ICD-10-CM > J00-J99 > J40-J4A > J45 > J45.5 J45.5 Severe persistent asthma Non-Billable/Non-Specific Codes J45.50Severe persistent asthma, uncomplicatedJ45.51Severe persistent asthma with (acute) exacerbationJ45.52Severe persistent asthma with status asthmaticus