Home > 2008 ICD-9-CM Diagnosis Codes > Diseases Of The Nervous System And Sense Organs 320-389 > Inflammatory Diseases Of The Central Nervous System 320-327 > Encephalitis myelitis and encephalomyelitis 323-
2008 ICD-9-CM Diagnosis Code 323.9
Unspecified cause of encephalitis
- Short description: ENCEPHALITIS NOS.
- ICD-9-CM 323.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
- You are viewing the 2008 version of ICD-9-CM 323.9.
- More recent version(s) of ICD-9-CM 323.9: 2009 2010 2011 2012 2013.
323.9 Alternative Terminology
- Acute and subacute hemorrhagic leukoencephalitis [hurst]
- Acute ascending myelitis
- Acute necrotizing myelitis
- Acute non-infective transverse myelitis
- Acute transverse myelitis
- Acute viral transverse myelitis
- Brainstem encephalitis
- Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
- Cerebral irritation
- Encephalitis
- Encephalitis associated with aids
- Encephalitis, myelitis and encephalomyelitis
- Encephalomyelitis
- Focal encephalitis
- Fungal infection of brain
- Granulomatous meningoencephalitis
- Granulomatous meningoencephalomyelitis
- Inflammation of spinal cord due to toxin
- Leukoencephalopathy
- Limbic encephalitis
- Meningoencephalomyelitis
- Meningomyelitis
- Myelitis
- Myelitis associated with aids
- Primary encephalitis
- Rasmussen syndrome
- Subacute hemorrhagic leukoencephalitis
- Subacute necrotizing myelitis
- Transverse myelopathy syndrome
Convert 323.9 to ICD-10-CM 
ICD-9-CM Volume 2 Index entries containing back-references to 323.9:
- Encephalitis (bacterial) (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) 323.9
acute - see also Encephalitis, viral
- arboviral, arbovirus NEC 064
- arthropod-borne (see also Encephalitis, viral, arthropod-borne) 064
- Australian X 062.4
- Bwamba fever 066.3
- California (virus) 062.5
- Central European 063.2
- Czechoslovakian 063.2
- Dawson's (inclusion body) 046.2
- diffuse sclerosing 046.2
- due to
actinomycosis 039.8 [323.41]- cat-scratch disease 078.3 [323.01]
- human herpesvirus 6 058.21
- human herpesvirus 7 058.29
- human herpesvirus NEC 058.29
- infection classified elsewhere 136.9 [323.41]
- infectious mononucleosis 075 [323.01]
- malaria (see also Malaria) 084.6 [323.2]
- negishi virus 064
- ornithosis 073.7 [323.01]
- prophylactic inoculation against smallpox 323.51
- rickettsiosis (see also Rickettsiosis) 083.9 [323.1]
- rubella 056.01
- toxoplasmosis (acquired) 130.0
- typhus (fever) (see also Typhus) 081.9 [323.1]
vaccination (smallpox) 323.51
- Eastern equine 062.2
- endemic 049.8
- epidemic 049.8
- Far Eastern 063.0
- following vaccination or other immunization procedure 323.51
- herpes 054.3
- human herpesvirus 6 058.21
- human herpesvirus 7 058.29
- human herpesvirus NEC 058.29
- ilheus (virus) 062.8
- inclusion body 046.2
- infectious (acute) (virus) NEC 049.8
- Japanese (B type) 062.0
- La Crosse 062.5
- Langat 063.8
- late effect - see Late, effect, encephalitis
- lethargic (acute) (infectious) (influenzal) 049.8
- lethargica 049.8
- louping ill 063.1
- lymphatica 049.0
- Mengo 049.8
- meningococcal 036.1
- mumps 072.2
- Murray Valley 062.4
- myoclonic 049.8
- Negishi virus 064
- periaxialis (concentrica) (diffusa) 341.1
- postchickenpox 052.0
- postimmunization 323.51
- postmeasles 055.0
- posttraumatic 323.81
- postvaccinal (smallpox) 323.51
- postvaricella 052.0
- Powassan 063.8
- progressive subcortical (Binswanger's) 290.12
- Rasmussen 323.81
- Rio Bravo 049.8
- rubella 056.01
- Semliki Forest 062.8
- serous 048
- slow-acting virus NEC 046.8
- specified cause NEC 323.81
- St. Louis type 062.3
- subacute sclerosing 046.2
- subcorticalis chronica 290.12
- summer 062.0
- suppurative 324.0
- tick-borne 063.9
- tuberculous (see also Tuberculosis) 013.6
- type B (Japanese) 062.0
