B51
Plasmodium vivax malaria
B51 is a non-billable ICD-10-CM code category for plasmodium vivax malaria. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are B51.0 Plasmodium vivax malaria with rupture of spleen, B51.8 Plasmodium vivax malaria with other complications and B51.9 Plasmodium vivax malaria without complication. Its coding notes include a Use additional code instruction, 3 Excludes1 entries and 5 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- plasmodium vivax with Plasmodium falciparum (B50.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (5 notes)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- 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)
Includes
Further defines or gives examples of the content of the category.
- mixed infections of Plasmodium vivax with other Plasmodium species, except Plasmodium falciparum
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible