T4
| Synonyms: | THYROXINE, TOTAL |
| Computer Code: | T4 |
| Specimen Collection: | 3 mL blood (light green top (Li Heparin) preferred. Red/gold acceptable). |
| Minimum Volume: | 1 mL |
| Handling Instructions for Offsite Areas: | If red or gold top, allow to clot. All tube types should be centrifuged for 20 minutes and refrigerated. Serum must be removed from red top tube. Min 0.5 mL serum/plasma. |
| Reference Values: | >18 yrs: 4.5-12.5 UG/DL |
| Lab Code: | Chemistry |
| Requisition: | SPEC C |
| Test Frequency: | Daily |
| Routine TAT: | 4 hrs |
| Stat TAT: | 60 min |
| CPT Code(s): | 84436 |
| LCD or NCD: | |
| Methodology Used: |
See Addendum XVII |