Is ICD-10-CM code B51 billable?

No, B51 (Plasmodium vivax malaria) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code B51 belong to?

B51 belongs to Chapter 1 of the ICD-10-CM tabular list: A00–B99 (Certain Infectious and Parasitic Diseases).

B51

Non-Billable

ChapterA00–B99

Rankcategory

Description

Plasmodium vivax malaria

About ICD-10-CM code B51

B51 is the ICD-10-CM diagnosis code for Plasmodium vivax malaria. It sits in A00-B99 Certain Infectious and Parasitic Diseases, within Protozoal diseases (B50-B64). B51 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (3 billable)

B51.0Plasmodium vivax malaria with rupture of spleen B51.8Plasmodium vivax malaria with other complications B51.9Plasmodium vivax malaria without complication

Metadata & Insights

•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. Use a different code.)

certain localized infections - see body system-related chapters

Excludes2(Not included here. Code separately if applicable.)

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.-)

B50-B64 Parent Instructions

Excludes1(Not coded here. Use a different code.)

amebiasis (A06.-)
other protozoal intestinal diseases (A07.-)

Instructional Notes

Includes

mixed infections of Plasmodium vivax with other Plasmodium species, except Plasmodium falciparum

Excludes1(Not coded here. Use a different code.)

plasmodium vivax with Plasmodium falciparum (B50.-)

Clinical Hierarchy

BillableHas subcodes

CH1Certain infectious and parasitic diseases (A00-B99)

B50-B64Protozoal diseases (B50-B64)

B51Plasmodium vivax malariaNot billable

B51.0Plasmodium vivax malaria with rupture of spleenBillable

B51.8Plasmodium vivax malaria with other complicationsBillable

B51.9Plasmodium vivax malaria without complicationBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B51:

blockB50-B64

Protozoal diseases (B50-B64)

View context instructions

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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