2026 ICD-10-CM Diagnosis Code B53.0Plasmodium ovale malaria

ICD-10-CM Codes›A00–B99›B50-B64›B53

ICD-10-CM B53.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B53.0 is a billable ICD-10-CM diagnosis code for plasmodium ovale malaria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. Coders also document this condition as ovale malaria. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B53.0
Billable Status
Yes — Valid for Submission
Code Describes
Plasmodium ovale malaria
Short Description
Plasmodium ovale malaria
Same as the full description in the CMS dataset.
Parent Code
B53
Other specified malaria

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB53Other specified malaria
This CodeB53.0Plasmodium ovale malaria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ovale malaria

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • Plasmodium ovale with Plasmodium falciparum B50
  • Plasmodium ovale with Plasmodium malariae B52
  • Plasmodium ovale with Plasmodium vivax B51

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)
      • Plasmodium ovale
    • Malaria, malarial(fever)
      • ovale
    • Malaria, malarial(fever)
      • Plasmodium (P.)
        • ovale

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Malaria

Malaria is a serious disease caused by a parasite. You get it when an infected mosquito bites you. Malaria is a major cause of death worldwide, but it is almost wiped out in the United States. The disease is mostly a problem in developing countries with warm climates. If you travel to these countries, you are at risk.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert B53.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
084.3 Ovale malaria
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B53.0Overview

Is B53.0 (Other specified malaria) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report plasmodium ovale malaria on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B53.0 group to?

When plasmodium ovale malaria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B53.0?

Under the General Equivalence Mappings, plasmodium ovale malaria converts to ICD-9-CM 084.3 (ovale malaria). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.