ICD-10 Code J45.20 – Mild intermittent asthma, uncomplicated (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J45.20 – Mild intermittent asthma, uncomplicated
What it is
J45.20 identifies asthma that is mild and intermittent, without documented complications. Use it when the record shows asthma with infrequent symptoms and no evidence of severe or persistent disease.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include episodic wheeze, cough, chest tightness, or shortness of breath that comes and goes, with symptom-free periods between episodes.
When to use this code
Use this code when the provider documents mild intermittent asthma and does not describe a complication, exacerbation, or status asthmaticus. It is appropriate for routine encounters, follow-up visits, or problem list entries when the condition remains uncomplicated.
If the note only says “asthma” or gives inconsistent severity details, check documentation before assigning J45.20. You should code the documented severity and type, not assume it from medication use alone.
Do not use for
Do not use J45.20 for asthma with exacerbation, status asthmaticus, or any documented complication. Check documentation if the provider specifies persistent asthma or a different asthma subtype.
Coding tip
Match the code to the exact asthma severity and clinical status stated by the provider.