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Test Code TACRO Tacrolimus (FK506), Blood

Additional Codes

Sunrise Clinical Manager (SCM) Orderable:  

Tacrolimus (FK506), Serum

AllScripts (AEHR) Orderable: 

Tacrolimus, Whole Blood

Performing Laboratory

Northwell Health Laboratories


Chemiluminescent Microparticle Immunoassay

Specimen Requirements

Container/Tube: Lavender-top (EDTA) tube(s)

Specimen Volume: 2 mL of whole blood

Transport Temperature: Room Temperature

Reference Values

Tacrolimus testing is performed on the Abbott Architect by chemiluminescent microparticle immunoassay. The therapeutic range of tacrolimus is not clearly defined but target 12-hour trough whole blood concentrations are 5.0-20.0 ng/mL early post transplant. Twenty-four hour trough concentrations are 33%-50% less than the corresponding 12-hour trough.

Test Classification and CPT Coding


Computer Interface Code

PDM # 5302635

Day(s) and Time(s) Performed

Monday through Sunday