T65.841A: Toxic effect of xylazine, accidental (unintentional), initial encounter

New code · FY2026

Billable: use this code on claims.

• New code, effective October 1, 2025 (FY2026).

Code breakdown

Coding notes

Inclusion terms (from T65.841)

• Toxic effect of xylazine NOS

Use additional code (from T65.84)

• 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.-)
• non-pressure chronic ulcer of skin, not elsewhere classified (L98.4-)

7th character (from T65)

• The appropriate 7th character is to be added to each code from category T65

7th characters (category T65)

• A initial encounter
• D subsequent encounter
• S sequela

Medicare coverage

T65.841A is listed as a covered diagnosis in 1 Medicare billing and coding article:

• A56612 Billing and Coding: CT of the Head

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All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.