ICD-10 Code J45.909: Unspecified asthma, uncomplicated
Diseases of the respiratory system
ICD-10 code J45.909 identifies unspecified asthma without exacerbation or status asthmaticus.
Coding guidance
The J45 category classifies asthma by severity: mild intermittent, mild persistent, moderate persistent and severe persistent.
J45.909 is the unspecified default and should be replaced with a severity-specific code whenever documentation supports it.
Separate codes indicate whether the encounter involves acute exacerbation or status asthmaticus.
Documentation and specificity notes
- Document asthma severity classification to support a more specific code.
- Specify whether exacerbation or status asthmaticus is present at the encounter.
- Frequent unspecified coding reduces risk-adjustment accuracy in value-based contracts.
Related codes
This page provides a general summary for educational purposes and is not a substitute for the official ICD-10-CM code set, the ICD-10-CM Official Guidelines for Coding and Reporting, or payer policy. Code sets are updated annually, verify against the current official release before billing.
FAQ
ICD-10 J45.909, frequently asked questions questions
- What is ICD-10 code J45.909?
- ICD-10 code J45.909 identifies unspecified asthma without exacerbation or status asthmaticus.
- Is J45.909 a billable ICD-10 code?
- Yes. J45.909 is a billable and specific ICD-10-CM code that may be used to indicate a diagnosis for reimbursement purposes, provided documentation supports it.
- What documentation supports J45.909?
- Document asthma severity classification to support a more specific code. Specify whether exacerbation or status asthmaticus is present at the encounter. Frequent unspecified coding reduces risk-adjustment accuracy in value-based contracts.
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