Z91
⚠ Non-billable
Personal risk factors, not elsewhere classified
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z91
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes2 — not included here, but may code together
- 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-)
Frequently asked questions
What is ICD-10 code Z91?
ICD-10-CM code Z91 represents Personal risk factors, not elsewhere classified. It is a non-billable header code requiring a more specific subcategory in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z91 billable?
No. Z91 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Z91 in?
Z91 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z91 category
Z91.0
Allergy status, other than to drugs and biological substances
Non-billable
Z91.1
Patient's noncompliance with medical treatment and regimen
Non-billable
Z91.4
Personal history of psychological trauma, not elsewhere classified
Non-billable
Z91.01
Food allergy status
Non-billable
Z91.02
Food additives allergy status
Billable
Z91.03
Insect allergy status
Non-billable
Z91.04
Nonmedicinal substance allergy status
Non-billable
Z91.09
Other allergy status, other than to drugs and biological substances
Billable
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