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Test Name: Thyroid Cascade Profile
Test Code: 330015
Other Names: N/A
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.
Specimen Requirements: Serum, 2 mL
Container: Red-top tube or gel-barrier tube
Collection Instructions: If a red-top tube is used, transfer separated serum to a plastic transport tube.
Stability: Refrigerate
Rejection Criteria / Special Instructions: Note: Special reflexing. If TSH is less than .450 it will reflex to Thyroxine (T4) Free, Direct and depending on the Thyroxine, (T4) Free, Direct result may reflex to a Tri-iodothyronine (T3), Free, both at an additional char
Methodology: Electrochemiluminescence Immunoassay (ECLIA)