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ICD-9-CM diagnosis code (retired)

323.61 — Infectious acute disseminated encephalomyelitis (ADEM)

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 323.61

323.61 is an ICD-9-CM diagnosis code for infectious acute disseminated encephalomyelitis (ADEM). ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 3 ICD-10-CM codes, such as G04.00 (Acute disseminated encephalitis and encephalomyelitis, unspecified), G04.01 (Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)) and G04.39 (Other acute necrotizing hemorrhagic encephalopathy). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 323.61

What is the ICD-10 code for ICD-9 323.61?

The GEMs map 323.61 to ICD-10-CM G04.00, G04.01 and G04.39.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.