Test Name: Tacrolimus
Health Link Test Code: HCTAC
LIS Test Code: TAC
CPT Code(s): 80197
Days Performed: Daily.
In-Lab Turnaround Time: 1 day.
Tacrolimus level should be determined on trough specimen collected just prior to administration of the next dose.
Collection Container: Lavender top
Collect specimen just before taking next dose.
Collection Volume: 4 mL
Pediatric Collection Volume: 0.5 mL
Sample Analyzed: Whole Blood
Do NOT centrifuge or separate plasma. SEND WHOLE BLOOD.
Transport specimen at ambient temperature to laboratory.
Definitive therapeutic concentration for Tacrolimus has not been established. A concentration of 5-15 ng/mL is generally considered to be therapeutic for individuals 18 years old and older. Test is performed by immunoassay on an Abbott Architect.
Interpretation Type: Interpretive Guidelines
Critical Calls: yes
The reportable range for tacrolimus is 2-60 ng/mL. Results of less than 2 ng/mL will be reported as less than 2 ng/mL.