ICD-10-CM Codes
G00-G99
G89-G99
G93-
2023 ICD-10-CM Diagnosis Code G93.4

2023 ICD-10-CM Diagnosis Code G93.4

Other and unspecified encephalopathy

2016

2017

2018

2019

2020

2021

2022

2023

Non-Billable/Non-Specific Code

G93.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2023 edition of ICD-10-CM G93.4 became effective on October 1, 2022.
This is the American ICD-10-CM version of G93.4 - other international versions of ICD-10 G93.4 may differ.

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G93.4. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

alcoholic encephalopathy (
ICD-10-CM Diagnosis Code G31.2
Degeneration of nervous system due to alcohol
Applicable To
- Alcoholic cerebellar ataxia
- Alcoholic cerebellar degeneration
- Alcoholic cerebral degeneration
- Alcoholic encephalopathy
- Dysfunction of the autonomic nervous system due to alcohol
Code Also
- associated alcoholism (F10.-)
G31.2
)
encephalopathy in diseases classified elsewhere (
ICD-10-CM Diagnosis Code G94
Other disorders of brain in diseases classified elsewhere
Code First
- underlying disease
Type 1 Excludes
- encephalopathy in congenital syphilis (A50.49)
- encephalopathy in influenza (J09.X9, J10.81, J11.81)
- encephalopathy in syphilis (A52.19)
- hydrocephalus in diseases classified elsewhere (G91.4)
G94
)
hypertensive encephalopathy (
ICD-10-CM Diagnosis Code I67.4
Hypertensive encephalopathy
Type 2 Excludes
- insufficiency, NOS, of precerebral arteries (G45.2)
I67.4
)

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (G93.4) and the excluded code together.

toxic (metabolic) encephalopathy (
ICD-10-CM Diagnosis Code G92.8
Other toxic encephalopathy
Applicable To
- Toxic encephalitis
- Toxic metabolic encephalopathy
Code First
- poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4 or 6)
Use Additional
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
G92.8
)

The following code(s) above G93.4 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to G93.4:

G00-G99
2023 ICD-10-CM Range G00-G99
Diseases of the nervous system
Type 2 Excludes
- 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)
Diseases of the nervous system

Clinical Information

A disorder characterized by a pathologic process involving the brain.
A disorder of the brain that can be caused by disease, injury, drugs, or chemicals.
A functional and/or structural disorder of the brain caused by diseases (e.g. Liver disease, kidney disease), medications, chemicals, and injuries.
Degenerative diseases of the brain.

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to G93.4:

Code Also: F78.A1

ICD-10-CM Diagnosis Code F78.A1
SYNGAP1-related intellectual disability
Code Also
- , if applicable, any associated:
- autism spectrum disorder (F84.0)
- autistic disorder (F84.0)
- encephalopathy (G93.4-)
- epilepsy and recurrent seizures (G40.-)
- other pervasive developmental disorders (F84.8)
- pervasive developmental disorder, NOS (F84.9)

ICD-10-CM Codes Adjacent To G93.4

G92.8 Other toxic encephalopathy

G92.9 Unspecified toxic encephalopathy

G93 Other disorders of brain

G93.0 Cerebral cysts

G93.1 Anoxic brain damage, not elsewhere classified

G93.2 Benign intracranial hypertension

G93.3 Postviral and related fatigue syndromes

G93.31 Postviral fatigue syndrome

G93.32 Myalgic encephalomyelitis/chronic fatigue syndrome

G93.39 Other post infection and related fatigue syndromes

G93.4 Other and unspecified encephalopathy

G93.40 Encephalopathy, unspecified

G93.41 Metabolic encephalopathy

G93.49 Other encephalopathy

G93.5 Compression of brain

G93.6 Cerebral edema

G93.7 Reye's syndrome

G93.8 Other specified disorders of brain

G93.81 Temporal sclerosis

G93.82 Brain death

G93.89 Other specified disorders of brain

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2023 ICD-10-CM Diagnosis Code G93.4

Other and unspecified encephalopathy

Degeneration of nervous system due to alcohol

Other disorders of brain in diseases classified elsewhere

Hypertensive encephalopathy

Other toxic encephalopathy

Diseases of the nervous system

SYNGAP1-related intellectual disability