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ICD-10-CM 2027

ICD-10 code for atypical infection

Choose a code from the options below based on the documentation.

From the official ICD-10-CM alphabetic index entry “Infection, infected, infective (opportunistic) › atypical”. Page updated September 29, 2026.

About coding atypical infection

The official ICD-10-CM index doesn't give a single default code for atypical infection; the code depends on the details below.

More specific atypical infection codes (official index)

  • acid-fast (bacilli)
  • mycobacteria
  • virus A81.9 — Atypical virus infection of central nervous system, unspecified
  • specified type NEC A81.89 — Other atypical virus infections of central nervous system

Common questions about atypical infection ICD-10 codes

What is the ICD-10 code for virus atypical infection?

A81.9 — Atypical virus infection of central nervous system, unspecified.