CPT 82009: Qualitative Ketone Bodies Test
CPT code 82009 designates a qualitative laboratory test for ketone bodies, used to detect ketonemia or ketonuria in clinical settings. Nationally, ketone testing is a routine diagnostic tool for monitoring people with diabetes at risk for diabetic ketoacidosis, assessing dehydration, and evaluating patients on high-fat or ketogenic diets. The test is performed across clinical laboratories, hospital labs, outpatient clinics, and point-of-care locations, making it relevant to a broad range of care settings and payer policies.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the clinical context for ketone testing, common sites of service, and typical use cases. The publication summarizes payer coverage patterns and benchmarking where available, highlights coding and billing considerations tied to CPT code 82009, and outlines operational implications for laboratories and clinicians. It also points to areas where policy updates or payer-specific edits commonly affect claims processing. Data not available in the input is noted where applicable.
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Billing Code Overview
CPT code 82009 describes a qualitative test for ketone bodies. This test identifies the presence of ketone compounds in blood or urine to detect ketosis or ketoacidosis.
Service type: Clinical laboratory testing — qualitative ketone body assay
Typical site of service: Clinical laboratory, hospital laboratory, outpatient clinic, or point-of-care settings
This test is commonly ordered for patients with diabetes to detect diabetic ketoacidosis, for patients who are dehydrated, and for individuals on metabolic or ketogenic diets where the body is using fat as the primary energy source.