Thyroid Panel
0070141
Ordering Recommendation
Not recommended for routine thyroid screening.
Mnemonic
T7
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
Specimen Required
Patient Preparation
  
Collect
Serum separator tube or plasma 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 of cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month  
Reference Interval
                         
 
Test Number Components Reference Interval
 Thyroid Panel (T7) FTI 1.7-​4.2
0070135T3 Uptake 28-​41% uptake
0070140Thyroxine  
 
Cord blood 6.60-​17.50 µg/dL
0-​3 days 5.37-​22.40 µg/dL
4-​30 days 5.24-​23.20 µg/dL
1-​23 months 5.37-​16.00 µg/dL
2-​6 years 5.26-​14.80 µg/dL
7-​11 years 5.70-​14.10 µg/dL
12-​19 years 4.74-​14.60 µg/dL
20 years and older 5.10-​14.10 µg/dL
Interpretive Data
Thyroxine, Free (FT4) (0070138) is the preferred test alternative for T3 uptake and Free Thyroxine Index tests.  
Note
FTI  = Free Thyroxine Index
CPT Code(s)
84479; 84436
Components
Component Test Code*Component Chart Name
0070135T3 Uptake
0070140Thyroxine
0070196Free Thyroxine Index Calculation
* 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 Thyroxine Index
  • FT4 Index
  • FTI
  • T3 uptake
  • T7
  • thyroxine
  • Thyroxine Index