B45 – Cryptococcosis
ICD-10-CM 2027 diagnosis code · Mycoses
ICD-10-CM code
B45
- Code
B45(claims format:B45)- Description
- Cryptococcosis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B35-B49 Mycoses
Billable codes under B45
B45 is a header code and cannot be used on claims. Choose the most specific code:
- B45.0 – Pulmonary cryptococcosisBillable
- B45.1 – Cerebral cryptococcosisBillable
- B45.2 – Cutaneous cryptococcosisBillable
- B45.3 – Osseous cryptococcosisBillable
- B45.7 – Disseminated cryptococcosisBillable
- B45.8 – Other forms of cryptococcosisBillable
- B45.9 – Cryptococcosis, unspecifiedBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block B35-B49
Frequently asked questions
What is ICD-10 code B45?
B45 is the ICD-10-CM code for cryptococcosis, in the block B35-B49 (Mycoses).
Is B45 a billable code?
No. B45 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.