ICD-10 Code J45.30 – Mild persistent asthma, uncomplicated (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J45.30 – Mild persistent asthma, uncomplicated
What it is
J45.30 identifies mild persistent asthma without documented complications. Use it when the record shows ongoing asthma that is not fully intermittent, but no complication or exacerbation is specified.
Clinical signs
Typical findings include recurring wheeze, cough, chest tightness, or shortness of breath. Clinical features vary; refer to documentation for the pattern and severity of asthma symptoms.
When to use this code
Use this code when the provider documents mild persistent asthma and does not mention an acute exacerbation, status asthmaticus, or another complication. It also fits when asthma severity is stated clearly and uncomplicated asthma is the diagnosis.
If the note only says asthma, check documentation for severity before assigning J45.30. Code the documented type and severity, not a presumed level based on medication use alone.
Do not use for
Do not use J45.30 for asthma with acute exacerbation, status asthmaticus, or a more specific asthma subtype. Check documentation if the record describes complications or a different severity level.
Coding tip
Verify that “mild persistent” and “uncomplicated” are both supported in the record before assigning J45.30.