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  6. 2026 ICD-10-CM Code Z91

2026 ICD-10-CM Diagnosis Code Z91

Personal risk factors, not elsewhere classified

ICD-10-CM Code:
Z91
ICD-10 Code for:
Personal risk factors, not elsewhere classified
Is Billable?
Not Valid for Submission
Code Navigator:

Z91 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of personal risk factors, not elsewhere classified. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Personal risk factors, not elsewhere classified

Non-specific codes like Z91 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for personal risk factors, not elsewhere classified:

  • 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

Code Classification

  • Factors influencing health status and contact with health services
    Z00–Z99
    • Persons with potential health hazards related to family and personal history and certain conditions influencing health status
      Z77-Z99
      • Personal risk factors, not elsewhere classified
        Z91

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • 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 History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.