J45.909
Unspecified asthma, uncomplicated
J45.909 is a billable ICD-10-CM code used to specify a diagnosis of unspecified asthma that is uncomplicated. This code is applied when a patient has a documented diagnosis of asthma, but the clinical documentation does not specify the severity (such as mild intermittent, mild persistent, moderate persistent, or severe persistent) and there is no mention of an acute exacerbation or status asthmaticus. It typically represents a stable, baseline state of the condition. While it is a valid code, clinical best practices encourage providers to document the specific severity and control level of the asthma to ensure the highest level of coding specificity and appropriate patient care management.
Clinical Symptoms
- Wheezing
- Shortness of breath
- Chest tightness
- Chronic cough, especially at night or early morning
Common Causes
- Environmental allergens (pollen, dust mites, pet dander)
- Respiratory tract infections
- Physical exertion or exercise
- Exposure to cold air or sudden temperature changes
Documentation & Coding Tips
Whenever possible, query the provider to document the specific severity (intermittent vs. persistent) and whether the asthma is currently exacerbated to avoid using unspecified codes.
Example: Patient presents for a routine medication refill. Assessment: Asthma, currently stable and uncomplicated. (Note: If severity was known, a more specific code would be used).