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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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Toxic encephalopathy G92- >
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...
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