Thyroid Panel with TSH
What it measures
- T3 UptakeLOINC 3050-2
- T4 (Thyroxine), TotalLOINC 3026-2
- Free T4 Index (T7)LOINC 32215-6
- TSHLOINC 3016-3
Before the visit
Specimen collection after fluorescein dye angiography should be delayed for at least 3 days. For patients on hemodialysis, specimen collection should be delayed for 2 weeks. According to the assay manufacturer Siemens: "Samples containing fluorescein can produce falsely depressed values when tested with the Advia Centaur TSH3 Ultra assay.".
Specimen
- Specimen
- 2 mL serum
- Minimum volume
- 1.2 mL
- Container
- Serum separator tube (SST)
- Temperature
- Room temperature
Billing
CPT 84436, 84443, 84479