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B58.2

B58.2: Toxoplasma meningoencephalitis

Billable / specific codeICD-10-CM

B58.2 is a billable, specific ICD-10-CM code for toxoplasma meningoencephalitis. It is valid for submission on a claim.

Check B58.2 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above B58.2

A category’s note binds every code beneath it.

Written on B58: Toxoplasmosis

  • congenital toxoplasmosis (P37.1)

Other codes that can never be billed with B58.2

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

Risk adjustment

B58.2 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 6 Opportunistic Infections0.381 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

B58.2 is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A53060Billing and Coding: Ophthalmology: Extended Ophthalmoscopy and Fundus Photography
  • A56612Billing and Coding: CT of the Head
  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Alphabetic index entries that lead here

  • Encephalitis›in›toxoplasmosis(acquired)
  • Meningoencephalitis›in›toxoplasmosis(acquired)
  • Meningoencephalomyelitis›due to›Toxoplasma or toxoplasmosis(acquired)
  • Toxoplasma, toxoplasmosis›with›meningoencephalitis

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under B58

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.