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Lab Test Dictionary

Dabigatran with Reflex to Thrombin Time (91115)


Clotting Assay



Specimen Type


Performing Lab

Quest Diagnostics Chantilly

Epic ID

Other Reference Test

Lab Test Days

Tuesday, Thursday, Saturday

Standard TAT

1-4 Days

Collection Information

Specimen Required

(one) 1.8 mL or (one) 2.7 mL Blood

Container Type

Light Blue (Sodium Citrate)

Collection Instructions

Collect 90-120 minutes after the last dose (preferably after at least 3 doses).

Processing Information - Lab Use Only

Transport Temperature

On Ice

Specimen Stability

Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 30 Days

Rejection Criteria

Gross hemolysis; Visible fibrin clot; Received room temp; Received refrigerated

Test Volume Required

1 mL Platelet-Poor Plasma

Minimum Test Volume

0.5 mL Platelet-Poor Plasma

Processing Instructions

Platelet-Poor Plasma: Centrifuge (light blue-top) tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the wbc/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/uL). Freeze immediately and send frozen.

CPT Codes