| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
T4 (Thyroxine), Total Only, Serum or Plasma
Test CodeT4 - NCMC
CPT Codes
84436
Preferred Specimen
1 mL serum from SST
Minimum Volume
0.5 mL
Other Acceptable Specimens
1 mL plasma from Green top (Lithium Heparin) or 1 mL serum from Red Top
Specimen Stability
| Temperature | Time |
| Ambient | 4 days |
| Refrigerated | 5 days |
| Refrigerated | 7 days |
*Centrifuge and aliquot into a plastic vial.
Methodology
Chemiluminescence Immunoassay
Setup Schedule
Monday through Sunday; Continuously
Report Available
Same day
Reference Range
| Age | Male | Female |
| 0-4 years | 5.9-13.1 ug/dL | 5.9-13.1 ug/dL |
| 4-14 years | 5.4-10.1 ug/dL | 5.4-10.1 ug/dL |
| 14-19 years | 5.3-9.2 ug/dL | 5.8-11.0 ug/dL |
| 19-150 years | 4.5-11.7 ug/dL | 4.5-11.7 ug/dL |
Performing Laboratory
North Colorado Medical Center Laboratory
