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Test Code THCAS THYROID CASCADE

Important Note

The Thyroid cascade is a reflex test where the reflex is part of the order and there is no option to decline the testing. TSH is done first. If the TSH is outside normal range a Free-T4 is ordered automatically (CPT: 84439). If the TSH is low and the Free-T4 is normal based on the appropriate reference range for the age/sex of the patient a Total -T3 is ordered (CPT: 84480).

Test subject to Medicare National Coverage Determination (NCD) 190.22 - Thyroid Testing.

Test is designed for ambulatory adults only.

Additional Codes

Primary ID

Epic Code

Mayo Access ID

THCAS

LAB2103 FAH5791

 

Specimen Information

Container

Specimen

Temperature

Collect Vol

Submit Vol

Minimum Vol

Stability
Serum Separator Tube Serum Refrigerate 4 mL 1 mL 0.6 mL 7 days

 

Test Schedule / Analytical Time / Test Priority

Daily / 1 day / Available STAT

Method

See individual tests

CPT(s)

See individual tests

Instrumentation

Ortho Vitros 5600

Reference Range

See Individual Tests

Section

Chemistry-1

Performing Location

University of Vermont Medical Center

Is the UVMMC lab NY State Certified to perform this testing?  Yes/No

Yes

LOINC Code Information

Result Code Reporting Name LOINC Code
TSH3 TSH 3016-3