Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)

Alphabetical Index

Use the alphabetical index for the main term encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) to review the available sub terms and properly select the ICD-10 code with the highest degree of specificity. Instructional notations will guide the coder with information such as "see", "see also", "with", "without", "due to", and "code by site".

  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) - G04.90 Encephalitis and encephalomyelitis, unspecified
    • acute - See Also: Encephalitis, viral; - A86 Unspecified viral encephalitis
      • disseminated - G04.00 Acute disseminated encephalitis and encephalomyelitis, unspecified
        • infectious - G04.01 Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
        • noninfectious - G04.81 Other encephalitis and encephalomyelitis
        • postimmunization (postvaccination) - G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
        • postinfectious - G04.01 Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
      • inclusion body - A85.8 Other specified viral encephalitis
      • necrotizing hemorrhagic - G04.30 Acute necrotizing hemorrhagic encephalopathy, unspecified
        • postimmunization - G04.32 Postimmunization acute necrotizing hemorrhagic encephalopathy
        • postinfectious - G04.31 Postinfectious acute necrotizing hemorrhagic encephalopathy
        • specified NEC - G04.39 Other acute necrotizing hemorrhagic encephalopathy
    • arboviral, arbovirus NEC - A85.2 Arthropod-borne viral encephalitis, unspecified
    • arthropod-borne NEC (viral) - A85.2 Arthropod-borne viral encephalitis, unspecified
    • Australian - A83.4 Australian encephalitis
    • California (virus) - A83.5 California encephalitis
    • Central European (tick-borne) - A84.1 Central European tick-borne encephalitis
    • Czechoslovakian - A84.1 Central European tick-borne encephalitis
    • Dawson's (inclusion body) - A81.1 Subacute sclerosing panencephalitis
    • diffuse sclerosing - A81.1 Subacute sclerosing panencephalitis
    • disseminated, acute - G04.00 Acute disseminated encephalitis and encephalomyelitis, unspecified
    • due to
      • cat scratch disease - A28.1 Cat-scratch disease
      • human immunodeficiency virus (HIV) disease - B20 Human immunodeficiency virus [HIV] disease
      • malaria - See: Malaria;
      • rickettsiosis - See: Rickettsiosis;
      • smallpox inoculation - G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
      • typhus - See: Typhus;
    • Eastern equine - A83.2 Eastern equine encephalitis
    • endemic (viral) - A86 Unspecified viral encephalitis
    • epidemic NEC (viral) - A86 Unspecified viral encephalitis
    • equine (acute) (infectious) (viral) - A83.9 Mosquito-borne viral encephalitis, unspecified
      • Eastern - A83.2 Eastern equine encephalitis
      • Venezuelan - A92.2 Venezuelan equine fever
      • Western - A83.1 Western equine encephalitis
    • Far Eastern (tick-borne) - A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
    • following vaccination or other immunization procedure - G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
    • herpes zoster - B02.0 Zoster encephalitis
    • herpesviral - B00.4 Herpesviral encephalitis
      • due to herpesvirus 6 - B10.01 Human herpesvirus 6 encephalitis
      • due to herpesvirus 7 - B10.09 Other human herpesvirus encephalitis
      • specified NEC - B10.09 Other human herpesvirus encephalitis
    • Ilheus (virus) - A83.8 Other mosquito-borne viral encephalitis
    • in (due to)
      • actinomycosis - A42.82 Actinomycotic encephalitis
      • adenovirus - A85.1 Adenoviral encephalitis
      • African trypanosomiasis - B56.9 African trypanosomiasis, unspecified
      • Chagas' disease (chronic) - B57.42 Meningoencephalitis in Chagas' disease
      • cytomegalovirus - B25.8 Other cytomegaloviral diseases
      • enterovirus - A85.0 Enteroviral encephalitis
      • herpes (simplex) virus - B00.4 Herpesviral encephalitis
        • due to herpesvirus 6 - B10.01 Human herpesvirus 6 encephalitis
        • due to herpesvirus 7 - B10.09 Other human herpesvirus encephalitis
        • specified NEC - B10.09 Other human herpesvirus encephalitis
      • infectious disease NEC - B99 Other and unspecified infectious diseases
      • influenza - See: Influenza, with, encephalopathy;
      • listeriosis - A32.12 Listerial meningoencephalitis
      • measles - B05.0 Measles complicated by encephalitis
      • mumps - B26.2 Mumps encephalitis
      • naegleriasis - B60.2 Naegleriasis
      • parasitic disease NEC - B89 Unspecified parasitic disease
      • poliovirus - A80.9 Acute poliomyelitis, unspecified
      • rubella - B06.01 Rubella encephalitis
      • syphilis
        • congenital - A50.42 Late congenital syphilitic encephalitis
        • late - A52.14 Late syphilitic encephalitis
