Moderate persistent asthma with status asthmaticus

This code signifies a chronic respiratory condition characterized by persistent, moderate airflow obstruction and inflammation, currently experiencing a severe, acute exacerbation that is unresponsive to initial bronchodilator therapy. Status asthmaticus represents a life-threatening asthma attack requiring immediate medical intervention.

Apply this code when documentation clearly indicates a patient with a pre-existing diagnosis of moderate persistent asthma is presenting with an acute, severe asthma exacerbation that meets the criteria for status asthmaticus. This typically involves prolonged, severe symptoms, hypoxemia, and poor response to standard rescue inhalers.

• Ensure documentation explicitly states "moderate persistent asthma" and "status asthmaticus" or provides clinical details that unequivocally support both conditions.
• Do not confuse with acute exacerbations of asthma that are not severe enough to be classified as status asthmaticus (e.g., J45.41).
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.