ICD10
ICD-10 Code G93.4: Other and unspecified encephalopathy
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents other and unspecified encephalopathy in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G89-G99Other disorders of the nervous system
category
G93Other disorders of brain
currentG93
Official coding notes
Excludes2 (may code together if documented)
- alcoholic encephalopathy (G31.2)
- encephalopathy in diseases classified elsewhere (G94)
- hypertensive encephalopathy (I67.4)
- toxic (metabolic) encephalopathy (G92.8)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
NeurologistGeneral Physician
Related codes
G93.40Encephalopathy, unspecifiedcodeG93.41Metabolic encephalopathycodeG93.42Megalencephalic leukoencephalopathy with subcortical cystscodeG93.43Leukoencephalopathy with calcifications and cystscodeG93.44Adult-onset leukodystrophy with axonal spheroidscodeG93.45Developmental and epileptic encephalopathycodeG93.49Other encephalopathycode
Sibling codes
G93.0Cerebral cystsbillableG93.1Anoxic brain damage, not elsewhere classifiedbillableG93.2Benign intracranial hypertensionbillableG93.3Postviral and related fatigue syndromesG93.5Compression of brainbillableG93.6Cerebral edemabillableG93.7Reye's syndromebillableG93.8Other specified disorders of brainG93.9Disorder of brain, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 292871000119100high
Acquired pseudoporencephaly
Source: SNOMED International ICD-10 map
SNOMED_CT 1340040004high
Acute reversible leukoencephalopathy with increased urinary alpha-ketoglutarate
Source: SNOMED International ICD-10 map
SNOMED_CT 78689005high
Chronic brain syndrome
Source: SNOMED International ICD-10 map
SNOMED_CT 1222661007high
Early-onset calcifying leucoencephalopathy, skeletal dysplasia
Source: SNOMED International ICD-10 map
SNOMED_CT 733198005high
Encephalopathy due to and following cardiopulmonary bypass
Source: SNOMED International ICD-10 map
SNOMED_CT 723359002high
Familial acute necrotizing encephalopathy
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
G93.4
Replacement codes
G93.40 — Encephalopathy, unspecifiedG93.41 — Metabolic encephalopathyG93.42 — Megalencephalic leukoencephalopathy with subcortical cystsG93.43 — Leukoencephalopathy with calcifications and cystsG93.44 — Adult-onset leukodystrophy with axonal spheroidsG93.45 — Developmental and epileptic encephalopathyG93.49 — Other encephalopathy
Common synonyms
Other and unspecified encephalopathyOther and encephalopathy
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.