Z91.8Other specified personal risk factors, not elsewhere classified

Z91.8 is the ICD-10-CM diagnosis code for other specified personal risk factors, not elsewhere classified. It belongs to category Z91 (personal risk factors, not elsewhere classified), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within Z91, choose Z91.8 (Other specified personal risk factors, not elsewhere classified) only when documentation doesn't support a more specific option: allergy status, other than to drugs and biological substances (Z91.0), patient's noncompliance with medical treatment and regimen (Z91.1), personal history of psychological trauma, not elsewhere classified (Z91.4), personal history of self-harm (Z91.5), Caregiver's noncompliance with patient's medical treatment and regimen (Z91.A) and personal risk factor of exposure to diethylstilbestrol (Z91.B).

To report this condition, pick the subcode that matches the documentation: Z91.81 (falling), Z91.82 (deployment), Z91.83 (elsewhere), Z91.84 (factors), Z91.85 (service) and Z91.89 (classified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.