Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  

TBG (THYROXINE BINDING GLOBULIN)

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB3162         Geisinger Epic ID: 17606

SPECIMEN COLLECTION
Specimen type:
Serum
Preferred collection container:
Specimen required:
1 mL aliquot of serum; minimum 0.5 mL.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge and immediately separate serum specimens from the cells into clean, plastic, screw-capped vial(s). 
Transport temperature:
Refrigerated.
Specimen stability:
Room temperature: 1 week. Refrigerated: 1 week. Frozen: 30 days.
Rejection criteria:
Stability limits exceeded.

TEST DETAILS
Reference interval:
Adult Ranges< br /> Females 13.5-30.9 mcg/mL
Males 12.7-25.1 mcg/mL

Pediatric Ranges mcg/mL
4-6 years 14.8-32.9 mcg/mL
7-8 years 16.3-30.7 mcg/mL
9-10 years 15.8-27.4 mcg/mL
11 years 15.5-27.4 mcg/mL
12 years 14.8-26.2 mcg/mL
13 years 13.8-25.2 mcg/mL
14 years 12.2-25.2 mcg/mL
15 years 10.8-23.8 mcg/mL
16 years 10.0-23.8 mcg/mL
17 years 8.5-23.1 mcg/mL

Tanner Stages Male Female
7-17 years mcg/mL mcg/mL
Tanner I 14.2-28.5 13.5-28.4
Tanner II 15.0-23.1 15.1-25.9
Tanner III 13.7-23.0 14.0-26.3
Tanner IV 12.0-22.8 13.2-25.0
Tanner V 9.1-22.8 12.2-23.7
To convert to nmol/L, multiply the result by 18.5.
CPT code(s):
84442
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:
Thyroxine binding globulin.
Methodology:
Chemiluminescence Immunoassay
Synonyms:
TBG, thyroid binding globulin
Quest test code 4352

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Monday-Friday evening    
Performed stat? No
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