Summary & Overview
CPT 78265: Gastric Emptying Study with Radiolabeled Meal
CPT code 78265 denotes a nuclear medicine gastric emptying study in which a patient ingests a radiolabeled liquid, solid, or semisolid meal and serial imaging tracks gastric and small-bowel transit. This procedure is clinically important for diagnosing disorders of gastric motility such as gastroparesis and for guiding management of chronic nausea, vomiting, and unexplained postprandial symptoms. It also has implications for utilization and reimbursement in outpatient imaging and hospital settings nationwide.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical purpose and service setting, common billing and coding considerations, and where to look for policy guidance from major payers. The report summarizes typical sites of service and service type, highlights common modifiers used with this code, and identifies areas where payer-specific documentation or prior authorization policies commonly apply.
This publication aims to help billing, clinical, and administrative teams understand the clinical context and payer landscape for CPT code 78265, and to provide a clear starting point for locating payer policies, required documentation, and coding practice considerations relevant to nuclear medicine gastrointestinal motility studies.
Billing Code Overview
CPT code 78265 describes a gastric emptying study performed with an oral radiopharmaceutical or tracer delivered in a liquid, solid, or semisolid meal. The procedure evaluates the rate at which the stomach and the small intestine empty by capturing serial images and monitoring the passage of the radiolabeled meal to assess gastric motor function and transit.
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Service type: Nuclear medicine gastrointestinal motility study
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Typical site of service: Outpatient imaging centers, hospital radiology/nuclear medicine departments, or specialized gastroenterology diagnostic suites
Clinical & Coding Specifications
Clinical Context
A 45-year-old patient presents with chronic postprandial fullness, nausea, early satiety, intermittent vomiting, and unintentional weight loss over several months. History includes long-standing type 1 diabetes mellitus with autonomic neuropathy. After an outpatient gastroenterology evaluation and exclusion of obstructive pathology by upper endoscopy, the gastroenterologist orders a gastric emptying scintigraphy to quantify gastric motility and gastric emptying rates.
On the day of service the nuclear medicine technologist instructs the patient regarding withholding prokinetic and narcotic medications per local protocol and ensures patient fasting. The patient ingests a standardized radiolabeled solid meal (or liquid/semisolid variant if clinically indicated) containing the tracer. Serial planar scintigraphic images are acquired at specified intervals (commonly baseline, 1, 2, and 4 hours for solid meals) to evaluate the percentage of meal retained over time. The interpreting nuclear medicine physician reviews images, generates quantitative retention values, and issues a report documenting delayed, normal, or rapid gastric emptying, which informs the treating gastroenterologist’s management plan.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the interpreting physician’s professional component separate from the technical component. |