Summary & Overview
CPT 94452: Hypoxic Oximetry with Provider Interpretation
CPT code 94452 captures a diagnostic oximetry procedure in which a patient breathes a low-oxygen mixture while the provider monitors oxyhemoglobin saturation, interprets the findings, and issues a report. Nationally, this service is used to evaluate impairments in gas exchange, assess readiness for certain therapies or procedures, and identify disorders of ventilatory control. It is relevant in pulmonary medicine, sleep medicine, preoperative risk assessment, and evaluation of unexplained hypoxemia.
Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical intent and typical settings for the service, a summary of common billing modifiers and practice considerations, and an outline of what is commonly included in interpretation and reporting. The report highlights national implications for utilization and programmatic coverage considerations without state-specific detail.
The publication provides operational context for clinicians and billing staff, clarifies the procedure’s clinical purpose, and identifies where additional documentation and reporting are typically required. Data not available in the input is clearly noted where relevant, including specific payer coverage policies, fee benchmarks, and associated ICD-10 diagnoses.
Billing Code Overview
CPT code 94452 describes a diagnostic procedure in which the patient breathes a low-oxygen mixture while the provider monitors oxyhemoglobin saturations, interprets the results, and creates a report. This service assesses a patient’s oxygenation response to reduced inspired oxygen and helps evaluate conditions that affect gas exchange and ventilatory control.
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Service type: Diagnostic oximetry testing with hypoxic challenge/low-oxygen exposure and interpretation/reporting
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Typical site of service: Hospital outpatient department, dedicated pulmonary function or respiratory therapy lab, or other monitored clinical setting where continuous pulse oximetry and provider observation are available
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred to a pulmonary function laboratory or hospital-based respiratory testing area for evaluation of suspected or unexplained hypoxemia or for preoperative assessment of gas exchange reserve. The patient is seated or supine and breathes a controlled low-oxygen gas mixture while continuous pulse oximetry (oxyhemoglobin saturation) is recorded. A credentialed provider (pulmonologist, anesthesiologist, or respiratory therapist under physician supervision) monitors the patient, documents oxygen saturation responses, interprets desaturation patterns, and generates a written report with recommendations about the need for ambulatory oxygen, supplemental oxygen titration, or further diagnostic testing. Typical indications include evaluation of exertional or resting dyspnea, unexplained low resting pulse oximetry, assessment of pulmonary fibrosis, COPD, or evaluation for supplemental oxygen qualification. The test is commonly performed in an outpatient pulmonary clinic, ambulatory testing center, or inpatient respiratory diagnostics unit. The clinical workflow includes patient consent and screening, baseline vital signs and oxygen saturation recording, administration of the low-oxygen gas mixture for the prescribed interval, continuous saturation monitoring, capture of nadir and trend data, provider interpretation, and documentation of results and conclusions in the medical record.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation/report portion, with technical component billed separately. |