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New England · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Connecticut

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 Connecticut communities

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

Bridgeport975,078Reverse T3 Test – rT3 TestingHartford907,046Reverse T3 Test – rT3 TestingNew Haven587,648Reverse T3 Test – rT3 TestingNorwich201,726Reverse T3 Test – rT3 TestingWaterbury199,552Reverse T3 Test – rT3 TestingDanbury177,722Reverse T3 Test – rT3 TestingStamford134,820Reverse T3 Test – rT3 TestingNorwalk90,821Reverse T3 Test – rT3 TestingNew Britain74,022Reverse T3 Test – rT3 TestingMeriden60,790Reverse T3 Test – rT3 TestingBristol60,733Reverse T3 Test – rT3 TestingWest Haven55,518Reverse T3 Test – rT3 TestingMilford city 50,694Reverse T3 Test – rT3 TestingMiddletown47,164Reverse T3 Test – rT3 TestingShelton40,944Reverse T3 Test – rT3 TestingTorrington35,447Reverse T3 Test – rT3 TestingNaugatuck31,586Reverse T3 Test – rT3 TestingNew London27,585Reverse T3 Test – rT3 TestingWallingford Center19,211Reverse T3 Test – rT3 TestingAnsonia18,945Reverse T3 Test – rT3 TestingWillimantic18,150Reverse T3 Test – rT3 TestingStorrs16,784Reverse T3 Test – rT3 TestingDerby12,387Reverse T3 Test – rT3 TestingTrumbull Center10,468Reverse T3 Test – rT3 TestingKensington9,626Reverse T3 Test – rT3 TestingOakville9,507Reverse T3 Test – rT3 TestingConning Towers Nautilus Park9,479Reverse T3 Test – rT3 TestingSandy Hook9,406Reverse T3 Test – rT3 TestingRiverside9,133Reverse T3 Test – rT3 TestingLong Hill8,307Reverse T3 Test – rT3 TestingGlastonbury Center8,187Reverse T3 Test – rT3 TestingThompsonville8,134Reverse T3 Test – rT3 TestingSouthwood Acres7,875Reverse T3 Test – rT3 TestingRockville7,612Reverse T3 Test – rT3 TestingNew Canaan7,399Reverse T3 Test – rT3 TestingStaples7,125Reverse T3 Test – rT3 TestingCos Cob7,089Reverse T3 Test – rT3 TestingOld Greenwich6,929Reverse T3 Test – rT3 TestingWinsted6,662Reverse T3 Test – rT3 TestingNorthford6,117Reverse T3 Test – rT3 TestingSimsbury Center6,072Reverse T3 Test – rT3 TestingHazardville6,070Reverse T3 Test – rT3 TestingCheshire Village6,006Reverse T3 Test – rT3 TestingBranford Center5,934Reverse T3 Test – rT3 TestingDaniels Farm5,764Reverse T3 Test – rT3 TestingSherwood Manor5,710Reverse T3 Test – rT3 TestingNoroton5,682Reverse T3 Test – rT3 TestingPawcatuck5,383Reverse T3 Test – rT3 TestingLake Pocotopaug5,124Reverse T3 Test – rT3 TestingTerryville5,110Reverse T3 Test – rT3 TestingByram4,994Reverse T3 Test – rT3 TestingLong Hill4,645Reverse T3 Test – rT3 TestingQuinnipiac University4,614Reverse T3 Test – rT3 TestingStafford Springs4,611Reverse T3 Test – rT3 TestingMystic4,354Reverse T3 Test – rT3 TestingEast Village4,250Reverse T3 Test – rT3 TestingHeritage Village4,232Reverse T3 Test – rT3 TestingDanielson4,146Reverse T3 Test – rT3 TestingBroad Brook4,145Reverse T3 Test – rT3 TestingOronoque3,790Reverse T3 Test – rT3 Testing