J45.52 — Severe persistent asthma with status asthmaticus
J45.52 is a billable, specific ICD-10-CM code for severe persistent asthma with status asthmaticus. It is valid for submission on a claim.
Risk adjustment
J45.52 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 279 Severe Persistent Asthma0.818 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
J45.52 is named in 54 Medicare coverage policies — 52 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
- A52448Billing and Coding: Omalizumab and biosimilar, OMLYCLO® (omalizumab-igec)
- A52466Nebulizers - Policy Article
How J45.52 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 J45.52.
- Asthma, asthmatic›severe persistent›with›status asthmaticus
- Asthma, asthmatic›persistent›severe›with›status asthmaticus
Related codes at this level
Codes that share J45.5. If J45.52 is not quite right, the correct code is usually one of these.
Questions about J45.52
- Is J45.52 a billable ICD-10-CM code?
- Yes. J45.52 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J45.52 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).