B45.3 — Osseous cryptococcosis
B45.3 is a billable, specific ICD-10-CM code for osseous cryptococcosis. It is valid for submission on a claim.
Other codes that can never be billed with B45.3
These codes carry an Excludes1 note pointing at B45.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B45.3 alone.
- M90Osteopathies in diseases classified elsewhere
Risk adjustment
B45.3 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
B45.3 is named in 4 Medicare coverage policies — 4 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
- A57206Billing and Coding: Lumbar MRI
- A57224Billing and Coding: Respiratory Care
How B45.3 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 B45.3.
- Cryptococcosis, cryptococcus›bone
- Cryptococcosis, cryptococcus›osseous
Related codes at this level
Codes that share B45. If B45.3 is not quite right, the correct code is usually one of these.
Questions about B45.3
- Is B45.3 a billable ICD-10-CM code?
- Yes. B45.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B45.3 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).