All ICD10 Codes
B58Not billable, use a more specific code below

Toxoplasmosis

In Protozoal diseases (B50-B64), chapter 1: Certain Infectious and Parasitic Diseases

11 billable codes under B58: 3 are an MCC, 8 are a CC; 2 map to HCC 6 (Opportunistic Infections).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Includes: conditions that are coded here

  • infection due to Toxoplasma gondii

Excludes1: not coded here, use a different code

  • congenital toxoplasmosis (P37.1)

Also applies, from Protozoal diseases (B50-B64)

These notes sit on B50-B64 and apply to every code under it, including B58.

Excludes1: not coded here, use a different code

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.

Read Section I.C.1 (page 19)

All codes under B58

B58 can't be used on a claim. Pick a billable code below; grey headings group them.

B58 MS-DRGs

As the principal diagnosis, the billable codes under B58 group to these 24 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Read more about toxoplasmosis on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.