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Z51.81

Encounter for therapeutic drug level monitoring

Billable

Code Hierarchy

Z51Z51.8Z51.81

Chapter: 21. Factors influencing health status and contact with health services

Section: Z40-Z53 - Encounters for other specific health care

Coding Guidelines

Excludes1 (Mutually Exclusive)

These codes should never be used together with Z51.81

  • Z02.83 - encounter for blood-drug test for administrative or medicolegal reasons (Z02.83)

Code Also

  • any long-term (current) drug therapy (Z79.-)

Related Codes

Z51.89Billable

Encounter for other specified aftercare

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