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ICD-10Z51.81 - Encounter for therapeutic drug level monitoring
Chapter 21
Section Z40-Z53
Z51.81
ICD-10Billable
Encounter for therapeutic drug level monitoring
Code also:
any long-term (current) drug therapy (Z79.-)
Specifically for this code:
encounter for blood-drug test for administrative or medicolegal reasons (Z02.83)
From Chapter 21:
Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
From Section Z40-Z53:
follow-up examination for medical surveillance after treatment (Z08-Z09)