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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 blood test measures a form of thyroid hormone that may be elevated during certain illnesses.

Typical turnaround1-3 business days
Price range$118
PreparationFollow the lab's instructions.
Sample typeBlood draw at a collection lab
ReferralNo referral required

What this test is

Reverse T3 (rT3) is an inactive form of thyroid hormone. This test helps evaluate thyroid function, particularly in situations where other thyroid tests may appear normal.

What it measures

  • Reverse T3 (rT3) — reflects an inactive form of thyroid hormone

What the test involves

This test requires a blood sample, which is typically collected through a standard venipuncture procedure at a laboratory or clinic.

Why it is often ordered

Clinicians may order this test to help assess thyroid hormone metabolism, especially when considering conditions like nonthyroidal illness syndrome. It can provide additional information when evaluating thyroid health in the context of other medical conditions.

Preparation

You will need to follow specific instructions provided by the laboratory regarding preparation for this test. This may include fasting or avoiding certain medications.

How results are reported

Results are typically available within a few business days and will be reported to your clinician. Reference ranges, which indicate what is considered normal, vary between laboratories.

Before you go

  • Fasting requirements
  • Medication restrictions
  • Test 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