T65.84Toxic effect of xylazine

T65.84 is the ICD-10-CM diagnosis code for toxic effect of xylazine. It belongs to category T65 (toxic effect of other and unspecified substances), block T51-T65 (toxic effects of substances chiefly nonmedicinal as to source) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within T65.8 (toxic effect of other specified substances), T65.84 is specifically for toxic effect of xylazine. Related codes cover latex (T65.81), harmful algae and algae toxins (T65.82), fiberglass (T65.83), medetomidine (T65.85) and other specified substances (T65.89).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

Use an additional code(s) for all associated manifestations, such as: cellulitis and acute lymphangitis (L03.-), cutaneous abscess, furuncle and carbuncle (L02.-), non-pressure chronic ulcer of lower limb, not elsewhere classified (L97.-) and non-pressure chronic ulcer of skin, not elsewhere classified (L98.4-).

It was added in FY2026, effective October 1, 2025.