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Thyroid Cascade Panel

Order Code CH014
Turnaround Time 24 hours
Test Includes

Thyroid-stimulating hormone (TSH) with automatic reflex (as diagnostically warranted) to free thyroxine, free triiodothyronine, and/or thyroid peroxidase (TPO) antibodies. If reflex testing is performed, additional charges/CPT code(s) may apply.

Special reflexing: If TSH is 4.500, it will reflex to thyroxine (T4), free, direct and depending on the thyroxine (T4), free, direct result, may reflex to a thyroid peroxidase (TPO) antibody, both at an additional charge.

Specimen Requirements
Specimen Source
Serum, Plasma
Transport Container
(Specimen Container)

SST (Tiger Top)/ Lithium Heparin/ Sodium Heparin

Preferred Specimens
Minimum Volume (uL)
.5 mL
Collection Instructions
(Transport Temperature)
Transport Refrigerated (cold packs)
Specimen Stability
Temperature Period
Room temperature Unacceptable
Refrigerated 7 days
Frozen If testing will be delayed more than 6 days, specimens should be frozen at -10°C or colder
Test Details
See Individual Tests
Clinical Significance

The Thyroid Cascade Panel is a panel that will act as an aid to physicians in the diagnosis of common adult thyroid disorders. The initial results of a TSH will determine further reflex orders of T4, Free, TPO Antibodies and T3, Free orders and provided an interpretation based upon the results of the reflexed tests.

Reference Ranges

See Individual Tests