Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere (G05)

Browse all the diagnosis codes used for encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere (g05). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Clinical Information

Cerebral Phaeohyphomycosis - CNS infections caused by neurotropic dematiaceous fungi that contain melanin in their cell walls. The infections often result in BRAIN ABSCESS; ENCEPHALITIS; and MENINGITIS in patients who are often immunocompetent. The common causative fungi include members Cladophialophora bantiana, Exophiala dermatitidis, Rhinocladiella mackenziei, and Ochroconis gallopavum. R. mackenziei infection is seen almost exclusively in patients from the MIDDLE EAST.

Dengue - An acute febrile disease transmitted by the bite of AEDES mosquitoes infected with DENGUE VIRUS. It is self-limiting and characterized by fever, myalgia, headache, and rash. SEVERE DENGUE is a more virulent form of dengue.

Dengue Vaccines - Vaccines or candidate vaccines used to prevent infection with DENGUE VIRUS. These include live-attenuated, subunit, DNA, and inactivated vaccines.

Dengue Virus - A species of the genus FLAVIVIRUS which causes an acute febrile and sometimes hemorrhagic disease in man. Dengue is mosquito-borne and four serotypes are known.

Flavivirus - A genus of FLAVIVIRIDAE containing several subgroups and many species. Most are arboviruses transmitted by mosquitoes or ticks. The type species is YELLOW FEVER VIRUS.

Limbic Encephalitis - A paraneoplastic syndrome marked by degeneration of neurons in the LIMBIC SYSTEM. Clinical features include HALLUCINATIONS, loss of EPISODIC MEMORY; ANOSMIA; AGEUSIA; TEMPORAL LOBE EPILEPSY; DEMENTIA; and affective disturbance (depression). Circulating anti-neuronal antibodies (e.g., anti-Hu; anti-Yo; anti-Ri; and anti-Ma2) and small cell lung carcinomas or testicular carcinoma are frequently associated with this syndrome.

Phaeohyphomycosis - OPPORTUNISTIC INFECTIONS caused by the dematiaceous (darkly pigmented) MITOSPORIC FUNGI of ALTERNARIA, Bipolaris, CLADOSPORIUM, Curvularia, and EXOPHIALA. These fungi have pigmented HYPHAE due to MELANIN in the cell wall. The initial subcutaneous cyst from the infection can become systemic and spread rapidly to renal, pulmonary and cerebral systems (see CEREBRAL PHAEOHYPHOMYCOSIS) in an IMMUNOCOMPROMISED HOST.

Severe Dengue - A virulent form of dengue characterized by THROMBOCYTOPENIA and an increase in vascular permeability (grades I and II) and distinguished by a positive pain test (e.g., TOURNIQUET PAIN TEST). When accompanied by SHOCK (grades III and IV), it is called dengue shock syndrome.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • underlying disease, such as:
  • congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis P37.1
  • cytomegaloviral encephalitis, myelitis and encephalomyelitis B25.8
  • encephalitis, myelitis and encephalomyelitis in systemic lupus erythematosus M32.19
  • eosinophilic meningoencephalitis B83.2
  • human immunodeficiency virus [HIV] disease B20
  • poliovirus A80
  • suppurative otitis media H66.01 H66.4
  • systemic lupus erythematosus M32.19
  • trichinellosis B75

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • adenoviral encephalitis, myelitis and encephalomyelitis A85.1
  • encephalitis, myelitis and encephalomyelitis in measles B05.0
  • enteroviral encephalitis, myelitis and encephalomyelitis A85.0
  • herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis B00.4
  • listerial encephalitis, myelitis and encephalomyelitis A32.12
  • meningococcal encephalitis, myelitis and encephalomyelitis A39.81
  • mumps encephalitis, myelitis and encephalomyelitis B26.2
  • postchickenpox encephalitis, myelitis and encephalomyelitis B01.1
  • rubella encephalitis, myelitis and encephalomyelitis B06.01
  • toxoplasmosis encephalitis, myelitis and encephalomyelitis B58.2
  • zoster encephalitis, myelitis and encephalomyelitis B02.0