Z91.A4Caregiver's other noncompliance with patient's medication regimen

Z91.A4 is the ICD-10-CM diagnosis code for Caregiver's other noncompliance with patient's medication regimen. 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 2 subcodes must be used instead.

Within Z91.A, choose Z91.A4 (other noncompliance with patient's medication regimen) only when documentation doesn't support a more specific option: noncompliance with patient's dietary regimen (Z91.A1), intentional underdosing of patient's medication regimen (Z91.A2), unintentional underdosing of patient's medication regimen (Z91.A3), noncompliance with patient's renal dialysis (Z91.A5) and noncompliance with patient's other medical treatment and regimen (Z91.A9).

To report this condition, pick the subcode that matches the documentation: Z91.A41 (due to financial hardship) and Z91.A48 (for other reason).

It was added in FY2023, effective October 1, 2022, and changed in FY2024.