J45.9 — Other and unspecified asthma
J45.9 is a non-billable header ICD-10-CM code for other and unspecified asthma. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with J45.9
These codes carry an Excludes1 note pointing at J45.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading J45.9 alone.
Risk adjustment
J45.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How J45.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to J45.9.
- Bronchitis›asthmatic
Code to one of these instead J45.9
2 child codes. Green means billable.
Related codes at this level
Codes that share J45. If J45.9 is not quite right, the correct code is usually one of these.
Questions about J45.9
- Is J45.9 a billable ICD-10-CM code?
- No. J45.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does J45.9 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).