ICD-10 Code J45.990 – Exercise induced bronchospasm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J45.990 – Exercise induced bronchospasm
What it is
Use this code for bronchospasm that occurs with exercise. It describes airway narrowing triggered by physical activity, usually in a person with asthma or exercise-related airway hyperreactivity.
Clinical signs
Typical features include cough, wheeze, chest tightness, and shortness of breath during or after exertion. Clinical features vary; refer to documentation.
When to use this code
Assign J45.990 when the record clearly documents exercise-induced bronchospasm or exercise-induced bronchoconstriction. Use it when the provider identifies exertion as the trigger and documents the condition as the reason for the encounter. Check documentation if asthma is also noted, because the record should support the specific diagnosis being coded.
Do not use for
Do not use this code for nonspecific dyspnea, cough, or wheezing without a documented exercise trigger. Do not use it when the chart supports a different asthma subtype or another respiratory cause.
Coding tip
Code only when the provider explicitly links symptoms to exercise; otherwise, query or rely on documented asthma details.