2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Personal risk factors, not elsewhere classified
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z91: its own notes plus those printed at block Z77-Z99 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

  • 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 Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status applies to 567 codes
  • any follow-up examination (Z08-Z09)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z91Overview

What is the ICD-10 code for personal risk factors, not elsewhere classified?

Z91 is the ICD-10-CM category for personal risk factors, not elsewhere classified, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.