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U.S. ICD-10-CM · FY 2027

Z91 ICD-10-CM Code: Personal risk factors, not elsewhere classified

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

Z91

Personal risk factors, not elsewhere classified

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where Z91 sits

  1. 1

    Chapter 21

    Factors influencing health status and contact with health services (Z00-Z99)

  2. 2

    Section

    Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

  3. 3

    Category Z91

    Personal risk factors, not elsewhere classified

  4. 4

    Code Z91

    Personal risk factors, not elsewhere classified

More specific choices

Codes under Z91

Z91 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Z91.0

Allergy status, other than to drugs and biological substances

Z91.1

Patient's noncompliance with medical treatment and regimen

Z91.4

Personal history of psychological trauma, not elsewhere classified

Z91.5

Personal history of self-harm

Z91.8

Other specified personal risk factors, not elsewhere classified

Z91.A

Caregiver's noncompliance with patient's medical treatment and regimen

Z91.B

Personal risk factor of exposure to diethylstilbestrol

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for Z91.

Code first

No “code first” instruction is listed for Z91.

Use additional code

No “use additional code” instruction is listed for Z91.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for Z91.

Excludes2

Conditions not included here that may be reported separately when present.

  • 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-)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code Z91 mean?

Z91 is the FY 2027 U.S. ICD-10-CM code for “Personal risk factors, not elsewhere classified.”

Is Z91 a billable or specific ICD-10-CM code?

No. Z91 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is Z91 located in ICD-10-CM?

Z91 is listed in Chapter 21, Factors influencing health status and contact with health services (Z00-Z99), within Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) (Z77–Z99), under category Z91, Personal risk factors, not elsewhere classified.

What coding notes are listed for Z91?

No inclusion terms are listed for Z91 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: 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-).

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