Summary & Overview
CPT 91030: Bernstein Test for Acid-Induced Heartburn
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.
Billing Code Overview
CPT code 91030 describes a Bernstein test, a provocative esophageal acid perfusion procedure performed to reproduce symptoms of acid indigestion and heartburn. The provider introduces acid into the esophagus to determine whether symptoms such as chest pain or burning are attributable to acid reflux.
Service Type: Diagnostic provocative esophageal testing
Typical Site of Service: Outpatient gastroenterology clinic or ambulatory procedure suite
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Clinical & Coding Specifications
Clinical Context
A 45-year-old patient presents to a gastroenterology clinic with a six-month history of retrosternal burning and regurgitation that is worse after meals and when lying supine. Prior empirical therapy with over-the-counter antacids produced partial, transient relief. The gastroenterologist performs a focused history and physical, reviews prior medication trials, and discusses instrumental testing. To reproduce esophageal pain and help distinguish gastroesophageal reflux disease (GERD) from nonacidic or functional chest pain, the provider performs a Bernstein (acid perfusion) test in an outpatient endoscopy or procedure suite. The test involves perfusing dilute hydrochloric acid into the distal esophagus via a catheter while monitoring the patient’s symptom reproduction and comparing responses to saline perfusion. The typical workflow includes patient consent, topical anesthetic as needed, catheter placement with or without topical anesthesia, sequential saline and acid perfusions, symptom assessment, and documentation of findings. Typical sites of service are an outpatient gastroenterology clinic, ambulatory surgery center, or hospital outpatient department. The patient scenario commonly includes evaluation of persistent heartburn, chest pain suspected to be esophageal in origin, or equivocal response to acid-suppression therapy; testing informs diagnostic decisions and management planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing separately for the physician’s interpretation if a technical component is billed by the facility or another entity |