ICD-10 Code
International Classification of Diseases, 10th Revision
Feb 20, 2019

See: Other viral encephalitis, not elsewhere classified

A85 is NOT a complete or valid ICD 10 diagnosis code.

You should code each health care encounter to the level of certainty known for that encounter. When sufficient clinical information is not known or available to assign a more specific code, it is acceptable to report the appropriate unspecified code.

See below for more specifc codes relating to
Other viral encephalitis, not elsewhere classified
  • specified viral encephalomyelitis NEC
  • specified viral meningoencephalitis NEC
  • benign myalgic encephalomyelitis (G93.3)
  • encephalitis due to cytomegalovirus (B25.8)
  • encephalitis due to herpesvirus [herpes simplex] (B00.4)
  • encephalitis due to herpesvirus NEC (B10.0-)
  • encephalitis due to measles virus (B05.0)
  • encephalitis due to mumps virus (B26.2)
  • encephalitis due to poliomyelitis virus (A80.-)
  • encephalitis due to zoster (B02.0)
  • lymphocytic choriomeningitis (A87.2)

More specific codes for Other viral encephalitis, not elsewhere classified

  • A85.0 - Enteroviral encephalitis
  • A85.1 - Adenoviral encephalitis
  • A85.2 - Arthropod-borne viral encephalitis, unspecified
  • A85.8 - Other specified viral encephalitis
See also ICD 10 code for
Back to A85
See the ICD-10-CM Coding Guidelines.

Questions related to A85 Other viral encephalitis, not elsewhere classified

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.