Summary & Overview
CPT 82705: Quantitative Stool Fat Analysis
CPT code 82705 identifies a quantitative laboratory analysis of stool to determine the relative amount of fat in a fecal sample. This test is clinically important for diagnosing malabsorption and maldigestion syndromes and for evaluating suspected celiac disease. As a laboratory diagnostic procedure, it informs dietary management, further diagnostic testing, and specialist referral decisions.
Key national payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage policies and medical necessity criteria for stool fat testing vary across payers; some require documented symptoms or prior testing before approving reimbursement.
Readers will find a concise overview of clinical context and typical sites of service, plus guidance on what to expect in payer coverage discussions. The publication also summarizes common billing considerations, relevant modifiers, and areas where policy updates or local coverage determinations may affect claims processing. Data not available in the input prevents presentation of payer-specific reimbursement benchmarks or utilization trends.
Billing Code Overview
CPT code 82705 describes a laboratory analysis that measures the relative amount of fat in a stool specimen. The test is used to assess for fat malabsorption or maldigestion, and it can support evaluation for conditions such as celiac disease that produce abnormally high fecal fat.
Service type: Laboratory diagnostic test — quantitative fecal fat analysis
Typical site of service: Clinical laboratory or hospital laboratory, with specimen collection performed in an outpatient clinic or at home and delivered to the lab for analysis.
Clinical & Coding Specifications
Clinical Context
A 34-year-old patient presents to a gastroenterology clinic with a 3-month history of chronic watery, bulky, foul-smelling stools and unintentional weight loss. The gastroenterologist suspects fat malabsorption related to pancreatic insufficiency, celiac disease, or small-bowel disease. The clinician orders a quantitative fecal fat analysis. The patient collects a 72-hour stool specimen at home following a prescribed high-fat diet and returns the specimen to the clinical laboratory. In the laboratory workflow, a medical technologist or laboratory analyst performs extraction and gravimetric or biochemical analysis to determine the relative amount of fat in the fecal sample. Results are reported to the ordering provider to confirm malabsorption, guide additional testing (for example, pancreatic function tests or serologic testing for celiac disease), and inform treatment decisions such as pancreatic enzyme replacement or dietary modification.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the professional interpretation component and the laboratory separates technical and professional components. |
27 | Multiple outpatient hospital E/Ms by same physician on same day |