J45.21
J45.21: Mild intermittent asthma with (acute) exacerbation
Billable / specific codeICD-10-CM
J45.21 is a billable, specific ICD-10-CM code for mild intermittent asthma with (acute) exacerbation. It is valid for submission on a claim.
Check J45.21 with the rest of the claim: free scrubberExcludes1 inherited from the categories above J45.21
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above J45.21
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with J45.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
J45.21 is named in 35 Medicare coverage policies: 33 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.
- A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A52466Nebulizers - Policy Article
- A53057Billing and Coding: Home Health Occupational Therapy
Alphabetic index entries that lead here
- Asthma, asthmatic›intermittent›with›exacerbation(acute)
- Asthma, asthmatic›mild intermittent›with›exacerbation(acute)
Code history
Unchanged in every release from FY2024 to FY2027.