ICD-10 B58
Non-Billable HeaderToxoplasmosis
About ICD-10-CM B58
ICD-10-CM code B58 represents Toxoplasmosis. This is a non-billable header code in the Infectious and Parasitic Diseases chapter (block B58). The 2026 edition of ICD-10-CM B58 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with B58. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- congenital toxoplasmosis (P37.1)
Includes
- infection due to Toxoplasma gondii
Medicare LCD Coverage for B58
Local Coverage Determinations (LCDs) from CMS MACs that list B58 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B58.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but B58 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with B58
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To B58
Other codes in section B50-B64 (Protozoal diseases).
ICD-10 B58, Billing FAQ
Is ICD-10 code B58 billable? +
No, B58 is a non-billable header code. Use a more specific child code from block B58 when submitting claims.
What codes are Type 1 Excludes for B58? +
Type 1 Excludes (never code together with B58): congenital toxoplasmosis (P37.1)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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