Laboratory Services
Thyroid Cascade
Print this pageUpdated Test Information:
| Test Description |
Thyroid Cascade
|
|
|---|---|---|
| Synonym(s) |
Thyroid Function Cascade |
|
| Test ID |
TSHC
|
|
| General Information |
Thyroid-stimulating hormone (TSH) with reflex to FT4, T3, and/or thyroid peroxidase (anti-TPO) antibodies depending on the results. If reflex testing is performed, additional charges/CPT code(s) may apply. If TSH is <0.27 mIU/L, then free T4 (FT4) is performed. If FT4 is normal and the TSH is <0.1 mIU/L, then T3 is performed. If TSH is >4.2 mIU/L, then FT4 and thyroperoxidase antibodies are performed. |
|
| Specimen Type |
Serum |
|
| Specimen Requirements |
SST |
|
| Minimum Sample Volume |
0.5 |
|
| Stability |
8 days at 20-25 °C |
|
| Department (code) |
Chemistry |
|
| Methodology |
Electrochemiluminescence immunoassay (ECLIA) |
|
| Estimated TAT |
0-2 days |
|
| Testing Schedule |
Monday-Saturday |
|
| CPT Code(s) |
84443. If reflexed, additional charges will apply |
|
| Performing Lab |
Incyte Diagnostics |
