ICD-10-CM 2027 diagnosis code

B58Toxoplasmosis

Not billable — use a more specific code

B58 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B58

B58 is the ICD-10-CM diagnosis code for toxoplasmosis. It belongs to block B50-B64 (protozoal diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B58.0 (oculopathy), B58.1 (hepatitis), B58.2 (meningoencephalitis), B58.3 (toxoplasmosis), B58.8 (with other organ involvement) and B58.9 (unspecified).

Don't report B58 together with the conditions in its Excludes1 note: congenital toxoplasmosis (P37.1).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B58

Coding notes

IncludesFurther defines the content of the category

infection due to Toxoplasma gondii

Excludes1Not coded here — never report together with this code

congenital toxoplasmosis (P37.1)

Notes that apply from higher levels

Instructions written at a parent level also apply to B58.

Broader instructions also apply from B50-B64 Protozoal diseases and Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
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2023
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2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B58

Is B58 billable?: No. B58 is a header code. Report one of its more specific subcodes instead.