T4, FREE BY DIALYSIS
| Synonyms: | Thyroxine, Free by Dialysis; Free Thyroxine by Dialysis; Free T4 by Dialysis |
| Computer Code: | (RFTDE ) |
| Specimen Collection: | 4 mL blood (red or lavender top tube). Send to special chemistry immediately. |
| Minimum Volume: | 1 mL |
| Handling Instructions for Offsite Areas: | Serum: Allow to clot, centrifuge, remove serum, freeze. Plasma: centrifuge, remove plasma, freeze. Pediatric min. 0.4 mL serum or plasma. Separate within 1 hour of collection. Adult min. 0.5 mL serum or plasma. |
| Reference Values: | See reference laboratory report. |
| Lab Code: | Send Out |
| Requisition: | SPEC C |
| Test Frequency: | NA |
| Routine TAT: | 7 days |
| Stat TAT: | N/A |
| CPT Code(s): | 84439 |
| LCD or NCD: | |
| Methodology Used: |
See Addendum XVII |