ICD-10-CM Book 2025 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 21 Z00-Z99 Factors influencing health status and contact with health services /
Z40-Z53 Encounters for other specific health care /
Z51 Encounter for other aftercare and medical care

  Billable ICD-10-CM Code Z51.81
Z51.81
Encounter for therapeutic drug level monitoring
codeAlso
any long-term (current) drug therapy (Z79.-)
excludes1
encounter for blood-drug test for administrative or medicolegal reasons (Z02.83)