Z51.81 Encounter for therapeutic drug level monitoring
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Encounter for therapeutic drug level monitoring
Related codes
Z51.0Encounter for antineoplastic radiation therapy ICD-10-CMZ51.11Encounter for antineoplastic chemotherapy ICD-10-CMZ51.12Encounter for antineoplastic immunotherapy ICD-10-CMZ51.5Encounter for palliative care ICD-10-CMZ51.6Encounter for desensitization to allergens ICD-10-CMZ51.89Encounter for other specified aftercare ICD-10-CMZ51.AEncounter for sepsis aftercare ICD-10-CM
Common questions
Is Z51.81 a billable code?
Yes. Z51.81 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.