2026 ICD-10-CM Diagnosis Code B58.89Toxoplasmosis with other organ involvement

ICD-10-CM Codes›A00–B99›B50-B64›B58

ICD-10-CM B58.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B58.89 is a billable ICD-10-CM diagnosis code for toxoplasmosis with other organ involvement. 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, 974 through 976. Coders also document this condition as acquired disseminated toxoplasmosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B58.89
Billable Status
Yes — Valid for Submission
Code Describes
Toxoplasmosis with other organ involvement
Short Description
Toxoplasmosis with other organ involvement
Same as the full description in the CMS dataset.
Parent Code
B58.8
Toxoplasmosis with other organ involvement

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB58Toxoplasmosis
This CodeB58.89Toxoplasmosis with other organ involvement

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired disseminated toxoplasmosis
  • Acute lymphadenopathic toxoplasmosis
  • Cutaneous toxoplasmosis
  • Lymphadenitis caused by Toxoplasma gondii
  • Multisystemic disseminated toxoplasmosis
  • Myelitis caused by Toxoplasma gondii
  • Parasitic infection causing myelitis
  • Protozoal myelitis

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.

    • Lymphadenopathy(generalized)
      • due to toxoplasmosis (acquired)
    • Toxoplasma, toxoplasmosis(acquired)
      • with
        • other organ involvement

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

Toxoplasmosis

Toxoplasmosis is a disease caused by the parasite Toxoplasma gondii. More than 60 million people in the U.S. have the parasite. Most of them don't get sick. But the parasite causes serious problems for some people. These include people with weak immune systems and babies whose mothers become infected for the first time during pregnancy.

Read the full article at MedlinePlus

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

Convert B58.89 to ICD-9-CMHistory

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

ICD-9-CM
130.7 Toxoplasmosis site NEC
Approximate The match is approximate rather than exact.

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 B58.89Overview

Is B58.89 (Toxoplasmosis with other organ involvement) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report toxoplasmosis with other organ involvement on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B58.89 group to?

When toxoplasmosis with other organ involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, 974, 975, 976, with relative weights from 0.7297 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B58.89?

Under the General Equivalence Mappings, toxoplasmosis with other organ involvement converts to ICD-9-CM 130.7 (toxoplasmosis site NEC). The mapping is approximate, so confirm the match fits the documentation.

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.