94450 Breathing response hypoxia
Also known as: hypoxic ventilatory response, breathing response test, hypoxia challenge
Testing of breathing response to hypoxia (reduced oxygen) to assess ventilatory drive and chemoreceptor function in response to low oxygen levels.
In Plain Language
breathing response to low oxygen test; oxygen sensitivity test
Clinical Context
Used to assess ventilatory control and identify patients with blunted hypoxic response or central sleep apnea-related conditions.
RVU Breakdown
| Work RVU | 0.39 |
| Total RVU | 0.39 |
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 0.39, this code ranks in the 25th percentile among Medicine codes — 2.0x below the median (0.78). The highest wRVU in this category is 23.92.
Specialties
Frequently Asked Questions
What is CPT code 94450?
CPT 94450 (Breathing response hypoxia) is a Medicine code. Testing of breathing response to hypoxia (reduced oxygen) to assess ventilatory drive and chemoreceptor function in response to low oxygen levels.
Who uses CPT code 94450?
CPT 94450 is used by Pulmonology, Sleep Medicine, Neurology. Used to assess ventilatory control and identify patients with blunted hypoxic response or central sleep apnea-related conditions.
When is CPT 94450 used?
Used to assess ventilatory control and identify patients with blunted hypoxic response or central sleep apnea-related conditions.
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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.