&lt;h2&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;OVERVIEW&lt;/strong&gt;&lt;/span&gt;&lt;/h2&gt;
&lt;p&gt;&lt;span style=&quot;font-size: 14px; color: #99ccff;&quot;&gt;The T4 (Thyroxine), Total and Free, Serum test is essential for evaluating thyroid function, particularly in cases where thyroid disorders are suspected. This test measures both total and free thyroxine levels in the blood, delivering comprehensive information regarding thyroid hormone status. Conducted using Electrochemiluminescence Immunoassay and reported as T4 (Thyroxine), Total and Free, this assay plays a crucial role in the diagnosis and management of thyroid conditions. Commonly referred to as T4, Serum or T4, Free, Serum, it provides valuable insights into thyroid function, enabling appropriate medical intervention.&lt;/span&gt;&lt;/p&gt;
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&lt;hr /&gt;
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&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;METHOD NAME&lt;/span&gt;&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Electrochemiluminescence Immunoassay&lt;/span&gt;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;br /&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;AVAILABILITY&lt;/span&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;REPORTING NAME&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
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&lt;div id=&quot;ReportingName-value&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;T4 (Thyroxine), Total and Free&lt;/span&gt;&lt;/div&gt;
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&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;br /&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;ALIASES&lt;/span&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
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&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;T4, Serum&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;T4, Free, Serum&lt;/span&gt;&lt;/p&gt;
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&lt;h3&gt;&amp;nbsp;&lt;/h3&gt;
&lt;h3 id=&quot;SpecimenType-title&quot;&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;SPECIMEN TYPE&lt;/strong&gt;&amp;nbsp;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&amp;nbsp;Serum&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;SHIPPING INSTRUCTIONS&lt;/span&gt;&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;SPECIMEN REQUIRED&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Preferred: &lt;/strong&gt;Serum gel&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Acceptable: &lt;/strong&gt;Red top&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Submission Container/Tube:&lt;/strong&gt; Plastic vial&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Specimen Volume: &lt;/strong&gt;1 mL&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Collection Instructions:&lt;/strong&gt; Centrifuge and aliquot serum into a plastic vial.&lt;/span&gt;&lt;/p&gt;

5-Hydroxyindoleacetic Acid, Plasma

5-Hydroxyindoleacetic Acid, Random, Urine