94690 O2 uptk rest indirect
Also known as: resting metabolic rate test, indirect calorimetry, resting VO2
Indirect calorimetry for measurement of oxygen uptake at rest to assess resting metabolic rate without exercise.
In Plain Language
resting calorie burning measurement; at-rest breathing efficiency test
Clinical Context
Used to determine resting energy expenditure for nutritional assessment and planning in critically ill and metabolically abnormal patients.
RVU Breakdown
| Work RVU | 0.07 |
| Total RVU | 0.07 |
Est. Medicare Payment
National estimate based on 2026 CMS PFS Conversion Factor ($33.40). Actual payment varies by locality (GPCI adjustment).
Billing & Documentation
Medicine section codes cover a wide range of non-surgical services. Documentation should include the clinical indication, procedure details, interpretation (if applicable), and any patient-specific findings.
How This Code Compares
With a work RVU of 0.07, this code ranks in the 3rd percentile among Medicine codes — 11.1x below the median (0.78). The highest wRVU in this category is 23.92.
Specialties
Frequently Asked Questions
What is CPT code 94690?
CPT 94690 (O2 uptk rest indirect) is a Medicine code. Indirect calorimetry for measurement of oxygen uptake at rest to assess resting metabolic rate without exercise.
Who uses CPT code 94690?
CPT 94690 is used by Nutrition, Internal Medicine, Critical Care. Used to determine resting energy expenditure for nutritional assessment and planning in critically ill and metabolically abnormal patients.
When is CPT 94690 used?
Used to determine resting energy expenditure for nutritional assessment and planning in critically ill and metabolically abnormal patients.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.