Summary & Overview
CPT 94070: Bronchial Provocation Test with Spirometry
CPT code 94070 designates a bronchial provocation test with serial spirometry, a diagnostic procedure that intentionally induces bronchospasm to measure airway hyperresponsiveness. This test is important nationally for diagnosing and characterizing asthma and other reactive airway disorders when baseline spirometry is inconclusive. It informs treatment decisions, severity assessment, and eligibility for certain therapies.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for use of CPT code 94070, common settings where the procedure is performed, and the implications for billing and payer engagement. The publication outlines typical benchmarks, relevant policy considerations affecting coverage and prior authorization, and operational factors practices should consider when ordering or performing bronchial provocation testing. Where specific payer policies vary, summaries of typical coverage approaches are provided. Data not available in the input where applicable will be noted.
Billing Code Overview
CPT code 94070 describes a bronchial provocation test with spirometry, in which the provider deliberately induces bronchospasm by controlled, measurable exposure to a specific stimulant and performs repeated spirometry to assess lung function under provoked conditions.
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Service type: Diagnostic pulmonary function testing with bronchial challenge
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Typical site of service: Pulmonary function laboratory or outpatient clinic setting where controlled bronchial provocation and serial spirometry can be performed safely
Clinical & Coding Specifications
Clinical Context
A 28-year-old patient with a history of intermittent wheeze and suspected asthma presents to a pulmonary function laboratory for bronchoprovocation testing. The patient reports exertional dyspnea and variable cough with normal baseline spirometry but clinical suspicion for airway hyperresponsiveness. Prior to testing, the pulmonary technician confirms medication holds (short-acting bronchodilators withheld per protocol), obtains informed consent, and documents baseline vitals and baseline spirometry. Under direct supervision of a pulmonologist (or qualified physician), the provider administers incremental controlled inhaled doses of a bronchoconstricting agent (commonly methacholine or histamine) or performs exercise-induced challenge, with spirometry performed at baseline and after each dose to measure falls in FEV1 and other flow volumes. The provider monitors for adverse responses, documents the provocative concentration or dose producing a 20% fall in FEV1 (PC20) when applicable, and performs bronchodilator reversal testing if indicated. Typical site of service is a hospital outpatient pulmonary function laboratory or an ambulatory specialty clinic with resuscitation capability. The procedure is commonly ordered when diagnosis is unclear after baseline testing, for evaluation of occupational exposure-related symptoms, or when confirming suspected asthma in athletes or patients with normal resting spirometry.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation and professional work for the bronchoprovocation test separate from technical services |