B59 – Pneumocystosis

ICD-10-CM 2027 diagnosis code · Protozoal diseases

Billable code

ICD-10-CM code B59
Code
B59 (claims format: B59)
Description
Pneumocystosis
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
1. Certain infectious and parasitic diseases (A00-B99)
Block
B50-B64 Protozoal diseases

Notes for B59

Applicable to:
  • Pneumonia due to Pneumocystis carinii
  • Pneumonia due to Pneumocystis jirovecii

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block B50-B64

Excludes1 (not coded here):
  • amebiasis (A06.-)
  • other protozoal intestinal diseases (A07.-)

Index terms for B59

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code B59?

B59 is the ICD-10-CM code for pneumocystosis, in the block B50-B64 (Protozoal diseases).

Is B59 a billable code?

Yes. B59 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

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.