J45.909 — Unspecified asthma, uncomplicated
J45.909 is a billable, specific ICD-10-CM code for unspecified asthma, uncomplicated. It is valid for submission on a claim.
Other codes that can never be billed with J45.909
These codes carry an Excludes1 note pointing at J45.909. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading J45.909 alone.
Risk adjustment
J45.909 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.
Medicare coverage
J45.909 is named in 42 Medicare coverage policies — 40 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
How J45.909 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 J45.909.
- Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
- IgE asthma
- Asthma, asthmatic›allergic extrinsic
- Asthma, asthmatic›childhood
- Asthma, asthmatic›late-onset
- Asthma, asthmatic›mixed
- Asthma, asthmatic›nonallergic(intrinsic)
- Asthma, asthmatic›predominantly allergic
- Bronchitis›allergic(acute)
- Dyspnea›asthmatic(bronchial)
- Fever›hay›with asthma(bronchial)
- Rhinitis›allergic›with asthma
Related codes at this level
Codes that share J45.90. If J45.909 is not quite right, the correct code is usually one of these.
Questions about J45.909
- Is J45.909 a billable ICD-10-CM code?
- Yes. J45.909 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J45.909 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).