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Triiodothyronine, Total (Total T3)
0070474
Ordering Recommendation

Not recommended for routine thyroid screening.

Mnemonic
T3 TOTAL
Methodology
Quantitative Electrochemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Plasma separator tube or serum separator tube. Also acceptable: Lavender (EDTA), pink (K2EDTA), or green (sodium or lithium heparin).  
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Grossly hemolyzed specimens.  
Remarks
 
Stability
After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month  
Reference Interval
Cord blood14-86 ng/dL
0-3 days96-292 ng/dL
4-30 days62-243 ng/dL
1-23 months81-281 ng/dL
2-6 years83-252 ng/dL
7-11 years92-219 ng/dL
12-19 years83-215 ng/dL
20 years and older80-200 ng/dL

Interpretive Data


Note
CPT Code(s)
84480
Components
Component Test Code*Component Chart NameLOINC
0070474Triiodothyronine, Total (Total T3)3053-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Free T3
  • FT3
  • T3 Total
  • Total T3