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Test Code Rev T3 UM T3, Reverse

Clinical System Name

Reverse T3


Reverse T3
T3 Reverse

Triiodothyronine Reverse

Sample Requirements

Specimen: Whole Blood

Container(s): Gold SST or Gold Microtainer or Red or Lavender/EDTA or Dark Green/Sodium Heparin

Preferred Vol: 1.0 mL

Minimum Vol: 0.6 mL



Processing Instructions

Reject due to: Serum not separated from the gel separator within 24 hours of collection.

Spin: Y

Aliquot: Y

Temp: -20 C

Storage location: Spin blood and transfer serum/plasma into a plastic aliquot tube. Store sample in CPA freezer Send Outs rack.


Off-site collection: Spin blood and transfer serum/plasma into a plastic aliquot tube. Transport room temperature.


Specimen Type Temperature Time
Serum or Plasma Room temp 7 d
  Refrigerated 7 d
  Frozen 30 d



STAT Performed TAT
N T - Sa 5 - 6 days


Performing Laboratory

Quest Diagnostics Nichols Institute

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042


Phone Number: (800) 642-4657


Department: Send Outs

Phone Number: (206) 987-2563

Reference Range

8 - 25 ng/dL


Method: Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Analytical Volume: 0.3 mL Serum or Plasma


CPT Codes


Send Out Instructions

Reference Test Name: T3 Reverse, LC/MS/MS
Reference Test Number: 90963
Instructions: Send out Monday - Friday with the Quest courier.