- type C 062.3
- van Bogaert's 046.2
- Venezuelan 066.2
- Vienna type 049.8
- viral, virus 049.9
- von Economo's 049.8
- Western equine 062.1
- West Nile type 066.41
- Encephalomyelitis (chronic) (granulomatous) (hemorrhagic necrotizing, acute) (myalgic, benign) (see also Encephalitis) 323.9
- abortive disseminated 049.8
- due to
- funicularis infectiosa 049.8
- late effect - see Late, effect, encephalitis
- Munch-Peterson's 049.8
- postchickenpox 052.0
- postimmunization 323.51
- postmeasles 055.0
- postvaccinal (smallpox) 323.51
- rubella 056.01
- specified cause NEC 323.81
- syphilitic 094.81
- West Nile 066.41
- Fever 780.6
- brain 323.9
- late effect - see category 326
- cerebral 323.9
late effect - see category 326
- Hematomyelitis 323.9
- late effect - see category 326
- Infection, infected, infective (opportunistic) 136.9
- brain (see also Encephalitis) 323.9
- Inflammation, inflamed, inflammatory (with exudation)
- brain (see also Encephalitis) 323.9
- late effect - see category 326
- membrane - see Meningitis
- cerebral (see also Encephalitis) 323.9
- late effect - see category 326
- membrane - see Meningitis
- spinal
- cord (see also Encephalitis) 323.9
- late effect - see category 326
- membrane - see Meningitis
- nerve - see Disorder, nerve
- Leukoencephalopathy (see also Encephalitis) 323.9
- acute necrotizing hemorrhagic (postinfectious) 136.9 [323.61]
- postimmunization or postvaccinal 323.51
- metachromatic 330.0
- multifocal (progressive) 046.3
- progressive multifocal 046.3
- Meningoencephalitis (see also Encephalitis) 323.9
- acute NEC 048
- bacterial, purulent, pyogenic, or septic - see Meningitis
- chronic NEC 094.1
- diffuse NEC 094.1
- diphasic 063.2
- due to
- actinomycosis 039.8 [320.7]
- blastomycosis NEC (see also Blastomycosis) 116.0 [323.41]
- free-living amebae 136.2
- Listeria monocytogenes 027.0 [320.7]
- Lyme disease 088.81 [320.7]
- mumps 072.2
- Naegleria (amebae) (gruberi) (organisms) 136.2
- rubella 056.01
- sporotrichosis 117.1 [321.1]
- toxoplasmosis (acquired) 130.0
- Trypanosoma 086.1 [323.2]
- epidemic 036.0
- herpes 054.3
- herpetic 054.3
- H. influenzae 320.0
- infectious (acute) 048
- influenzal 320.0
- late effect - see category 326
- lymphocytic (serous) 049.0
- mumps 072.2
- pneumococcal 320.1
- primary amebic 136.2
- rubella 056.01
- specific 094.2
- staphylococcal 320.3
- streptococcal 320.2
- syphilitic 094.2
- toxoplasmosis (acquired) 130.0
- tuberculous (see also Tuberculosis, meninges) 013.0
- virus NEC 048
- Meningoencephalomyelitis (see also Meningoencephalitis) 323.9
- due to
- late effect - see category 326
- Meningomyelitis (see also Meningoencephalitis) 323.9
- due to
- late effect - see category 326
- lethargic 049.8
- meningococcal 036.0
- syphilitic 094.2
- tuberculous (see also Tuberculosis, meninges) 013.0
- Mesencephalitis (see also Encephalitis) 323.9
- late effect - see category 326
- Myelitis (ascending) (cerebellar) (childhood) (chronic) (descending) (diffuse) (disseminated) (pressure) (progressive) (spinal cord) (subacute) (see also Encephalitis) 323.9
- due to
- herpes simplex 054.74
- herpes zoster 053.14
- late effect - see category 326
- optic neuritis in 341.0
- postchickenpox 052.2
- postimmunization 323.52
- postvaccinal 323.52
- postvaricella 052.2
- syphilitic (transverse) 094.89
- transverse 323.82
- tuberculous (see also Tuberculosis) 013.6
- virus 049.9
- Parencephalitis (see also Encephalitis) 323.9
- late effect - see category 326
- Phrenitis 323.9
- Syringomyelitis 323.9
- late effect - see category 326
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 323.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2008 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.
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