B51 ICD-10-CA category: Plasmodium vivax malaria
B51 isn’t a code on its own. Choose one of the 3 codes beneath it, the one the documentation supports.
Official description
B51Plasmodium vivax malaria
ICD-10-CA · Canada
Codes in B51
B51 isn’t a code on its own. Open the code that matches what the note documents.
Notes for B51
As CIHI prints them, with any note B51 takes from the headings above it.
Includes
- Mixed infections of Plasmodium vivax with other Plasmodium species, except Plasmodium falciparum
- Diseases generally recognized as communicable or transmissibleFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Use additional code
Add a code for this detail when the note documents it.
- Use additional code (U82-U84) to identify resistance to antimicrobial drugsFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Excludes
Conditions classified elsewhere.
- When mixed with Plasmodium falciparum (B50.-)
- Amoebiasis (A06.-)other protozoal intestinal diseases (A07.-)From B50-B64 Protozoal diseases
- Carrier or suspected carrier of infectious disease (Z22.-)certain localized infections - see body system-related chaptersinfectious and parasitic diseases:• complicating pregnancy, childbirth and the puerperium [except obstetrical tetanus] (O98.-)• specific to the perinatal period [except tetanus neonatorum, whooping cough, congenital syphilis, perinatal gonococcal infection and perinatal human immunodeficiency virus [HIV] disease] (P35-P39)influenza and other acute respiratory infections (J00-J22)From Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Where B51 sits
- 1ChapterChapter 1: Certain infectious and parasitic diseases (A00-B99)
- 2Block B50-B64Protozoal diseases
- 3Category B51Plasmodium vivax malaria
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is B51 a valid ICD-10-CA code?
No. B51 (Plasmodium vivax malaria) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 3 codes; record the one the documentation supports.
Where is B51 in ICD-10-CA?
B51 sits under B50-B64 Protozoal diseases, within Chapter 1: Certain infectious and parasitic diseases (A00-B99).
What coding notes apply to B51?
ICD-10-CA lists Includes, Excludes, Use additional code notes for B51, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.