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ICD-10-CM Codes
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G00-G99
Diseases of the nervous system
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G89-G99
Other disorders of the nervous system
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G92-
Toxic encephalopathy
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2020 ICD-10-CM Diagnosis Code G92
Toxic encephalopathy
2016 2017 2018 2019 2020 Billable/Specific Code
- G92 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2020 edition of ICD-10-CM G92 became effective on October 1, 2019.
- This is the American ICD-10-CM version of G92 - other international versions of ICD-10 G92 may differ.
Applicable To- Toxic encephalitis
- Toxic metabolic encephalopathy
Code FirstCode First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
- , if applicable, drug induced (T36-T50
ICD-10-CM Range T36-T50
Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substancesCode First- , for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS (T88.7)
- aspirin gastritis (K29.-)
- blood disorders (D56-D76)
- contact dermatitis (L23-L25)
- dermatitis due to substances taken internally (L27.-)
- nephropathy (N14.0-N14.2)
Includes- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Note- The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
Type 1 Excludes- toxic reaction to local anesthesia in pregnancy (O29.3-)
Type 2 Excludes- abuse and dependence of psychoactive substances (F10-F19)
- abuse of non-dependence-producing substances (F55.-)
- drug reaction and poisoning affecting newborn (P00-P96)
- pathological drug intoxication (inebriation) (F10-F19)
Use Additional- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
- T36 Poisoning by, adverse effect of and unde...
- T37 Poisoning by, adverse effect of and unde...
- T38 Poisoning by, adverse effect of and unde...
- T39 Poisoning by, adverse effect of and unde...
- T40 Poisoning by, adverse effect of and unde...
- T41 Poisoning by, adverse effect of and unde...
- T42 Poisoning by, adverse effect of and unde...
- T43 Poisoning by, adverse effect of and unde...
- T44 Poisoning by, adverse effect of and unde...
- T45 Poisoning by, adverse effect of and unde...
- T46 Poisoning by, adverse effect of and unde...
- T47 Poisoning by, adverse effect of and unde...
- T48 Poisoning by, adverse effect of and unde...
- T49 Poisoning by, adverse effect of and unde...
- T50 Poisoning by, adverse effect of and unde...
- (T51-T65
ICD-10-CM Range T51-T65
Toxic effects of substances chiefly nonmedicinal as to sourceNote- When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.
Type 1 Excludes- contact with and (suspected) exposure to toxic substances (Z77.-)
Use Additional- code(s):
- for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
- personal history of foreign body fully removed (Z87.821)
- to identify any retained foreign body, if applicable (Z18.-)
- T51 Toxic effect of alcohol
- T52 Toxic effect of organic solvents
- T53 Toxic effect of halogen derivatives of a...
- T54 Toxic effect of corrosive substances
- T55 Toxic effect of soaps and detergents
- T56 Toxic effect of metals
- T57 Toxic effect of other inorganic substanc...
- T58 Toxic effect of carbon monoxide
- T59 Toxic effect of other gases, fumes and v...
- T60 Toxic effect of pesticides
- T61 Toxic effect of noxious substances eaten...
- T62 Toxic effect of other noxious substances...
- T63 Toxic effect of contact with venomous an...
- T64 Toxic effect of aflatoxin and other myco...
- T65 Toxic effect of other and unspecified su...
