J45: Asthma
Codes under J45 (Asthma). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| J45.2 | Mild intermittent asthma | — |
| J45.2 | Mild intermittent asthma | — |
| J45.3 | Mild persistent asthma | — |
| J45.3 | Mild persistent asthma | — |
| J45.4 | Moderate persistent asthma | — |
| J45.4 | Moderate persistent asthma | — |
| J45.5 | Severe persistent asthma | — |
| J45.5 | Severe persistent asthma | — |
| J45.9 | Other and unspecified asthma | — |
| J45.9 | Other and unspecified asthma | — |
| J45.20 | Mild intermittent asthma, uncomplicated | ✓ |
| J45.20 | Mild intermittent asthma, uncomplicated | ✓ |
| J45.21 | Mild intermittent asthma with (acute) exacerbation | ✓ |
| J45.21 | Mild intermittent asthma with (acute) exacerbation | ✓ |
| J45.22 | Mild intermittent asthma with status asthmaticus | ✓ |
| J45.22 | Mild intermittent asthma with status asthmaticus | ✓ |
| J45.30 | Mild persistent asthma, uncomplicated | ✓ |
| J45.30 | Mild persistent asthma, uncomplicated | ✓ |
| J45.31 | Mild persistent asthma with (acute) exacerbation | ✓ |
| J45.31 | Mild persistent asthma with (acute) exacerbation | ✓ |
| J45.32 | Mild persistent asthma with status asthmaticus | ✓ |
| J45.32 | Mild persistent asthma with status asthmaticus | ✓ |
| J45.40 | Moderate persistent asthma, uncomplicated | ✓ |
| J45.40 | Moderate persistent asthma, uncomplicated | ✓ |
| J45.41 | Moderate persistent asthma with (acute) exacerbation | ✓ |
| J45.41 | Moderate persistent asthma with (acute) exacerbation | ✓ |
| J45.42 | Moderate persistent asthma with status asthmaticus | ✓ |
| J45.42 | Moderate persistent asthma with status asthmaticus | ✓ |
| J45.50 | Severe persistent asthma, uncomplicated | ✓ |
| J45.50 | Severe persistent asthma, uncomplicated | ✓ |
| J45.51 | Severe persistent asthma with (acute) exacerbation | ✓ |
| J45.51 | Severe persistent asthma with (acute) exacerbation | ✓ |
| J45.52 | Severe persistent asthma with status asthmaticus | ✓ |
| J45.52 | Severe persistent asthma with status asthmaticus | ✓ |
| J45.90 | Unspecified asthma | — |
| J45.90 | Unspecified asthma | — |
| J45.99 | Other asthma | — |
| J45.99 | Other asthma | — |
| J45.901 | Unspecified asthma with (acute) exacerbation | ✓ |
| J45.901 | Unspecified asthma with (acute) exacerbation | ✓ |
| J45.902 | Unspecified asthma with status asthmaticus | ✓ |
| J45.902 | Unspecified asthma with status asthmaticus | ✓ |
| J45.909 | Unspecified asthma, uncomplicated | ✓ |
| J45.909 | Unspecified asthma, uncomplicated | ✓ |
| J45.990 | Exercise induced bronchospasm | ✓ |
| J45.990 | Exercise induced bronchospasm | ✓ |
| J45.991 | Cough variant asthma | ✓ |
| J45.991 | Cough variant asthma | ✓ |
| J45.998 | Other asthma | ✓ |
| J45.998 | Other asthma | ✓ |
Frequently asked questions
What is ICD-10-CM code J45?
J45 is an ICD-10-CM category covering Asthma. It contains 50 more specific diagnosis codes, 36 of which are billable.
Is J45 a billable code?
No — J45 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example J45.2 — Mild intermittent asthma). 36 of the 50 codes under J45 are billable.
What codes fall under J45?
J45 includes J45.2, J45.2, J45.3, J45.3, J45.4, plus 45 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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