TSH with reflex to free T4

Alphabetical Test listing

TSH with reflex to free T4-8960

  
TSH with reflex to free T4
  
8960
  
LAB8960
  
TSR
  
Thyroid stimulating hormone
Thyrotropin
Thyrotropic hormone
  

Any TSH value of <0.35 or >4.94 µIU/mL will automatically reflex to a Free T4

  

This reflex test was established on the recommendation of the Clinical Practice Council to be the preferred first lab test ordered in the screening for thyroid disease.

Any TSH value of <0.35 or >4.94 µIU/mL will automatically reflex to a Free T4.  Providers also have the ability to order each of these tests (TSH and FT4) individually.

 

  
Lithium heparin (Li hep) plasma
  
  
2.0 mL
  
0.2 mL
  

Spin

  

Lt green plasma separator (PST)

  
Serum
  
  

Gold serum separator (SST) tube

  

Refrigerated (preferred) - 7 days

Frozen - 6 months

  
AHL - Chemistry: C
  
Daily
  
1 day
  

Electrochemiluminescence immunoassay (ECLIA)

  

1 month:   0.43 - 16.10 µIU/mL
2 years:    0.62 - 8.05 µIU/mL
2 - 6 yrs:   0.54 - 4.53 µIU/mL
7 - 12 yrs: 0.66 - 4.14 µIU/mL
Adult:        0.35 - 4.94 µIU/mL

  
84443
84439 (if appropriate)
  
Yes
  
  
06/10/2013
  
09/11/2018
  
02/17/2020