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South · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Tennessee

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 Tennessee communities

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

Nashville1,098,486Reverse T3 Test – rT3 TestingMemphis1,034,498Reverse T3 Test – rT3 TestingKnoxville619,925Reverse T3 Test – rT3 TestingChattanooga403,233Reverse T3 Test – rT3 TestingClarksville198,689Reverse T3 Test – rT3 TestingMurfreesboro181,450Reverse T3 Test – rT3 TestingJohnson City131,902Reverse T3 Test – rT3 TestingKingsport98,767Reverse T3 Test – rT3 TestingFranklin81,531Reverse T3 Test – rT3 TestingCleveland72,589Reverse T3 Test – rT3 TestingJackson71,983Reverse T3 Test – rT3 TestingBristol69,734Reverse T3 Test – rT3 TestingHendersonville60,628Reverse T3 Test – rT3 TestingBartlett57,639Reverse T3 Test – rT3 TestingSmyrna52,401Reverse T3 Test – rT3 TestingCollierville50,669Reverse T3 Test – rT3 TestingSpring Hill48,403Reverse T3 Test – rT3 TestingBrentwood44,354Reverse T3 Test – rT3 TestingGallatin43,306Reverse T3 Test – rT3 TestingColumbia40,957Reverse T3 Test – rT3 TestingGermantown40,955Reverse T3 Test – rT3 TestingLa Vergne38,127Reverse T3 Test – rT3 TestingMount Juliet38,059Reverse T3 Test – rT3 TestingLebanon37,471Reverse T3 Test – rT3 TestingCookeville34,068Reverse T3 Test – rT3 TestingMaryville31,281Reverse T3 Test – rT3 TestingOak Ridge31,087Reverse T3 Test – rT3 TestingMorristown30,387Reverse T3 Test – rT3 TestingFarragut23,388Reverse T3 Test – rT3 TestingShelbyville23,005Reverse T3 Test – rT3 TestingEast Ridge21,967Reverse T3 Test – rT3 TestingTullahoma20,599Reverse T3 Test – rT3 TestingSpringfield18,561Reverse T3 Test – rT3 TestingSevierville18,038Reverse T3 Test – rT3 TestingGoodlettsville17,522Reverse T3 Test – rT3 TestingDyersburg16,235Reverse T3 Test – rT3 TestingDickson15,855Reverse T3 Test – rT3 TestingSeymour15,633Reverse T3 Test – rT3 TestingGreeneville15,361Reverse T3 Test – rT3 TestingArlington14,158Reverse T3 Test – rT3 TestingElizabethton14,112Reverse T3 Test – rT3 TestingAthens13,961Reverse T3 Test – rT3 TestingPowell13,855Reverse T3 Test – rT3 TestingMcMinnville13,699Reverse T3 Test – rT3 TestingLakeland13,693Reverse T3 Test – rT3 TestingNolensville13,393Reverse T3 Test – rT3 TestingSoddy-Daisy13,090Reverse T3 Test – rT3 TestingPortland13,031Reverse T3 Test – rT3 TestingWhite House12,820Reverse T3 Test – rT3 TestingLewisburg12,131Reverse T3 Test – rT3 TestingManchester11,956Reverse T3 Test – rT3 TestingCrossville11,892Reverse T3 Test – rT3 TestingRed Bank11,855Reverse T3 Test – rT3 TestingMiddle Valley11,569Reverse T3 Test – rT3 TestingHartsville11,463Reverse T3 Test – rT3 TestingLawrenceburg11,460Reverse T3 Test – rT3 TestingUnion City11,119Reverse T3 Test – rT3 TestingCollegedale10,973Reverse T3 Test – rT3 TestingAlcoa10,777Reverse T3 Test – rT3 TestingMillington10,583Reverse T3 Test – rT3 Testing