CPT code 83987 denotes a laboratory assay that measures the pH of condensed, exhaled breath. This specialized test quantifies acidity or alkalinity in exhaled breath condensate and can provide noninvasive information about airway environment and inflammation. As a targeted pulmonary laboratory measure, it is relevant for clinicians and laboratories involved in respiratory diagnostics and research.

Key payers in national coverage considerations include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find practical context on the clinical purpose of the test, likely sites of service, and typical laboratory workflow for sample collection and analysis. The publication outlines common billing considerations, payer coverage landscape, and coding relationships that influence claim submission and adjudication. It also provides benchmarks and policy updates where available, and highlights clinical situations in which measurement of exhaled breath pH may be used as part of patient evaluation.

Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, and related CPT or ancillary codes is noted elsewhere in the full document.