ICD-10-CM > J00-J99 > J40-J4A > J45 > J45.9 > J45.90 J45.90 Unspecified asthma Non-Billable/Non-Specific Applicable To Asthmatic bronchitis NOSChildhood asthma NOSLate onset asthma Codes J45.901Unspecified asthma with (acute) exacerbationJ45.902Unspecified asthma with status asthmaticusJ45.909Unspecified asthma, uncomplicated