South · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Florida

This page explains the reverse t3 test – rt3 testing, what it measures, and how to order it. The Reverse T3 Test measures the level of reverse triiodothyronine in the blood to assess thyroid function under certain conditions.

Sample typeBlood draw at a collection lab

ReferralNo referral required

What this test is

The Reverse T3 Test is a blood test that evaluates the level of reverse triiodothyronine (rT3), a hormone related to thyroid function. It is often used to assess thyroid activity in the context of nonthyroidal illness syndrome.

What it measures

Reverse T3 — reflects the body's conversion of thyroxine (T4) to triiodothyronine (T3)

What the test involves

The test involves a standard blood draw, typically from a vein in the arm. The collected sample is then analyzed in a laboratory.

Why it is often ordered

Clinicians may order this test to investigate thyroid function when a patient has symptoms that suggest abnormal thyroid activity. It helps differentiate between thyroid disorders and other conditions affecting thyroid hormone levels.

Preparation

Preparation for the Reverse T3 Test may vary, so it is important to follow the specific instructions provided by the laboratory conducting the test.

How results are reported

Results of the Reverse T3 Test are reported as a concentration of rT3 in the blood. Reference ranges can vary between laboratories, so results should be interpreted in context.

Before you go

Sample collection method
Preparation instructions
Turnaround time

Cities

Reverse T3 Test – rT3 Testing in Florida communities

Choose your city for local context and to request this test.

Miami5,711,945Reverse T3 Test – rT3 Testing Tampa2,683,956Reverse T3 Test – rT3 Testing Orlando1,927,699Reverse T3 Test – rT3 Testing Jacksonville1,220,191Reverse T3 Test – rT3 Testing Sarasota727,388Reverse T3 Test – rT3 Testing Cape Coral682,773Reverse T3 Test – rT3 Testing Palm Bay528,322Reverse T3 Test – rT3 Testing Port St. Lucie468,979Reverse T3 Test – rT3 Testing Palm Coast403,834Reverse T3 Test – rT3 Testing Kissimmee399,929Reverse T3 Test – rT3 Testing Pensacola360,711Reverse T3 Test – rT3 Testing Bonita Springs347,581Reverse T3 Test – rT3 Testing Lakeland308,994Reverse T3 Test – rT3 Testing St. Petersburg258,245Reverse T3 Test – rT3 Testing Tallahassee257,648Reverse T3 Test – rT3 Testing Winter Haven240,768Reverse T3 Test – rT3 Testing Hialeah224,362Reverse T3 Test – rT3 Testing Navarre223,951Reverse T3 Test – rT3 Testing North Port221,616Reverse T3 Test – rT3 Testing Gainesville213,287Reverse T3 Test – rT3 Testing Deltona212,616Reverse T3 Test – rT3 Testing Fort Lauderdale182,247Reverse T3 Test – rT3 Testing Spring Hill179,668Reverse T3 Test – rT3 Testing Vero Beach South174,748Reverse T3 Test – rT3 Testing Ocala174,618Reverse T3 Test – rT3 Testing Pembroke Pines170,346Reverse T3 Test – rT3 Testing Leesburg154,301Reverse T3 Test – rT3 Testing Hollywood152,597Reverse T3 Test – rT3 Testing Panama City149,366Reverse T3 Test – rT3 Testing Miramar134,306Reverse T3 Test – rT3 Testing Coral Springs133,693Reverse T3 Test – rT3 Testing Lehigh Acres123,751Reverse T3 Test – rT3 Testing The Villages119,296Reverse T3 Test – rT3 Testing Clearwater116,616Reverse T3 Test – rT3 Testing West Palm Beach115,877Reverse T3 Test – rT3 Testing Brandon115,330Reverse T3 Test – rT3 Testing Miami Gardens111,706Reverse T3 Test – rT3 Testing Pompano Beach111,423Reverse T3 Test – rT3 Testing Davie104,782Reverse T3 Test – rT3 Testing Riverview98,928Reverse T3 Test – rT3 Testing Sunrise96,220Reverse T3 Test – rT3 Testing Boca Raton95,347Reverse T3 Test – rT3 Testing Plantation92,212Reverse T3 Test – rT3 Testing Alafaya92,080Reverse T3 Test – rT3 Testing Town 'n' Country89,679Reverse T3 Test – rT3 Testing Homosassa Springs86,578Reverse T3 Test – rT3 Testing Deerfield Beach86,062Reverse T3 Test – rT3 Testing Fort Myers84,694Reverse T3 Test – rT3 Testing Pine Hills84,289Reverse T3 Test – rT3 Testing Melbourne83,500Reverse T3 Test – rT3 Testing Miami Beach83,469Reverse T3 Test – rT3 Testing Largo82,505Reverse T3 Test – rT3 Testing Zephyrhills79,795Reverse T3 Test – rT3 Testing Boynton Beach79,479Reverse T3 Test – rT3 Testing Homestead78,885Reverse T3 Test – rT3 Testing St. Augustine78,386Reverse T3 Test – rT3 Testing Kendall78,007Reverse T3 Test – rT3 Testing Lauderhill73,935Reverse T3 Test – rT3 Testing Doral73,126Reverse T3 Test – rT3 Testing Tamarac71,140Reverse T3 Test – rT3 Testing