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Pacific · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Alaska

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 Alaska communities

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

Anchorage292,545Reverse T3 Test – rT3 TestingFairbanks64,160Reverse T3 Test – rT3 TestingJuneau32,240Reverse T3 Test – rT3 TestingBadger19,226Reverse T3 Test – rT3 TestingKnik-Fairview18,282Reverse T3 Test – rT3 TestingCollege11,797Reverse T3 Test – rT3 TestingTanaina10,314Reverse T3 Test – rT3 TestingNorth Lakes9,941Reverse T3 Test – rT3 TestingWasilla9,098Reverse T3 Test – rT3 TestingSitka8,518Reverse T3 Test – rT3 TestingKalifornsky8,428Reverse T3 Test – rT3 TestingMeadow Lakes8,367Reverse T3 Test – rT3 TestingKetchikan8,150Reverse T3 Test – rT3 TestingKenai7,452Reverse T3 Test – rT3 TestingSteele Creek7,399Reverse T3 Test – rT3 TestingSouth Lakes6,421Reverse T3 Test – rT3 TestingGateway6,305Reverse T3 Test – rT3 TestingBethel6,273Reverse T3 Test – rT3 TestingSterling6,016Reverse T3 Test – rT3 TestingPalmer5,978Reverse T3 Test – rT3 TestingKodiak5,682Reverse T3 Test – rT3 TestingChena Ridge5,643Reverse T3 Test – rT3 TestingHomer5,531Reverse T3 Test – rT3 TestingUtqiagvik5,123Reverse T3 Test – rT3 TestingFishhook5,055Reverse T3 Test – rT3 TestingSoldotna4,370Reverse T3 Test – rT3 TestingUnalaska4,339Reverse T3 Test – rT3 TestingNikiski4,232Reverse T3 Test – rT3 TestingFarmers Loop4,216Reverse T3 Test – rT3 TestingValdez3,966Reverse T3 Test – rT3 TestingButte3,857Reverse T3 Test – rT3 TestingMill Bay3,719Reverse T3 Test – rT3 TestingNome3,685Reverse T3 Test – rT3 TestingPetersburg3,259Reverse T3 Test – rT3 TestingEielson AFB3,240Reverse T3 Test – rT3 TestingKotzebue3,199Reverse T3 Test – rT3 TestingBig Lake2,888Reverse T3 Test – rT3 TestingNorth Pole2,825Reverse T3 Test – rT3 TestingGoldstream2,822Reverse T3 Test – rT3 TestingEster2,719Reverse T3 Test – rT3 TestingRidgeway2,689Reverse T3 Test – rT3 TestingSeward2,614Reverse T3 Test – rT3 TestingCordova2,588Reverse T3 Test – rT3 TestingFarm Loop2,549Reverse T3 Test – rT3 TestingAnchor Point2,288Reverse T3 Test – rT3 TestingKodiak Station2,183Reverse T3 Test – rT3 TestingWrangell2,162Reverse T3 Test – rT3 TestingFritz Creek2,145Reverse T3 Test – rT3 TestingDillingham2,133Reverse T3 Test – rT3 TestingDeltana2,022Reverse T3 Test – rT3 TestingWillow1,965Reverse T3 Test – rT3 TestingLazy Mountain1,766Reverse T3 Test – rT3 TestingHouston1,739Reverse T3 Test – rT3 TestingHaines1,571Reverse T3 Test – rT3 TestingCohoe1,557Reverse T3 Test – rT3 TestingBear Creek1,524Reverse T3 Test – rT3 TestingPrudhoe Bay1,500Reverse T3 Test – rT3 TestingMetlakatla1,445Reverse T3 Test – rT3 TestingDiamond Ridge1,409Reverse T3 Test – rT3 TestingPoint MacKenzie1,364Reverse T3 Test – rT3 Testing