B51Header code — not billable

Plasmodium vivax malaria

Chapter
1. Certain infectious and parasitic diseases
Category
B51
Effective date
October 1, 2026

Related codes in category B51

B51.0Plasmodium vivax malaria with rupture of spleenYesB51.8Plasmodium vivax malaria with other complicationsYesB51.9Plasmodium vivax malaria without complicationYes

Frequently asked questions

What is ICD-10 code B51?

B51 is an ICD-10-CM diagnosis code for Plasmodium vivax malaria.

Is B51 a billable code?

No. B51 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is B51 in?

B51 falls under Chapter 1: Certain infectious and parasitic diseases.

When did B51 become effective?

B51 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to B51?

B51 belongs to category B51, which includes 3 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.