Non-Billable / Non-Specific Code
ICD-10-CM B51 is the diagnosis code for Plasmodium vivax malaria. This code falls under the section "Protozoal diseases" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as B51. They are mutually exclusive:
Understanding where B51 sits in the ICD-10-CM classification helps ensure proper coding:
No, B51 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
B51 is the ICD-10-CM diagnosis code for "Plasmodium vivax malaria". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
B51 is located in Section B50-B64 — "Protozoal diseases" within Chapter 1 of the ICD-10-CM Tabular List.
B51 has 3 sub-code(s) that provide more specific detail: B51.0, B51.8, B51.9.
Use B51 when the patients documented diagnosis matches "Plasmodium vivax malaria" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Plasmodium vivax malaria is B51.
No, B51 is non-billable. Use a more specific sub-code for primary diagnosis billing.
B51 is in Chapter 1 of the ICD-10-CM Tabular List.
Type 1 Excludes for B51 include: plasmodium vivax with Plasmodium falciparum (B50.-).
Yes, B51 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.