Summary & Overview
CPT 78266: Gastric Emptying Study with Radiolabeled Meal
CPT code 78266 designates a nuclear medicine gastric emptying study in which a radiopharmaceutical-labeled meal is administered and serial imaging is used to evaluate stomach and intestinal emptying and motility. This diagnostic test is nationally relevant for evaluating patients with unexplained nausea, vomiting, early satiety, gastroparesis, or other suspected motility disorders and is commonly performed in outpatient imaging centers and hospital nuclear medicine departments. Coverage, coding, and utilization of this study affect clinical workflows and payer reimbursement across major national plans.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical indications and service context, common modifiers and billing considerations, and benchmarking and policy implications where available. The publication summarizes how the procedure is typically delivered, the usual sites of service, and billing nuances relevant to facility and professional claims.
This analysis is intended to inform coding, billing, and administrative stakeholders about the clinical role and billing context for CPT code 78266, and to surface the elements that influence coverage and claim processing at a national level. Data not available in the input will be identified as such in the relevant sections.
Billing Code Overview
CPT code 78266 describes a gastric emptying study in which the provider administers a liquid, solid, or semisolid meal containing a radiopharmaceutical tracer and evaluates the rate at which the stomach and intestines empty. The procedure captures serial images and monitors the passage of the radiolabeled meal to assess the function of gastric and intestinal motility and muscular activity.
Service type: Nuclear medicine diagnostic study (gastrointestinal transit/gastric emptying)
Typical site of service: Hospital outpatient imaging department, ambulatory imaging center, or nuclear medicine suite
Clinical & Coding Specifications
Clinical Context
A 45-year-old patient presents to gastroenterology with chronic nausea, early satiety, intermittent vomiting, and unexplained weight loss. The referring gastroenterologist suspects gastroparesis after history, physical exam, and initial labs. The patient arrives to the nuclear medicine department fasting per protocol. A standardized radiolabeled meal (solid egg-based or liquid/semiliquid tracer-containing meal) is prepared and administered orally by a technologist under supervision of a nuclear medicine physician. Sequential scintigraphic images are captured at specified intervals (commonly 0, 1, 2, and 4 hours) to quantify gastric emptying rates and assess for delayed gastric transit. The study may include right anterior oblique and anterior views, region-of-interest analysis, and calculation of percentage retained at each time point. Results are interpreted by the nuclear medicine physician, documented in the radiology report, and communicated to the referring gastroenterologist for treatment planning. Typical site of service is an outpatient imaging center, hospital nuclear medicine department, or ambulatory surgery center when performed as a diagnostic test requiring monitoring.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when only the physician interpretation/report is billed separately from technical elements |