ICD-10-CM
ICD-10 code for Asthma exacerbation: J45.901
The closest CDC title for "Asthma exacerbation" is J45.901, Unspecified asthma with (acute) exacerbation. J45.901 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under J45, then other CDC titles that name unspecified asthma with (acute) exacerbation
A header groups codes and is not billed. A billable code is one you can report.
- J45AsthmaHeader
- J45.2Mild intermittent asthmaHeader
- J45.20Mild intermittent asthma, uncomplicatedBillable
- J45.21Mild intermittent asthma with (acute) exacerbationBillable
- J45.22Mild intermittent asthma with status asthmaticusBillable
- J45.3Mild persistent asthmaHeader
- J45.30Mild persistent asthma, uncomplicatedBillable
- J45.31Mild persistent asthma with (acute) exacerbationBillable
- J45.32Mild persistent asthma with status asthmaticusBillable
- J45.4Moderate persistent asthmaHeader
- J45.40Moderate persistent asthma, uncomplicatedBillable
- J45.41Moderate persistent asthma with (acute) exacerbationBillable
- J45.42Moderate persistent asthma with status asthmaticusBillable
- J45.5Severe persistent asthmaHeader
- J45.50Severe persistent asthma, uncomplicatedBillable
- J45.51Severe persistent asthma with (acute) exacerbationBillable
- J45.52Severe persistent asthma with status asthmaticusBillable
- J45.9Other and unspecified asthmaHeader
- J45.90Unspecified asthmaHeader
- J45.901Unspecified asthma with (acute) exacerbationBillable
- J45.902Unspecified asthma with status asthmaticusBillable
- J45.909Unspecified asthma, uncomplicatedBillable
- J45.99Other asthmaHeader
- J45.990Exercise induced bronchospasmBillable
- J45.991Cough variant asthmaBillable
- J45.998Other asthmaBillable
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From J45. A note on a category applies to every code under it.
Excludes1
Excludes1 means these codes are not reported together.
From J45. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From J45. A note on a category applies to every code under it.
Related conditions
Related pages
- J45.901 code detailsNotes, nearby codes, CMS-HCC group
- Category J45Every code under it
- Chapter 10Diseases of the respiratory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Asthma exacerbation?
The closest CDC title for "Asthma exacerbation" is J45.901, Unspecified asthma with (acute) exacerbation. J45.901 is a billable code.
Is J45.901 billable?
Yes. J45.901 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to J45.901?
The CDC tabular list gives 4 Excludes1 notes (not coded together), 4 Excludes2 notes (may be coded together when both are documented), 8 "use additional code" notes for J45.901 and the categories above it. They are listed on this page.
What chapter is J45.901 in?
Chapter 10. Diseases of the respiratory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.