ICD-10-CM > Z00-Z99 > Z77-Z99 > Z91 > Z91.A > Z91.A4 Z91.A4 Caregiver's other noncompliance with patient's medication regimen Non-Billable/Non-Specific Applicable To Caregiver's underdosing of patient's medication NOSCaregiver's underdosing with patient's medication NOS Codes Z91.A41Caregiver's other noncompliance with patient's medication regimen due to financial hardshipZ91.A48Caregiver's other noncompliance with patient's medication regimen for other reason