Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  

T3, FREE

ORDERING INFORMATION:
Sunquest Test Code:
FREET3      Geisinger Epic Procedure Code: 84481         Geisinger Epic ID: 7038

SPECIMEN COLLECTION
Specimen type:
Plasma or Serum
Preferred collection container:
Specimen required:
2 mL of serum or plasma; minimum 0.5 mL.

SPECIMEN PROCESSING
Specimen processing instructions:
Plasma: Centrifuge at 1100-2000 g for a minimum of 10 minutes.
Serum: Allow to clot. Centrifuge at 1100-2000 g for a minimum of 10 minutes. 
Transport temperature:
Refrigerated (preferred) or frozen.
Specimen stability:
Refrigerated: 7 days. Frozen: 1 month.
Rejection criteria:
Stability limits exceeded.

TEST DETAILS
Reference interval:
2.5 - 4.3 pg/mL
CPT code(s):
84481
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Free triiodothyronine.
Methodology:
Electrochemiluminescence
Synonyms:
Free T3, FT3
Free triiodothyronine
Clinical significance:
This test is used to diagnose hyperthyroidism and to clarify thyroid status in the presence of possible protein binding abnormality.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 11/05/2018

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Mariana Moyer, Jared Shepherd
Frequency: Daily
Performed stat? No
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