B50-B64

Non-Billable
ChapterA00–B99
Rankblock
Official Description

Protozoal diseases (B50-B64)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

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

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
B50-B64Protozoal diseases (B50-B64)
B50Plasmodium falciparum malaria
B51Plasmodium vivax malaria
B52Plasmodium malariae malaria
B53Other specified malaria
B54Unspecified malaria
B55Leishmaniasis
B56African trypanosomiasis
B57Chagas' disease
B58Toxoplasmosis
B59Pneumocystosis
B60Other protozoal diseases, not elsewhere classified
B64Unspecified protozoal disease

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B50-B64:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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