gastroenterology clinicians, coding teams, and policy analysts seeking a clear, national-level briefing on CPT code 91030, its clinical role, and its relevance to payment and diagnostic decision-making.