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 2027, 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
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B59 range.
Pneumonia, Pneumocystis
A pulmonary disease in humans occurring in immunodeficient or malnourished patients or infants, characterized by DYSPNEA, tachypnea, and HYPOXEMIA. Pneumocystis pneumonia is a frequently seen opportunistic infection in AIDS. It is caused by the fungus PNEUMOCYSTIS JIROVECII. The disease is also found in other MAMMALS where it is caused by related species of Pneumocystis.
About the B59 Code Range
Pneumocystosis is an infection caused by the fungus Pneumocystis jirovecii. It can affect the lungs or occur outside them.
B59 sits within the protozoal diseases block of infectious and parasitic diseases. It has no listed subdivisions separating infection by location.
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, 2026 through September 30, 2027. 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 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
