Alphabetic Index FY2027

G93.4

Other and unspecified encephalopathy

FY2027Chapter 6: Diseases of the nervous system/G89–G99 Other disorders of the nervous system

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

G93.4 is a non-billable ICD-10-CM code header for other and unspecified encephalopathy. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G93.40 Encephalopathy, unspecified; G93.41 Metabolic encephalopathy; G93.42 Megalencephalic leukoencephalopathy with subcortical cysts; G93.43 Leukoencephalopathy with calcifications and cysts and 3 more. Its coding notes include 12 Excludes2 entries.

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • alcoholic encephalopathy (G31.2)
  • encephalopathy in diseases classified elsewhere (G94)
  • hypertensive encephalopathy (I67.4)
  • toxic (metabolic) encephalopathy (G92.8)
Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More specific codes under G93.4 7