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HelpEpic Code LAB127 T4 (Thyroxine), Free
Test Name Alias
Free T4 Level | FT4 | T4 free | Thyroxine | T4 | 6650
Interface Order Alias
10063
Collection Instructions
Specimen Collection: Blood
Container(s): 4.5 mL Mint Green Top (Lithium Heparin Gel) or 5.0 mL Gold Top (Serum Separator-SST Gel)
Preferred Volume to Collect: 4.5 mL
Minimum Volume to Collect: 1.0 mL
Neonate Volume to Collect: 0.5 mL
Capillary collect ok? Yes
Microtainer acceptable: Yes
Collection Instructions:
- After collection, gently invert tube 8-10 times.
- Specimen should be processed within 2 hours – See Processing Instructions.
Processing Instructions (Laboratory, Outpatient or Off-site collection)
Processed Specimen: Plasma or Serum
Centrifuge/Spin: Yes
Aliquot: Yes
Processing Instructions:
- Plasma is preferred specimen type
- Green Tube/Plasma: Centrifuge after collection.
- Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.
Transport Temperature: Refrigerate
Specimen Stability
Ambient: 8 hours
Refrigerate: 72 hours
Frozen: aliquot plasma/serum for longer storage
Laboratory Retention: 72 hours
Test Frequency
Available daily, usual TAT 1 day.
Reference Range
0 up to 3 days: 1.5 - 3.5 ng/dL
3 days up to 1 year: 0.9 - 2.0 ng/dL
1 year and up: 0.6 - 1.6 ng/dL
Performing Department
CHEMISTRY
Performing Department Laboratory Location
Spectrum Health Regional Laboratory, Grand Rapids, MI
Spectrum Health Big Rapids Laboratory, Big Rapids, MI
Spectrum Health Gerber Laboratory, Fremont, MI
Spectrum Health Kelsey Laboratory, Lakeview, MI
Spectrum Health Ludington Laboratory, Ludington, MI
Spectrum Health Pennock Laboratory, Hastings, MI
Spectrum Health Reed City Laboratory, Reed City, MI
Spectrum Health United Laboratory, Greenville, MI
Spectrum Health Zeeland Laboratory, Zeeland, MI
Methodology
Electrochemiluminescence Immunoassay (ECLIA)
CPT
84439-LAB-FREE T4
CDM Code
4056650
Epic Test ID
1230100705
LOINC
Free T4: 3024-7
Beaker LOINC
FREE THYROXINE: 3024-7
LIPEMIA INDEX, SERUM:
N/A
Mayo Access Code
SHO6650
Reviewed Date
3/5/2020
Beaker Names
Beaker Procedure Name: T4 FREE
Beaker Display Name: T4 (Thyroxine), Free, Blood
Level
BEAKER TEST NAME: T4
FREE
BEAKER TEST REPORT NAME: T4 Free
Beaker Synonyms
No synonym on file
Beaker Location, Container and Temperature
BW CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BW CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
BR CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BR CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
GM CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
GM CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
KL CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
KL CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
LH CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
LH CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
PH CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
PH CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
RC CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
RC CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
UN CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
UN CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated
ZH CHEMISTRY:
GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
ZH CHEMISTRY:
GOLD TOP
SST TUBE R
(Acceptable)-Refrigerated