Summary & Overview
CPT 91022: Duodenal Motility Study Using Manometry
CPT code 91022 represents a duodenal motility study using manometry to assess stomach and duodenal muscle pressure and movement. Nationally, this diagnostic procedure is important for evaluating patients with suspected gastric or small‑bowel motility disorders such as gastroparesis, pseudo‑obstruction, or unexplained nausea and vomiting. The code captures an objective physiologic test that can guide clinical management and specialist referral.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the test, typical sites of service, and what payers commonly consider when covering motility studies. The publication summarizes available benchmarks and utilization patterns where present, highlights relevant policy considerations affecting coverage and prior authorization, and outlines coding and billing elements that affect claims processing.
This summary is intended for clinicians, billing professionals, and policy analysts seeking a concise reference for CPT code 91022, its clinical purpose, and the payer landscape relevant to authorization and reimbursement practices.
Billing Code Overview
CPT code 91022 describes a duodenal motility study in which the provider uses a manometer to measure and analyze stomach and duodenal muscle pressure and movement. This service evaluates the contractile activity and coordination of the stomach and proximal small intestine to diagnose abnormal motility or neuromuscular function.
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Service type: Diagnostic physiologic motility testing
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Typical site of service: Hospital outpatient department, ambulatory surgical center, or specialized gastrointestinal motility laboratory where manometry equipment and monitoring personnel are available.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45-year-old with chronic postprandial bloating, early satiety, intermittent nausea and non-bilious vomiting refractory to proton-pump inhibitor therapy. The gastroenterologist evaluates the patient in an outpatient endoscopy or motility clinic and documents a history suggestive of gastric emptying delay or small bowel dysmotility. After initial evaluation (history, physical exam, basic labs and possibly upper endoscopy), the provider schedules a duodenal/gastric manometry study to measure intraluminal pressure and coordination of stomach and proximal small intestinal smooth muscle.
The procedure is performed by a gastroenterologist or motility specialist in an ambulatory procedure room or hospital outpatient department. A thin manometry catheter is positioned transnasally or orally into the stomach and duodenum under fluoroscopic or radiographic confirmation. The manometer records pressure tracings during fasting and after a standardized test meal or pharmacologic provocation to assess motor patterns. The study typically requires patient monitoring for discomfort, potential topical anesthesia, and post-procedure recovery time. Findings guide diagnosis of gastroparesis, antroduodenal dysmotility, or intestinal pseudo-obstruction and inform medical, endoscopic, or surgical management decisions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Additional identification of the professional provider’s usual (primary) service |