Pneumocystosis (B59) ICD-10-CM
The B59 code range covers pneumocystosis with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Pneumonia due to Pneumocystis carinii
- Pneumonia due to Pneumocystis jirovecii
Codes in the B59 Range 1 codes · 1 billable
- B59 Pneumocystosis
About the B59 Code Range
ICD-10 code B59 is specifically used to identify pneumocystosis, a fungal infection primarily affecting the lungs. This code captures infections caused by the organism Pneumocystis jirovecii, including Pneumocystis pneumonia and related complications.
PneumocystosisB59 to document these fungal infections among pneumonia cases that are not related to tuberculosis, ensuring accurate classification and appropriate treatment planning. Understanding these synonyms and their relation to B59 supports precise coding when encountering terms like Pneumocystis jirovecii lung cyst or colonization of the respiratory tract with Pneumocystis jirovecii.
Questions About This Page
How many billable codes are in the B59 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B59 range classify?
The range classifies pneumocystosis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
