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ICD-10-CM · FY 2026 APRIL UPDATE

T43.63

Poisoning by, adverse effect of and underdosing of methylphenidate

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
T43.631Poisoning by methylphenidate, accidental (unintentional)Category
T43.631APoisoning by methylphenidate, accidental (unintentional), initial encounterBillable
T43.631DPoisoning by methylphenidate, accidental (unintentional), subsequent encounterBillable
T43.631SPoisoning by methylphenidate, accidental (unintentional), sequelaBillable
T43.632Poisoning by methylphenidate, intentional self-harmCategory
T43.632APoisoning by methylphenidate, intentional self-harm, initial encounterBillable
T43.632DPoisoning by methylphenidate, intentional self-harm, subsequent encounterBillable
T43.632SPoisoning by methylphenidate, intentional self-harm, sequelaBillable
T43.633Poisoning by methylphenidate, assaultCategory
T43.633APoisoning by methylphenidate, assault, initial encounterBillable
T43.633DPoisoning by methylphenidate, assault, subsequent encounterBillable
T43.633SPoisoning by methylphenidate, assault, sequelaBillable
T43.634Poisoning by methylphenidate, undeterminedCategory
T43.634APoisoning by methylphenidate, undetermined, initial encounterBillable
T43.634DPoisoning by methylphenidate, undetermined, subsequent encounterBillable
T43.634SPoisoning by methylphenidate, undetermined, sequelaBillable
T43.635Adverse effect of methylphenidateCategory
T43.635AAdverse effect of methylphenidate, initial encounterBillable
T43.635DAdverse effect of methylphenidate, subsequent encounterBillable
T43.635SAdverse effect of methylphenidate, sequelaBillable
T43.636Underdosing of methylphenidateCategory
T43.636AUnderdosing of methylphenidate, initial encounterBillable
T43.636DUnderdosing of methylphenidate, subsequent encounterBillable
T43.636SUnderdosing of methylphenidate, sequelaBillable

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.