      • systemic lupus erythematosus - M32.19 Other organ or system involvement in systemic lupus erythematosus
      • toxoplasmosis (acquired) - B58.2 Toxoplasma meningoencephalitis
        • congenital - P37.1 Congenital toxoplasmosis
      • tuberculosis - A17.82 Tuberculous meningoencephalitis
      • zoster - B02.0 Zoster encephalitis
    • inclusion body - A81.1 Subacute sclerosing panencephalitis
    • infectious (acute) (virus) NEC - A86 Unspecified viral encephalitis
    • Japanese (B type) - A83.0 Japanese encephalitis
    • La Crosse - A83.5 California encephalitis
    • lead - See: Poisoning, lead;
    • lethargica (acute) (infectious) - A85.8 Other specified viral encephalitis
    • louping ill - A84.8 Other tick-borne viral encephalitis
    • lupus erythematosus, systemic - M32.19 Other organ or system involvement in systemic lupus erythematosus
    • lymphatica - A87.2 Lymphocytic choriomeningitis
    • Mengo - A85.8 Other specified viral encephalitis
    • meningococcal - A39.81 Meningococcal encephalitis
    • Murray Valley - A83.4 Australian encephalitis
    • otitic NEC - H66.40 Suppurative otitis media, unspecified, unspecified ear
    • parasitic NOS - B71.9 Cestode infection, unspecified
    • periaxial - G37.0 Diffuse sclerosis of central nervous system
    • periaxialis (concentrica) (diffuse) - G37.5 Concentric sclerosis [Balo] of central nervous system
    • postchickenpox - B01.11 Varicella encephalitis and encephalomyelitis
    • postexanthematous NEC - B09 Unspecified viral infection characterized by skin and mucous membrane lesions
    • postimmunization - G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
    • postinfectious NEC - G04.01 Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
    • postmeasles - B05.0 Measles complicated by encephalitis
    • postvaccinal - G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
    • postvaricella - B01.11 Varicella encephalitis and encephalomyelitis
    • postviral NEC - A86 Unspecified viral encephalitis
    • Powassan - A84.8 Other tick-borne viral encephalitis
    • Rasmussen - G04.81 Other encephalitis and encephalomyelitis
    • Rio Bravo - A85.8 Other specified viral encephalitis
    • Russian
      • autumnal - A83.0 Japanese encephalitis
      • spring-summer (taiga) - A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
    • saturnine - See: Poisoning, lead;
    • specified NEC - G04.81 Other encephalitis and encephalomyelitis
    • St. Louis - A83.3 St Louis encephalitis
    • subacute sclerosing - A81.1 Subacute sclerosing panencephalitis
    • summer - A83.0 Japanese encephalitis
    • suppurative - G04.81 Other encephalitis and encephalomyelitis
    • tick-borne - A84.9 Tick-borne viral encephalitis, unspecified
    • Torula, torular (cryptococcal) - B45.1 Cerebral cryptococcosis
    • toxic NEC - G92 Toxic encephalopathy
    • trichinosis - B75 Trichinellosis
    • type
      • B - A83.0 Japanese encephalitis
      • C - A83.3 St Louis encephalitis
    • van Bogaert's - A81.1 Subacute sclerosing panencephalitis
    • Venezuelan equine - A92.2 Venezuelan equine fever
    • Vienna - A85.8 Other specified viral encephalitis
    • viral, virus - A86 Unspecified viral encephalitis
      • arthropod-borne NEC - A85.2 Arthropod-borne viral encephalitis, unspecified
        • mosquito-borne - A83.9 Mosquito-borne viral encephalitis, unspecified
          • Australian X disease - A83.4 Australian encephalitis
          • California virus - A83.5 California encephalitis
          • Eastern equine - A83.2 Eastern equine encephalitis
          • Japanese (B type) - A83.0 Japanese encephalitis
          • Murray Valley - A83.4 Australian encephalitis
          • specified NEC - A83.8 Other mosquito-borne viral encephalitis
          • St. Louis - A83.3 St Louis encephalitis
          • type B - A83.0 Japanese encephalitis
          • type C - A83.3 St Louis encephalitis
          • Western equine - A83.1 Western equine encephalitis
        • tick-borne - A84.9 Tick-borne viral encephalitis, unspecified
          • biundulant - A84.1 Central European tick-borne encephalitis
          • central European - A84.1 Central European tick-borne encephalitis
          • Czechoslovakian - A84.1 Central European tick-borne encephalitis
          • diphasic meningoencephalitis - A84.1 Central European tick-borne encephalitis
          • Far Eastern - A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
          • Russian spring-summer (taiga) - A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
          • specified NEC - A84.8 Other tick-borne viral encephalitis
      • specified type NEC - A85.8 Other specified viral encephalitis
    • Western equine - A83.1 Western equine encephalitis

Clinical Terms

The following are some of the clinical term definitions related or applicable to encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) within the ICD-10 index for Diseases and Injuries.

