2022 ICD-10-CM Code B58.9

Toxoplasmosis, unspecified

Version 2021

Valid for Submission

ICD-10:B58.9
Short Description:Toxoplasmosis, unspecified
Long Description:Toxoplasmosis, unspecified

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Protozoal diseases (B50-B64)
      • Toxoplasmosis (B58)

B58.9 is a billable diagnosis code used to specify a medical diagnosis of toxoplasmosis, unspecified. The code B58.9 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code B58.9 might also be used to specify conditions or terms like coccidiosis co-occurrent with human immunodeficiency virus infection, infection caused by coccidia co-occurrent with acquired immunodeficiency syndrome, infection caused by toxoplasma, infection caused by toxoplasma gondii co-occurrent with acquired immunodeficiency syndrome, multisystemic disseminated toxoplasmosis , piringer-kuchinka's syndrome, etc.

Unspecified diagnosis codes like B58.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code B58.9 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Clinical Information

Convert B58.9 to ICD-9 Code

Information for Patients


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. Problems can include damage to the brain, eyes, and other organs.

You can get toxoplasmosis from

Most people with toxoplasmosis don't need treatment. There are drugs to treat it for pregnant women and people with weak immune systems.

Centers for Disease Control and Prevention


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)