Z91.13 - Patient's unintentional underdosing of medication regimen

The ICD 10 Code for Patient's unintentional underdosing of medication regimen is listed as Z91.13.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field	Value
Diagnosis Code:	Z91.13
Description:	Patient's unintentional underdosing of medication regimen Code first underdosing of medication (T36-T50) with fifth or sixth character 6 Excludes1: adverse effect of prescribed drug taken as directed -code to adverse effect poisoning (overdose) -code to poisoning

Chapter	Factors influencing health status and contact with health services (Z00-Z99)
Block	Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
Parent	Z91.1 - Patient's noncompliance with medical treatment and regimen
ICD-10-CM Children (deeper level / typically more specific) of Z91.13:
Z91.130 - Patient's unintentional underdosing of medication regimen due to age-related debility
Z91.138 - Patient's unintentional underdosing of medication regimen for other reason
ICD-10-CM Siblings (same level / similar specificity) of Z91.13:
Z91.11 - Patient's noncompliance with dietary regimen
Z91.12 - Patient's intentional underdosing of medication regimen
Z91.14 - Patient's other noncompliance with medication regimen
Z91.15 - Patient's noncompliance with renal dialysis
Z91.19 - Patient's noncompliance with other medical treatment and regimen