J45 — Asthma
J45 is a non-billable header ICD-10-CM code for asthma. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
Use additional code
Add a secondary code to capture the detail described below.
Includes
Conditions this code covers.
- allergic (predominantly) asthma
- allergic bronchitis NOS
- allergic rhinitis with asthma
- atopic asthma
- extrinsic allergic asthma
- hay fever with asthma
- idiosyncratic asthma
- intrinsic nonallergic asthma
- nonallergic asthma
Other codes that can never be billed with J45
These codes carry an Excludes1 note pointing at J45. 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 alone.
Risk adjustment
J45 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.
Code to one of these instead J45
5 child codes. Green means billable.
Questions about J45
- Is J45 a billable ICD-10-CM code?
- No. J45 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does J45 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).
- What cannot be coded together with J45?
- J45 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.