Convert ICD-10 A86 to ICD-9

ICD-10 code A86, Unspecified viral encephalitis, crosswalked to ICD-9 with the official CMS General Equivalence Mappings. Convert another code below.

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Official CMS General Equivalence Mappings Final GEMs release (FY 2018) Maps in both directions

1 ICD-9 mapping for ICD-10 A86

From the official CMS General Equivalence Mappings. Review each mapping's flags before selecting the final code. Convert another code

ICD-10 code A86, "Unspecified viral encephalitis", maps to ICD-9 code 049.9, "Viral encephalitis NOS". The mapping is flagged approximate: it is the closest available equivalent, not an exact match, so review the clinical documentation when selecting the final code. The crosswalk comes from the official CMS General Equivalence Mappings.

ICD‑10 Code

A86

Unspecified viral encephalitis

ICD‑9 Code

049.9

Viral encephalitis NOS

Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.

See everything about the source code, including its category, synonyms, and history: open the A86 code page → Or run the reverse crosswalk: convert 049.9 back to ICD-10 →