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Test Code TacrBldSp Tacrolimus Level Blood Spot

Clinical System Name


Tacrolimus Level Blood Spot




Sample Requirements

Specimen: Capillary blood

Container(s): Dried blood spot card

Preferred Vol: 3 full circles

Minimum Vol:  1 full circle


Note: Draw 30 minutes to 1 hour before next dose. For line or peripheral collections, order Tacrolimus Level (not Blood Spot and collect in an EDTA tube. 


Processing Instructions

Reject due to

Spin: N

Aliquot: N

Temp: RT

Storage location: Store specimen and labels in the Biochemical Genetic box.


Off-site collection: Draw 30 minutes to 1 hour before next dose. Note draw time on the requisition. For capillary collection, spot 3 full circles on dried blood spot collection card, allow to air dry for 3 hours, and submit (or mail) to laboratory.  See instruction sheet for collection details below.


Temperature Time
Room temp 2 w
Refrigerated 2 w
Frozen 6 w



STAT Performed TAT
N M - F 1 - 3 d


Specimen must be received in the lab by 10:00 for next day results.

Performing Laboratory

Seattle Children's Laboratory    



Department:  Chemistry

Location: Chem West

Phone Number: (206)987-2617




Reference Range

5 - 17 ng/mL



Method: LC/MS/MS

Analytical Volume: 6 o8 mm diameter circle


CPT Codes