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Midwest · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Illinois

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 Illinois communities

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

Chicago8,595,181Reverse T3 Test – rT3 TestingRockford289,763Reverse T3 Test – rT3 TestingRound Lake Beach287,012Reverse T3 Test – rT3 TestingPeoria255,718Reverse T3 Test – rT3 TestingAurora183,447Reverse T3 Test – rT3 TestingSpringfield162,588Reverse T3 Test – rT3 TestingChampaign153,278Reverse T3 Test – rT3 TestingJoliet150,323Reverse T3 Test – rT3 TestingNaperville149,013Reverse T3 Test – rT3 TestingBloomington134,357Reverse T3 Test – rT3 TestingElgin114,156Reverse T3 Test – rT3 TestingWaukegan89,751Reverse T3 Test – rT3 TestingDecatur88,002Reverse T3 Test – rT3 TestingCicero84,905Reverse T3 Test – rT3 TestingAlton83,705Reverse T3 Test – rT3 TestingKankakee82,095Reverse T3 Test – rT3 TestingEvanston78,454Reverse T3 Test – rT3 TestingSchaumburg78,053Reverse T3 Test – rT3 TestingArlington Heights77,283Reverse T3 Test – rT3 TestingBolingbrook73,807Reverse T3 Test – rT3 TestingPalatine67,754Reverse T3 Test – rT3 TestingSkokie67,444Reverse T3 Test – rT3 TestingDeKalb66,624Reverse T3 Test – rT3 TestingCarbondale66,482Reverse T3 Test – rT3 TestingDes Plaines60,413Reverse T3 Test – rT3 TestingOrland Park58,622Reverse T3 Test – rT3 TestingOak Lawn58,032Reverse T3 Test – rT3 TestingBerwyn56,960Reverse T3 Test – rT3 TestingMount Prospect56,510Reverse T3 Test – rT3 TestingTinley Park55,988Reverse T3 Test – rT3 TestingOak Park54,100Reverse T3 Test – rT3 TestingWheaton53,762Reverse T3 Test – rT3 TestingNormal53,446Reverse T3 Test – rT3 TestingHoffman Estates52,153Reverse T3 Test – rT3 TestingDowners Grove50,209Reverse T3 Test – rT3 TestingGlenview48,150Reverse T3 Test – rT3 TestingElmhurst45,661Reverse T3 Test – rT3 TestingLombard44,311Reverse T3 Test – rT3 TestingPlainfield44,296Reverse T3 Test – rT3 TestingBuffalo Grove43,062Reverse T3 Test – rT3 TestingMoline42,660Reverse T3 Test – rT3 TestingBelleville42,463Reverse T3 Test – rT3 TestingBartlett41,126Reverse T3 Test – rT3 TestingRomeoville40,099Reverse T3 Test – rT3 TestingCrystal Lake40,082Reverse T3 Test – rT3 TestingCarol Stream39,895Reverse T3 Test – rT3 TestingStreamwood39,736Reverse T3 Test – rT3 TestingQuincy39,687Reverse T3 Test – rT3 TestingPark Ridge39,562Reverse T3 Test – rT3 TestingUrbana39,189Reverse T3 Test – rT3 TestingWheeling39,104Reverse T3 Test – rT3 TestingCarpentersville37,940Reverse T3 Test – rT3 TestingHanover Park37,545Reverse T3 Test – rT3 TestingRock Island37,519Reverse T3 Test – rT3 TestingCalumet City36,065Reverse T3 Test – rT3 TestingAddison35,999Reverse T3 Test – rT3 TestingNorthbrook35,108Reverse T3 Test – rT3 TestingOswego34,324Reverse T3 Test – rT3 TestingWoodridge34,161Reverse T3 Test – rT3 TestingGlendale Heights33,443Reverse T3 Test – rT3 Testing