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Pacific · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Oregon

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 Oregon communities

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

Portland2,036,875Reverse T3 Test – rT3 TestingEugene273,904Reverse T3 Test – rT3 TestingSalem268,634Reverse T3 Test – rT3 TestingMedford178,457Reverse T3 Test – rT3 TestingGresham114,164Reverse T3 Test – rT3 TestingBend109,224Reverse T3 Test – rT3 TestingHillsboro105,909Reverse T3 Test – rT3 TestingBeaverton97,466Reverse T3 Test – rT3 TestingAlbany66,405Reverse T3 Test – rT3 TestingCorvallis66,090Reverse T3 Test – rT3 TestingSpringfield62,138Reverse T3 Test – rT3 TestingTigard54,750Reverse T3 Test – rT3 TestingAloha52,704Reverse T3 Test – rT3 TestingLake Oswego40,390Reverse T3 Test – rT3 TestingKeizer39,119Reverse T3 Test – rT3 TestingGrants Pass38,902Reverse T3 Test – rT3 TestingOregon City37,160Reverse T3 Test – rT3 TestingMcMinnville34,224Reverse T3 Test – rT3 TestingRedmond33,160Reverse T3 Test – rT3 TestingBethany29,277Reverse T3 Test – rT3 TestingTualatin27,821Reverse T3 Test – rT3 TestingWest Linn27,173Reverse T3 Test – rT3 TestingWilsonville25,887Reverse T3 Test – rT3 TestingWoodburn25,877Reverse T3 Test – rT3 TestingForest Grove25,767Reverse T3 Test – rT3 TestingNewberg25,108Reverse T3 Test – rT3 TestingRoseburg23,551Reverse T3 Test – rT3 TestingHappy Valley23,442Reverse T3 Test – rT3 TestingHayesville21,887Reverse T3 Test – rT3 TestingKlamath Falls21,710Reverse T3 Test – rT3 TestingAshland21,348Reverse T3 Test – rT3 TestingMilwaukie21,108Reverse T3 Test – rT3 TestingSherwood20,281Reverse T3 Test – rT3 TestingAltamont19,569Reverse T3 Test – rT3 TestingHermiston19,141Reverse T3 Test – rT3 TestingCedar Mill18,987Reverse T3 Test – rT3 TestingCentral Point18,948Reverse T3 Test – rT3 TestingLebanon18,150Reverse T3 Test – rT3 TestingCanby18,078Reverse T3 Test – rT3 TestingOak Grove17,382Reverse T3 Test – rT3 TestingPendleton16,861Reverse T3 Test – rT3 TestingDallas16,663Reverse T3 Test – rT3 TestingFour Corners16,608Reverse T3 Test – rT3 TestingTroutdale16,353Reverse T3 Test – rT3 TestingThe Dalles15,942Reverse T3 Test – rT3 TestingCoos Bay15,921Reverse T3 Test – rT3 TestingSt. Helens13,808Reverse T3 Test – rT3 TestingLa Grande13,212Reverse T3 Test – rT3 TestingOatfield12,993Reverse T3 Test – rT3 TestingCornelius12,893Reverse T3 Test – rT3 TestingSandy12,383Reverse T3 Test – rT3 TestingGladstone12,017Reverse T3 Test – rT3 TestingOak Hills11,715Reverse T3 Test – rT3 TestingSanta Clara11,680Reverse T3 Test – rT3 TestingOntario11,465Reverse T3 Test – rT3 TestingDamascus10,878Reverse T3 Test – rT3 TestingMonmouth10,735Reverse T3 Test – rT3 TestingPrineville10,611Reverse T3 Test – rT3 TestingCottage Grove10,569Reverse T3 Test – rT3 TestingFairview10,439Reverse T3 Test – rT3 Testing