J45.51
Billable codeSevere persistent asthma with (acute) exacerbation
The ICD-10 code for severe persistent asthma with (acute) exacerbation is J45.51.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- J45.50Severe persistent asthma, uncomplicated
- J45.52Severe persistent asthma with status asthmaticus
- J45.51Severe persistent asthma with (acute) exacerbation
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 49302Approximate match
- 49312Approximate match
Associated MS-DRGs
J45.51 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.