Z51.81✓ Billable
Encounter for therapeutic drug level monitoring
✗ Excludes 1(Not coded here)
- •encounter for blood-drug test for administrative or medicolegal reasons (Z02.83)
Code Hierarchy
┌21Factors influencing health status and contact with health services (Z00-Z99)├Z40-Z53Encounters for other specific health care (Z40-Z53)├Z51Encounter for other aftercare and medical care
└Z51.81Encounter for therapeutic drug level monitoring
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