B59 ICD-10-CM Code: Pneumocystosis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
B59Pneumocystosis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where B59 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Protozoal diseases (B50-B64)
- 3
Category B59
Pneumocystosis
- 4
Code B59
Pneumocystosis
Documentation details
Notes for this code
Inclusion terms
- Pneumonia due to Pneumocystis carinii
- Pneumonia due to Pneumocystis jirovecii
Code first
No “code first” instruction is listed for B59.
Use additional code
No “use additional code” instruction is listed for B59.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for B59.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B59.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code B59 mean?
B59 is the FY 2027 U.S. ICD-10-CM code for “Pneumocystosis.”
Is B59 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, B59 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is B59 located in ICD-10-CM?
B59 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Protozoal diseases (B50-B64) (B50–B64), under category B59, Pneumocystosis.
What coding notes are listed for B59?
Its listed inclusion terms are Pneumonia due to Pneumocystis carinii; Pneumonia due to Pneumocystis jirovecii. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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