Thyroid-Stimulating Hormone (TSH) Cascade, Serum*

Important Note

*This test is orderable in Cerner as Thyroid Cascade

Specimen Type: Blood
Container/Tube:

Preferred: Light-green top (lithium heparin gel)

Specimen Fill Volume: Full tube

Collection Instructions:

1. Send specimen in original tube.

2. If there is a delay in transport of >1 hour, centrifuge tube.

If TSH is high or low reflex to Free T4

If TSH is <0.1 with normal or low Free T4 reflex to Total T3

Rutland Regional Medical Center Laboratory

Refrigerated

See individual test listings.

Daily

Analytical Time:

1 day

Available Stat

CPT: 84443

LOINC: 3016-3

Order Code: RMCTHYCASC

Result Code: RMCL800395

Result Name: TSH

84439-T4, free (if appropriate)

84480-T3, total (if appropriate)

Roche Cobas