Test Code LAB0209551 T4

Additional Codes

EPIC Test Codes
LAB0209551	THYROXINE

Reporting Title

T4

Methodology

Competitive Binding Assay

Performing Laboratory

Rice Memorial Hospital

Specimen Requirements

Specimen Type: Plasma or Serum

Container/Tube:

Plasma: Lithium heparin, sodium heparin, plain or gel separator, or potassium EDTA

Serum: Clot, plain, activator or gel separator

Specimen Volume: 0.5 mL

Specimen Minimum Volume: 0.3 mL

Note: If testing will be delayed more than 24 hours, remove serum or plasma from the clot, serum separator or red blood cells.

Specimen Transport Temperature

Refrigerated (preferred) up to 6 days/Frozen up to 6 days

Day(s) Test Set Up

Monday through Sunday

CPT Coding

84436

Reference Ranges

Females:
0 up to 1 month	3.0-13.4 mcg/dL
1 month up to 1 year	4.6-13.4 mcg/dL
1 year up to 6 years	6.3-12.8 mcg/dL
6 years up to 11 years	5.3-10.8-mcg/dL
11 years up to 16 years	4.9-10.0 mcg/dL
16 years up to 18 years	5.1-10.0 mcg/dL
18 years and older	4.5-12.0 mgd/dL

Males:
0 up to 1 month	3.0-14.4 mcg/dL
1 month up to 1 year	5.3-16.3 mcg/dL
1 year up to 6 years	5.5-11.4 mcg/dL
6 years up to 11 years	5.4-10.6 mcg/dL
11 years up to 16 years	4.5-10.3 mcg/dL
16 years up to 18 years	4.9-8.8 mcg/dL
18 years and older	4.5-12.0 mcg/dL

Critical Value: <2.0 or >20.0 mcg/dL