Alert

Effective Jan. 5, 2026: Temporary Age-Based Visitor Restrictions at UNC Health for all inpatient and waiting areas throughout its inpatient hospitals.

Read More

Clozapine (Clozaril), Serum

Includes Clozapine and Clozapine & Norclozapine

Tube Type

Test ID   LAB5611
EPIC Order
   CLOZAPINE LEVEL AND METABOLITE
CPT Code(s)   80159
Group/Individual Test   Group
Laboratory   Core Referral Testing
Tube Station   30
Specimen Routine: 4 mL blood/Red plain tube/Gold SST tube is NOT acceptable
  Micro: 1.8 mL blood
Availability Routine: Reference Laboratory - Mayo Clinic Laboratories
Turnaround Time   5-7 days
Reference Range Normal: See separate report
Comments For Outreach clients:  Spin specimen down, aliquot into Mayo tube, and send to the lab refrigerated OR send blood to Outreach Lab via STAT courier for lab to receive the specimen within 2 hours of collection.

Reviewed by J. Carr on October 31, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514