Non-Billable / Non-Specific Code
ICD-10-CM Z91 is the diagnosis code for Personal risk factors, not elsewhere classified. This code falls under the section "Persons with potential health hazards related to family and personal history and certain conditions influencing health status" within Chapter 21 â Factors influencing health status and contact with health services (Z00-Z99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in Z91. If the patient has both, code each condition separately:
Understanding where Z91 sits in the ICD-10-CM classification helps ensure proper coding:
No, Z91 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Z91 is the ICD-10-CM diagnosis code for "Personal risk factors, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
Z91 is located in Section Z77-Z99 â "Persons with potential health hazards related to family and personal history and certain conditions influencing health status" within Chapter 21 of the ICD-10-CM Tabular List.
Z91 has 7 sub-code(s) that provide more specific detail: Z91.0, Z91.1, Z91.4, Z91.5, Z91.8 and more.
Use Z91 when the patients documented diagnosis matches "Personal risk factors, not elsewhere classified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Personal risk factors, not elsewhere classified is Z91.
No, Z91 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Z91 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z91 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.