Coding Guides

FeNO Monitoring CPT/HCPCS Codes

Here is a sample of the coding reference guide for healthcare providers billing for FeNO monitoring and related services.

CPT/HCPCS Code1 Descriptor 95012 Nitric oxide expired gas determination A4617 Mouthpiece 99201-99205* New patient office visit for the evaluation and management 99211-99215* Established patient office visit for the evaluation and management *Use of these codes requires the appropriate use of modifiers. If an E&M code is reported with CPT 95012, the 25 modifier must be appended.

FeNO and Asthma Coding Guides

For full FeNO or asthma ICD-10 coding reference guides, please download the PDFs below.

FeNO CPT Coding Reference Guide

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ICD-10-CM Asthma Diagnosis Coding

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