Confidential lab testing · No referral required United States · 15,280 communities
RequestALab Find and request a lab test

Mountain West · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Utah

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 Utah communities

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

Salt Lake City1,135,344Reverse T3 Test – rT3 TestingOgden608,259Reverse T3 Test – rT3 TestingProvo551,645Reverse T3 Test – rT3 TestingWest Valley City139,361Reverse T3 Test – rT3 TestingSt. George127,890Reverse T3 Test – rT3 TestingWest Jordan116,045Reverse T3 Test – rT3 TestingLogan106,319Reverse T3 Test – rT3 TestingOrem96,734Reverse T3 Test – rT3 TestingSandy96,272Reverse T3 Test – rT3 TestingLayton80,858Reverse T3 Test – rT3 TestingSouth Jordan75,617Reverse T3 Test – rT3 TestingLehi73,911Reverse T3 Test – rT3 TestingMillcreek63,430Reverse T3 Test – rT3 TestingTaylorsville60,295Reverse T3 Test – rT3 TestingHerriman52,860Reverse T3 Test – rT3 TestingMurray50,183Reverse T3 Test – rT3 TestingDraper49,978Reverse T3 Test – rT3 TestingBountiful45,496Reverse T3 Test – rT3 TestingRiverton44,773Reverse T3 Test – rT3 TestingEagle Mountain42,905Reverse T3 Test – rT3 TestingSpanish Fork41,953Reverse T3 Test – rT3 TestingRoy39,076Reverse T3 Test – rT3 TestingPleasant Grove37,228Reverse T3 Test – rT3 TestingSaratoga Springs36,977Reverse T3 Test – rT3 TestingKearns36,842Reverse T3 Test – rT3 TestingMidvale35,313Reverse T3 Test – rT3 TestingTooele35,223Reverse T3 Test – rT3 TestingSpringville34,750Reverse T3 Test – rT3 TestingCedar City34,246Reverse T3 Test – rT3 TestingCottonwood Heights33,597Reverse T3 Test – rT3 TestingAmerican Fork32,822Reverse T3 Test – rT3 TestingKaysville32,438Reverse T3 Test – rT3 TestingClearfield31,802Reverse T3 Test – rT3 TestingHolladay31,738Reverse T3 Test – rT3 TestingSyracuse31,715Reverse T3 Test – rT3 TestingMagna29,128Reverse T3 Test – rT3 TestingWashington27,689Reverse T3 Test – rT3 TestingSouth Salt Lake26,086Reverse T3 Test – rT3 TestingFarmington23,990Reverse T3 Test – rT3 TestingClinton23,192Reverse T3 Test – rT3 TestingNorth Salt Lake21,411Reverse T3 Test – rT3 TestingPayson21,093Reverse T3 Test – rT3 TestingNorth Ogden20,703Reverse T3 Test – rT3 TestingHurricane19,501Reverse T3 Test – rT3 TestingBrigham City19,373Reverse T3 Test – rT3 TestingHighland18,913Reverse T3 Test – rT3 TestingSouth Ogden17,363Reverse T3 Test – rT3 TestingWest Haven16,918Reverse T3 Test – rT3 TestingCenterville16,711Reverse T3 Test – rT3 TestingBluffdale16,576Reverse T3 Test – rT3 TestingHeber16,416Reverse T3 Test – rT3 TestingSantaquin13,602Reverse T3 Test – rT3 TestingSmithfield13,263Reverse T3 Test – rT3 TestingGrantsville12,331Reverse T3 Test – rT3 TestingVineyard11,579Reverse T3 Test – rT3 TestingWoods Cross11,372Reverse T3 Test – rT3 TestingLindon11,346Reverse T3 Test – rT3 TestingMapleton11,226Reverse T3 Test – rT3 TestingWest Point10,963Reverse T3 Test – rT3 TestingPleasant View10,733Reverse T3 Test – rT3 Testing