Actinomycosis: Infections with bacteria of the genus ACTINOMYCES.

Adenoviridae: A family of non-enveloped viruses infecting mammals (MASTADENOVIRUS) and birds (AVIADENOVIRUS) or both (ATADENOVIRUS). Infections may be asymptomatic or result in a variety of diseases.

Encephalitis Virus, California: A species in the ORTHOBUNYAVIRUS genus of the family BUNYAVIRIDAE. Serotypes are found in temperate and arctic regions and each is closely associated with a single species of vector mosquito. The vertebrate hosts are usually small mammals but several serotypes infect humans.

Cytomegalovirus: A genus of the family HERPESVIRIDAE, subfamily BETAHERPESVIRINAE, infecting the salivary glands, liver, spleen, lungs, eyes, and other organs, in which they produce characteristically enlarged cells with intranuclear inclusions. Infection with Cytomegalovirus is also seen as an opportunistic infection in AIDS.

Enterovirus: A genus of the family PICORNAVIRIDAE whose members preferentially inhabit the intestinal tract of a variety of hosts. The genus contains many species. Newly described members of human enteroviruses are assigned continuous numbers with the species designated "human enterovirus".

Herpes Zoster: An acute infectious, usually self-limited, disease believed to represent activation of latent varicella-zoster virus (HERPESVIRUS 3, HUMAN) in those who have been rendered partially immune after a previous attack of CHICKENPOX. It involves the SENSORY GANGLIA and their areas of innervation and is characterized by severe neuralgic pain along the distribution of the affected nerve and crops of clustered vesicles over the area. (From Dorland, 27th ed)

Inclusion Bodies: A generic term for any circumscribed mass of foreign (e.g., lead or viruses) or metabolically inactive materials (e.g., ceroid or MALLORY BODIES), within the cytoplasm or nucleus of a cell. Inclusion bodies are in cells infected with certain filtrable viruses, observed especially in nerve, epithelial, or endothelial cells. (Stedman, 25th ed)

Influenza, Human: An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia.

Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb.

Listeriosis: Infections with bacteria of the genus LISTERIA.

Louping Ill: An acute tick-borne arbovirus infection causing meningoencephalomyelitis of sheep.

Lupus Erythematosus, Systemic: A chronic, relapsing, inflammatory, and often febrile multisystemic disorder of connective tissue, characterized principally by involvement of the skin, joints, kidneys, and serosal membranes. It is of unknown etiology, but is thought to represent a failure of the regulatory mechanisms of the autoimmune system. The disease is marked by a wide range of system dysfunctions, an elevated erythrocyte sedimentation rate, and the formation of LE cells in the blood or bone marrow.

Malaria: A protozoan disease caused in humans by four species of the PLASMODIUM genus: PLASMODIUM FALCIPARUM; PLASMODIUM VIVAX; PLASMODIUM OVALE; and PLASMODIUM MALARIAE; and transmitted by the bite of an infected female mosquito of the genus ANOPHELES. Malaria is endemic in parts of Asia, Africa, Central and South America, Oceania, and certain Caribbean islands. It is characterized by extreme exhaustion associated with paroxysms of high FEVER; SWEATING; shaking CHILLS; and ANEMIA. Malaria in ANIMALS is caused by other species of plasmodia.

Measles: A highly contagious infectious disease caused by MORBILLIVIRUS, common among children but also seen in the nonimmune of any age, in which the virus enters the respiratory tract via droplet nuclei and multiplies in the epithelial cells, spreading throughout the MONONUCLEAR PHAGOCYTE SYSTEM.

Mumps: An acute infectious disease caused by RUBULAVIRUS, spread by direct contact, airborne droplet nuclei, fomites contaminated by infectious saliva, and perhaps urine, and usually seen in children under the age of 15, although adults may also be affected. (From Dorland, 28th ed)

Poliovirus: A species of ENTEROVIRUS which is the causal agent of POLIOMYELITIS in humans. Three serotypes (strains) exist. Transmission is by the fecal-oral route, pharyngeal secretions, or mechanical vector (flies). Vaccines with both inactivated and live attenuated virus have proven effective in immunizing against the infection.

Rubella: An acute infectious disease caused by the RUBELLA VIRUS. The virus enters the respiratory tract via airborne droplet and spreads to the LYMPHATIC SYSTEM.

Syphilis: A contagious venereal disease caused by the spirochete TREPONEMA PALLIDUM.

Tuberculosis: Any of the infectious diseases of man and other animals caused by species of MYCOBACTERIUM TUBERCULOSIS.