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CPT 83986: Body Fluid pH Measurement
CPT code 83986 represents the technical laboratory measurement of pH in a body fluid when no other specific code applies. Measuring pH is a fundamental diagnostic parameter across multiple clinical contexts — including metabolic assessment, fluid analysis, and monitoring of therapeutic interventions — making this test relevant in inpatient and outpatient laboratory workflows nationwide. The code documents the technical component of pH testing performed with instruments such as pH meters or blood gas analyzers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of where CPT code 83986 is typically billed, clinical contexts driving test utilization, and common modifiers used to indicate technical versus professional components or special circumstances. The publication summarizes typical sites of service, expected billing practice considerations, and where available, national payer coverage patterns and reimbursement context. Practical information on test purpose and operational settings is provided to help coding, billing, and laboratory operations staff understand when CPT code 83986 is applicable.
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
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Billing Code Overview
CPT code 83986 describes a technical laboratory test measuring the pH (acidity or alkalinity) of a body fluid not otherwise represented by another code. The analytic process may be performed using a pH meter, blood gas analyzer, litmus paper, or similar assay methods.
Service type: Clinical laboratory — quantitative/qualitative chemistry test (pH measurement)
Typical site of service: Clinical laboratory or hospital laboratory; testing may also occur in ambulatory surgery centers, physician office laboratories, or other certified lab settings where body fluid analysis is performed.