2026 ICD-10-CM Diagnosis Code Z91Personal risk factors, not elsewhere classified

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z91

ICD-10-CM Z91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z91 is a non-billable ICD-10-CM category code for personal risk factors, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z91.010, Z91.0110, Z91.0111, and Z91.0112.

Code Identity

ICD-10-CM Code
Z91
Billable Status
No — Non-Billable Category
Code Describes
Personal risk factors, not elsewhere classified
Chapter
Z77-Z99
Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ91Personal risk factors, not elsewhere classified
This CodeZ91Personal risk factors, not elsewhere classified

Specific Coding for Personal risk factors, not elsewhere classifiedOverview

Non-specific codes like Z91 require more characters. Use one of these billable codes instead:

  • Z91.0 for Allergy status, other than to drugs and biological substances

  • Z91.01 for Food allergy status

  • Use Z91.02 for Food additives allergy status

  • Z91.03 for Insect allergy status

  • Z91.04 for Nonmedicinal substance allergy status

  • Use Z91.09 for Other allergy status, other than to drugs and biological substances

  • Z91.1 for Patient's noncompliance with medical treatment and regimen

  • Z91.11 for Patient's noncompliance with dietary regimen

  • Z91.12 for Patient's intentional underdosing of medication regimen

  • Z91.13 for Patient's unintentional underdosing of medication regimen

  • Z91.14 for Patient's other noncompliance with medication regimen

  • Z91.15 for Patient's noncompliance with renal dialysis

  • Z91.19 for Patient's noncompliance with other medical treatment and regimen

  • Z91.4 for Personal history of psychological trauma, not elsewhere classified

  • Z91.41 for Personal history of adult abuse

  • Use Z91.42 for Personal history of forced labor or sexual exploitation

  • Use Z91.49 for Other personal history of psychological trauma, not elsewhere classified

  • Z91.5 for Personal history of self-harm

  • Use Z91.51 for Personal history of suicidal behavior

  • Use Z91.52 for Personal history of nonsuicidal self-harm

  • Z91.8 for Other specified personal risk factors, not elsewhere classified

  • Use Z91.81 for History of falling

  • Use Z91.82 for Personal history of military deployment

  • Use Z91.83 for Wandering in diseases classified elsewhere

  • Z91.84 for Oral health risk factors

  • Use Z91.85 for Personal history of military service

  • Use Z91.89 for Other specified personal risk factors, not elsewhere classified

  • Z91.A for Caregiver's noncompliance with patient's medical treatment and regimen

  • Z91.A1 for Caregiver's noncompliance with patient's dietary regimen

  • Z91.A2 for Caregiver's intentional underdosing of patient's medication regimen

  • Use Z91.A3 for Caregiver's unintentional underdosing of patient's medication regimen

  • Z91.A4 for Caregiver's other noncompliance with patient's medication regimen

  • Z91.A5 for Caregiver's noncompliance with patient's renal dialysis

  • Z91.A9 for Caregiver's noncompliance with patient's other medical treatment and regimen

  • Use Z91.B for Personal risk factor of exposure to diethylstilbestrol

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • contact with and suspected exposures hazardous to health Z77
  • exposure to pollution and other problems related to physical environment Z77.1
  • female genital mutilation status N90.81
  • occupational exposure to risk factors Z57
  • personal history of physical injury and trauma Z87.81 Z87.82

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z91Overview

Is Z91 (Personal risk factors, not elsewhere classified) a billable code?

No. This is a category header that groups the codes for personal risk factors, not elsewhere classified, and headers cannot be submitted on claims. Claims for personal risk factors, not elsewhere classified need a more specific code from this category, such as Z91.010, Z91.0110, and Z91.0111.