Is B45 a billable ICD-10-CM code?

No. B45 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B45 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).

B45

B45 — Cryptococcosis

Non-billable headerICD-10-CM

B45 is a non-billable header ICD-10-CM code for cryptococcosis. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with B45

These codes carry an Excludes1 note pointing at B45. 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 alone.

M90Osteopathies in diseases classified elsewhere
G02Meningitis in other infectious and parasitic diseases classified elsewhere

Risk adjustment

B45 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 B45

7 child codes. Green means billable.

Questions about B45

Is B45 a billable ICD-10-CM code?: No. B45 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B45 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).