B45.9 — Cryptococcosis, unspecified
B45.9 is a billable, specific ICD-10-CM code for cryptococcosis, unspecified. It is valid for submission on a claim.
Risk adjustment
B45.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 6 Opportunistic Infections0.381 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
B45.9 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
- A56612Billing and Coding: CT of the Head
- A57672Billing and Coding: Nail Debridement
How B45.9 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 B45.9.
- Cryptococcosis, cryptococcus(infection) (neoformans)
Related codes at this level
Codes that share B45. If B45.9 is not quite right, the correct code is usually one of these.
Questions about B45.9
- Is B45.9 a billable ICD-10-CM code?
- Yes. B45.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B45.9 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).