The following code(s) above
G92 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
G92:
- Inflammation of spinal cord due to toxin
- Toxic encephalitis
- Toxic encephalomyelitis
- Toxic myelitis
ICD-10-CM G92 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
- 023 Craniotomy with major device implant or acute complex cns pdx with mcc or chemotherapy implant or epilepsy with neurostimulator
- 024 Craniotomy with major device implant or acute complex cns pdx without mcc
- 091 Other disorders of nervous system with mcc
- 092 Other disorders of nervous system with cc
- 093 Other disorders of nervous system without cc/mcc
- 791 Prematurity with major problems
- 793 Full term neonate with major problems
Convert G92 to ICD-9-CM
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
Code annotations containing back-references to G92:
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Type 1 Excludes: G93.4
ICD-10-CM Diagnosis Code G93.4
Other and unspecified encephalopathy
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
Type 1 Excludes- alcoholic encephalopathy (G31.2)
- encephalopathy in diseases classified elsewhere (G94)
- hypertensive encephalopathy (I67.4)
- toxic (metabolic) encephalopathy (G92)
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Type 2 Excludes: G04, G04
ICD-10-CM Diagnosis Code G04
Encephalitis, myelitis and encephalomyelitis
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
Includes- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
Type 2 Excludes- acute transverse myelitis (G37.3-)
- alcoholic encephalopathy (G31.2)
- benign myalgic encephalomyelitis (G93.3)
- multiple sclerosis (G35)
- subacute necrotizing myelitis (G37.4)
- toxic encephalitis (G92)
- toxic encephalopathy (G92)
ICD-10-CM Diagnosis Code G04
Encephalitis, myelitis and encephalomyelitis
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
Includes- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
Type 2 Excludes- acute transverse myelitis (G37.3-)
- alcoholic encephalopathy (G31.2)
- benign myalgic encephalomyelitis (G93.3)
- multiple sclerosis (G35)
- subacute necrotizing myelitis (G37.4)
- toxic encephalitis (G92)
- toxic encephalopathy (G92)
- Bromidism, bromism G92
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
ICD-10-CM Diagnosis Code G04.90
Encephalitis and encephalomyelitis, unspecified
2016 2017 2018 2019 2020 Billable/Specific Code
Applicable To- Ventriculitis (cerebral) NOS
- Encephalopathy (acute) G93.40
ICD-10-CM Diagnosis Code G93.40
Encephalopathy, unspecified
2016 2017 2018 2019 2020 Billable/Specific Code
- due to
- drugs - G92 - see also Table of Drugs and Chemicals
- metabolic G93.41
ICD-10-CM Diagnosis Code G93.41
Metabolic encephalopathy
2016 2017 2018 2019 2020 Billable/Specific Code
- drug induced G92
- toxic G92
- toxic G92
- Jamaican
- neuropathy G92
- paraplegic tropical ataxic-spastic syndrome G92
- Leukoencephalopathy G93.49 - see also Encephalopathy
ICD-10-CM Diagnosis Code G93.49
Other encephalopathy
2016 2017 2018 2019 2020 Billable/Specific Code
- Meningoencephalitis G04.90 - see also Encephalitis
ICD-10-CM Diagnosis Code G04.90
Encephalitis and encephalomyelitis, unspecified
2016 2017 2018 2019 2020 Billable/Specific Code
Applicable To- Ventriculitis (cerebral) NOS
- Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) G04.91 - see also Encephalitis
ICD-10-CM Diagnosis Code G04.91
Myelitis, unspecified
2016 2017 2018 2019 2020 Billable/Specific Code
ICD-10-CM Codes Adjacent To G92
G90.8 Other disorders of autonomic nervous system
G90.9 Disorder of the autonomic nervous system, unspecified
G91.0 Communicating hydrocephalus
G91.1 Obstructive hydrocephalus
G91.2 (Idiopathic) normal pressure hydrocephalus
G91.3 Post-traumatic hydrocephalus, unspecified
G91.4 Hydrocephalus in diseases classified elsewhere
G91.8 Other hydrocephalus
G91.9 Hydrocephalus, unspecified
G92
Toxic encephalopathy
G93 Other disorders of brain
G93.1 Anoxic brain damage, not elsewhere classified
G93.2 Benign intracranial hypertension
G93.3 Postviral fatigue syndrome
G93.4 Other and unspecified encephalopathy
G93.40 Encephalopathy, unspecified
G93.41 Metabolic encephalopathy
G93.5 Compression of brain
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
