ICD-10-CM
ICD-10 code for Hypersensitive, hypersensitiveness, hypersensitivity drug: T88.7
The ICD-10-CM index points "Hypersensitive, hypersensitiveness, hypersensitivity drug" to T88.7, Unspecified adverse effect of drug or medicament. T88.7 is not billable on its own. Add the 7th character for the encounter, for example T88.7XXA, Unspecified adverse effect of drug or medicament, initial encounter.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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