Tacrolimus by Immunoassay

Additional Information:

Patient samples may contain heterophilic antibodies that could react in immunoassays to give falsely elevated or depressed results. Antibodies to β-galactosidase can be encountered in samples as a consequence of bacterial infection and may produce falsely elevated results that may not be consistent with clinical evaluation.

CPT Code(s):


Specimen Requirements:

  • Container- Lavender top
  • Specimen Type- Whole blood
  • Minimum volume – 1 ml
  • Storage/stability – Refrigerated (2 – 8°C): 7 days
  • Epic order code: Lab2296


Tacrolimus is an immunosuppressive drug that is believed to prevent rejection in transplantation patients. Measurement of tacrolimus blood levels may be of use in monitoring patients receiving this drug.


Microgenics QMS immunoassay