Z91.51 — Personal history of suicidal behavior

Z91.51

ICD-10 Chapter 21: Factors Influencing Health Status — illustrative image — Chapter 21: Factors influencing health status and contact with health services (Z00–Z99) — illustrative image

What this code means

A personal history of suicidal behaviour (self-harm), relevant to mental-health risk assessment.

Also called: history of self-harm, personal history of suicidal behavior.

When this code is used

Used for personal history of suicidal behavior.

Where it sits in ICD-10-CM

Code Z91.51 belongs to Chapter 21: Factors influencing health status and contact with health services, which covers codes Z00–Z99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Frequently asked questions

What is ICD-10-CM code Z91.51?

Z91.51 is the ICD-10-CM diagnosis code for “Personal history of suicidal behavior”. A personal history of suicidal behaviour (self-harm), relevant to mental-health risk assessment.

When is code Z91.51 used?

Used for personal history of suicidal behavior. It belongs to Chapter 21 of ICD-10-CM (Factors influencing health status and contact with health services).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.