94375 Respiratory flow volume loop
Also known as: flow-volume loop, FVL, flow volume testing
Spirometry with measurement of airflow during inspiration and expiration using flow-volume loop graphing to assess breathing patterns.
In Plain Language
detailed breathing pattern test; flow measurement test
Clinical Context
Used to identify upper airway obstruction, variable obstruction patterns, or unusual flow characteristics not apparent on standard spirometry.
RVU Breakdown
| Work RVU | 0.30 |
| Total RVU | 0.30 |
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 0.30, this code ranks in the 19th percentile among Medicine codes — 2.6x below the median (0.78). The highest wRVU in this category is 23.92.
Specialties
Frequently Asked Questions
What is CPT code 94375?
CPT 94375 (Respiratory flow volume loop) is a Medicine code. Spirometry with measurement of airflow during inspiration and expiration using flow-volume loop graphing to assess breathing patterns.
Who uses CPT code 94375?
CPT 94375 is used by Pulmonology, Internal Medicine, Sleep Medicine. Used to identify upper airway obstruction, variable obstruction patterns, or unusual flow characteristics not apparent on standard spirometry.
When is CPT 94375 used?
Used to identify upper airway obstruction, variable obstruction patterns, or unusual flow characteristics not apparent on standard spirometry.
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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.