G93.40 – Encephalopathy, unspecified
ICD-10-CM 2027 diagnosis code · Other disorders of the nervous system
ICD-10-CM code
G93.40
- Code
G93.40(claims format:G9340)- Description
- Encephalopathy, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 6. Diseases of the nervous system (G00-G99)
- Block
- G89-G99 Other disorders of the nervous system
- Parent codes
- G93 › G93.4
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
G93.4 – Other and unspecified encephalopathy
Index terms for G93.40
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in G93.4
- G93.41 – Metabolic encephalopathyBillable
- G93.42 – Megalencephalic leukoencephalopathy with subcortical cystsBillable
- G93.43 – Leukoencephalopathy with calcifications and cystsBillable
- G93.44 – Adult-onset leukodystrophy with axonal spheroidsBillable
- G93.45 – Developmental and epileptic encephalopathyBillable
- G93.49 – Other encephalopathyBillable
Frequently asked questions
What is ICD-10 code G93.40?
G93.40 is the ICD-10-CM code for encephalopathy, unspecified, in the block G89-G99 (Other disorders of the nervous system).
Is G93.40 a billable code?
Yes. G93.40 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does G93.40 belong to?
It belongs to category G93 – Other disorders of brain.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.