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ICD-10-CM diagnosis code

T56.5X2A Toxic effect of zinc and its compounds, intentional self-harm, initial encounter

Billable
Yes, a complete code (FY2026)
Category
T56 Toxic effect of metals
Chapter
19. Injury, poisoning and certain other consequences of external causes

Encounter (7th character)

This code is for the initial encounter: the patient is receiving active treatment for the condition (for example surgery, an emergency department visit or evaluation by a new clinician).

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Other codes in T56

144 complete codes in this category.

All 144 codes in T56 →

Documentation tips

  • Make sure the note supports every element of the title, “Toxic effect of zinc and its compounds, intentional self-harm, initial encounter”: each detail in it should be traceable to the history, examination or assessment.
  • Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
  • Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to T56.

The international WHO ICD-10 also has T56, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.

ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.

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