G93.4 – Other and unspecified encephalopathy

ICD-10-CM 2027 diagnosis code · Other disorders of the nervous system

Non-billable header

ICD-10-CM code G93.4

Code: G93.4 (claims format: G934)
Description: Other and unspecified encephalopathy
Billable: No – use a more specific code below
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

Billable codes under G93.4

G93.4 is a header code and cannot be used on claims. Choose the most specific code:

G93.40 – Encephalopathy, unspecifiedBillable
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

Notes for G93.4

Excludes2 (not included here):

alcoholic encephalopathy (G31.2)
encephalopathy in diseases classified elsewhere (G94)
hypertensive encephalopathy (I67.4)
toxic (metabolic) encephalopathy (G92.8)

Related codes in G93

G93.0 – Cerebral cystsBillable
G93.1 – Anoxic brain damage, not elsewhere classifiedBillable
G93.2 – Benign intracranial hypertensionBillable
G93.3 – Postviral and related fatigue syndromesHeader
G93.5 – Compression of brainBillable
G93.6 – Cerebral edemaBillable
G93.7 – Reye's syndromeBillable
G93.8 – Other specified disorders of brainHeader
G93.9 – Disorder of brain, unspecifiedBillable

Frequently asked questions

What is ICD-10 code G93.4?

G93.4 is the ICD-10-CM code for other and unspecified encephalopathy, in the block G89-G99 (Other disorders of the nervous system).

Is G93.4 a billable code?

No. G93.4 is a header code with more specific child codes; report one of the billable codes listed above.

What category does G93.4 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.