ICD-10-CM Code J45.20
Mild intermittent asthma, uncomplicated
Diagnosis information
Billable
Yes
Valid for claim submission
Chapter
J00–J99
Diseases of the respiratory system
Risk adjustment
None
Not risk-adjustable (V28)
More codes in the J45 category
Other billable ICD-10-CM codes in the same category as J45.20. Coding to the highest specificity the documentation supports is what keeps a claim clean — pick the child code that most precisely matches the diagnosis.
- J45.21Mild intermittent asthma with (acute) exacerbation
- J45.22Mild intermittent asthma with status asthmaticus
- J45.30Mild persistent asthma, uncomplicated
- J45.31Mild persistent asthma with (acute) exacerbation
- J45.32Mild persistent asthma with status asthmaticus
- J45.40Moderate persistent asthma, uncomplicated
- J45.41Moderate persistent asthma with (acute) exacerbation
- J45.42Moderate persistent asthma with status asthmaticus
- J45.50Severe persistent asthma, uncomplicated
- J45.51Severe persistent asthma with (acute) exacerbation
- J45.52Severe persistent asthma with status asthmaticus
- J45.901Unspecified asthma with (acute) exacerbation
Documentation & coding notes
- J45.20 is a billable/specific ICD-10-CM code — it can be reported as a primary or secondary diagnosis when the documentation supports it. Code to the highest level of specificity the record allows.
- Always verify the code against the current ICD-10-CM Official Guidelines and the payer's coverage policy before submitting — coverage, medical necessity edits, and sequencing rules vary by payer.
Related J00–J99 codes
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Medical coding disclaimer
ICD-10-CM codes and descriptions shown are from the CMS FY2026 official code set and HCC mappings from the CMS-HCC V28 model (payment year 2026), shown for educational reference. Official Guidelines, payer coverage, medical-necessity edits, and sequencing rules vary. Always verify with the current ICD-10-CM Official Guidelines and the payer before submitting claims. D3rx is not responsible for coding or billing outcomes.