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ICD-10-CM · FY 2026 APRIL UPDATE

T65

Toxic effect of other and unspecified substances

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T65.0Toxic effect of cyanidesCategory
T65.0XToxic effect of cyanidesCategory
T65.0X1Toxic effect of cyanides, accidental (unintentional)Category
T65.0X1AToxic effect of cyanides, accidental (unintentional), initial encounterBillable
T65.0X1DToxic effect of cyanides, accidental (unintentional), subsequent encounterBillable
T65.0X1SToxic effect of cyanides, accidental (unintentional), sequelaBillable
T65.0X2Toxic effect of cyanides, intentional self-harmCategory
T65.0X2AToxic effect of cyanides, intentional self-harm, initial encounterBillable
T65.0X2DToxic effect of cyanides, intentional self-harm, subsequent encounterBillable
T65.0X2SToxic effect of cyanides, intentional self-harm, sequelaBillable
T65.0X3Toxic effect of cyanides, assaultCategory
T65.0X3AToxic effect of cyanides, assault, initial encounterBillable
T65.0X3DToxic effect of cyanides, assault, subsequent encounterBillable
T65.0X3SToxic effect of cyanides, assault, sequelaBillable
T65.0X4Toxic effect of cyanides, undeterminedCategory
T65.0X4AToxic effect of cyanides, undetermined, initial encounterBillable
T65.0X4DToxic effect of cyanides, undetermined, subsequent encounterBillable
T65.0X4SToxic effect of cyanides, undetermined, sequelaBillable
T65.1Toxic effect of strychnine and its saltsCategory
T65.1XToxic effect of strychnine and its saltsCategory
T65.1X1Toxic effect of strychnine and its salts, accidental (unintentional)Category
T65.1X1AToxic effect of strychnine and its salts, accidental (unintentional), initial encounterBillable
T65.1X1DToxic effect of strychnine and its salts, accidental (unintentional), subsequent encounterBillable
T65.1X1SToxic effect of strychnine and its salts, accidental (unintentional), sequelaBillable
T65.1X2Toxic effect of strychnine and its salts, intentional self-harmCategory
T65.1X2AToxic effect of strychnine and its salts, intentional self-harm, initial encounterBillable
T65.1X2DToxic effect of strychnine and its salts, intentional self-harm, subsequent encounterBillable
T65.1X2SToxic effect of strychnine and its salts, intentional self-harm, sequelaBillable
T65.1X3Toxic effect of strychnine and its salts, assaultCategory
T65.1X3AToxic effect of strychnine and its salts, assault, initial encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.