Specimen Collection Manual and Test Catalog
TBG (THYROXINE BINDING GLOBULIN)
Geisinger Epic Procedure Code: LAB3162 Geisinger Epic ID: 17606SPECIMEN COLLECTION
Specimen type:
Serum
Preferred collection container:
Specimen required:
1 mL aliquot of serum; minimum 0.5 mL.
SPECIMEN PROCESSING
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:
CPT code(s):
84442 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.
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.
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:
Review Date:
11/21/2024 TBG, thyroid binding globulin, Quest test code 4352
Performing Locations