All ICD10 Codes
Z91Not billable, use a more specific code below

Personal risk factors, not elsewhere classified

In Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99), chapter 21: Factors Influencing Health Status and Contact with Health Services

62 billable codes under Z91: none are a CC or MCC; none map to an HCC.

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Instructional notes

Excludes2: not included here, code separately if applicable

  • 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-)

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

These notes sit on Z77-Z99 and apply to every code under it, including Z91.

Code also: add a code for this too, order depends on the encounter

  • any follow-up examination (Z08-Z09)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers when and how to use Z codes (Z00-Z99) for encounters and supplementary information, including contact, status, history, screening, aftercare, exams, and social determinants of health.

Read Section I.C.21 (page 92)

All codes under Z91

Z91 can't be used on a claim. Pick a billable code below; grey headings group them.

Z91 MS-DRG

As the principal diagnosis, all 62 billable codes under Z91 group to MS-DRG 951 (v44.0).

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.