Z91.1 - Patient's noncompliance with medical treatment and regimen
Z91.13 - Patient's unintentional underdosing of medication regimen
codeFirst:
-underdosing of medication (T36-T50) with fifth or sixth character 6
Excludes 1:
-adverse effect of prescribed drug taken as directed- code to adverse effect
-poisoning (overdose) -code to poisoning
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