At LabCorp, Triiodothyronine (T3), Free is drawn in a Red-top tube, gel-barrier tube or green-top (lithium heparin) tube, order code 010389.

LabCorp collection requirements

Triiodothyronine (T3), Free tube and order code at LabCorp

Primary tube

Red-top tube, gel-barrier tube or green-top (lithium heparin) tube

Order code

010389

Minimum volume

0.7 mL (Note: This volume does not allow for repeat testing.)