2025 ICD-10-CM Diagnosis Code G93.42

Megalencephalic leukoencephalopathy with subcortical cysts

  • G93.42 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • ICD-10-CM G93.42 is a revised 2025 ICD-10-CM code that became effective on October 1, 2024.
  • This is the American ICD-10-CM version of G93.42 – other international versions of ICD-10 G93.42 may differ.

The following code(s) above G93.42 contain annotation back-references

 that may be applicable to G93.42:

  • G00-G99  Diseases of the nervous system
  • G93.4  Other and unspecified encephalopathy

ICD-10-CM G93.42 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 070 Nonspecific cerebrovascular disorders with mcc
  • 071 Nonspecific cerebrovascular disorders with cc
  • 072 Nonspecific cerebrovascular disorders without cc/mcc
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Code History

  • 2024 (effective 10/1/2023): New code
  • 2025 (effective 10/1/2024): Revised code
    • New description: Megalencephalic leukoencephalopathy with subcortical cysts
    • 2024 description: Megaloencephalic leukoencephalopathy with subcortical cysts

Diagnosis Index entries containing back-references to G93.42:

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