A06 vs B58

A06 (Amebiasis) compared with B58 (Toxoplasmosis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. B58 carries an Excludes1 note covering A06: “amebiasis (A06.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

	A06Amebiasis	B58Toxoplasmosis
Billing status	Non-billable header Report instead: A06.0, A06.1, A06.2, A06.3, A06.4	Non-billable header Report instead: B58.00, B58.01, B58.09, B58.1, B58.2
Classification	A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99)	A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99)
Definition	Amebiasis is a non-billable ICD-10-CM category code (A06).	Toxoplasmosis is a non-billable ICD-10-CM category code (B58).
Includes	infection due to Entamoeba histolytica	infection due to Toxoplasma gondii

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources