ICD-10-CM 2027
ICD-10 code for cough variant asthma
From the official ICD-10-CM alphabetic index entry “Asthma, asthmatic (bronchial) (catarrh) (spasmodic) › cough variant”. Page updated September 29, 2026.
About coding cough variant asthma
The ICD-10-CM code for cough variant asthma is J45.991 (Cough variant asthma).
Within J45.99 (other asthma), J45.991 is specifically for cough variant asthma. Related codes cover exercise induced bronchospasm (J45.990) and other asthma (J45.998).
Use an additional code to identify: eosinophilic asthma (J82.83), exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about cough variant asthma ICD-10 codes
What is the ICD-10 code for cough variant asthma?
- J45.991 — Cough variant asthma.
Is J45.991 billable?
- Yes. J45.991 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J45.991 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J45.991 as a principal diagnosis.
Is J45.991 a CC or MCC?
- No. J45.991 is neither a CC nor an MCC under MS-DRG v44.0.