323.61 INF AC DIS ENCEPHALOMYEL


Code Information

Diagnosis Code: 323.61

Short Description: Inf ac dis encephalomyel

Long Description: Infectious acute disseminated encephalomyelitis (ADEM)

Code Classification:

  • Diseases of the nervous system (320–359)
    • Inflammatory diseases of the central nervous system (320-327)
      • 323 Encephalitis, myelitis, and encephalomyelitis
        • 323.61 Inf ac dis encephalomyel

This code is valid for manifestations not allowed as principal diagnosis

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 323.61 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • ADEM (acute disseminated encephalomyelitis) (postinfectious) 136.9 [323.61]
    • infectious 136.9 [323.61]
    • noninfectious 323.81
  • Encephalitis (bacterial) (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) 323.9
    • acute - see also Encephalitis, viral
      • disseminated (postinfectious) NEC 136.9 [323.61]
        • postimmunization or postvaccination 323.51
  • Encephalomyelitis (chronic) (granulomatous) (myalgic, benign) (see also Encephalitis) 323.9
    • acute disseminated (ADEM) (postinfectious) 136.9 [323.61]
      • infectious 136.9 [323.61]
      • noninfectious 323.81
      • postimmunization 323.51
  • Encephalopathy (acute) 348.30
    • necrotizing
      • hemorrhagic (acute) 323.61
  • Leukoencephalitis
    • acute hemorrhagic (postinfectious) NEC 136.9 [323.61]
      • postimmunization or postvaccinal 323.51
  • Leukoencephalopathy (see also Encephalitis) 323.9
    • acute necrotizing hemorrhagic (postinfectious) 136.9 [323.61]
      • postimmunization or postvaccinal 323.51
  • Meningoencephalomyelitis (see also Meningoencephalitis) 323.9
    • acute NEC 048
      • disseminated (postinfectious) 136.9 [323.61]
        • postimmunization or postvaccination 323.51
  • Myelinoclasis, perivascular, acute (postinfectious) NEC 136.9 [323.61]
    • postimmunization or postvaccinal 323.51

Crosswalk Information

The code 323.61 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
323.61 Right Arrow G04.00 Acute disseminated encephalitis and encephalomyelitis, unsp
G04.01 Postinfect acute dissem encephalitis and encephalomyelitis
G04.39 Other acute necrotizing hemorrhagic encephalopathy
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description
323.01 Encephalitis and encephalomyelitis in viral diseases classified elsewhere
323.02 Myelitis in viral diseases classified elsewhere
323.1 Encephalitis, myelitis, and encephalomyelitis in rickettsial diseases classified elsewhere
323.2 Encephalitis, myelitis, and encephalomyelitis in protozoal diseases classified elsewhere
323.41 Other encephalitis and encephalomyelitis due to other infections classified elsewhere
323.42 Other myelitis due to other infections classified elsewhere
323.51 Encephalitis and encephalomyelitis following immunization procedures
323.52 Myelitis following immunization procedures
323.62 Other postinfectious encephalitis and encephalomyelitis
323.63 Postinfectious myelitis
323.71 Toxic encephalitis and encephalomyelitis
323.72 Toxic myelitis
323.81 Other causes of encephalitis and encephalomyelitis
323.82 Other causes of myelitis
323.9 Unspecified causes of encephalitis, myelitis, and encephalomyelitis


This page was last updated on: 10/1/2014