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Web:	mayocliniclabs.com
Email:	mcl@mayo.edu
Telephone:	800-533-1710
International:	+1 855-379-3115
Values are valid only on day of printing.

Test ID: FRT3
T3 (Triiodothyronine), Free, Serum

Overview
Specimen
Clinical & Interpretive
Performance
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Useful For Suggests clinical disorders or settings where the test may be helpful

Free triiodothyronine (T3) is a second- or third-level test of thyroid function; it provides further confirmation of hyperthyroidism, supplementing the tetraiodothyronine (T4), sensitive thyrotropin (sTSH), and total T3 assays

Evaluating clinically euthyroid patients who have an altered distribution of binding proteins

Monitoring thyroid hormone replacement therapy

Method Name A short description of the method used to perform the test

Immunoenzymatic Assay

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.

Yes

Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

T3 (Triiodothyronine), Free, S

Aliases Lists additional common names for a test, as an aid in searching

Free T3 (Triiodothyronine)
FT3 (Free Triiodothyronine)
T3 (Triiodothyronine), Free, Serum
Triiodothyronine, Free
Free T3 Only, Serum

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• Custom Gene Ordering Tool

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Test ID: FRT3
T3 (Triiodothyronine), Free, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Method Name A short description of the method used to perform the test

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.

Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Aliases Lists additional common names for a test, as an aid in searching

Test Catalog

Test Name

Ordering and Results Order Assistance • Order a Test • Prior Authorization • Add Tests to an Order • Custom Gene Ordering Tool References • Critical Values and Results • Test Performance Policies MayoACCESS • Application • Resources MayoLINK • Application •Resources

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Test ID: FRT3 T3 (Triiodothyronine), Free, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Method Name A short description of the method used to perform the test

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.

Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Aliases Lists additional common names for a test, as an aid in searching

Ordering and Results

Order Assistance

• Order a Test
• Prior Authorization
• Add Tests to an Order
• Custom Gene Ordering Tool

References

• Critical Values and Results
• Test Performance Policies

MayoACCESS

• Application
• Resources

MayoLINK

• Application
•Resources

Utilization Management

Publications and Tools

• Algorithms
• Hot Topics
• Communiqué
• A Test in Focus
•Resource Center

Test ID: FRT3
T3 (Triiodothyronine), Free, Serum