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Mountain West · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Colorado

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 Colorado communities

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

Denver2,650,725Reverse T3 Test – rT3 TestingColorado Springs628,808Reverse T3 Test – rT3 TestingAurora383,496Reverse T3 Test – rT3 TestingFort Collins301,596Reverse T3 Test – rT3 TestingLakewood155,608Reverse T3 Test – rT3 TestingPueblo142,727Reverse T3 Test – rT3 TestingThornton140,538Reverse T3 Test – rT3 TestingGreeley135,270Reverse T3 Test – rT3 TestingGrand Junction134,074Reverse T3 Test – rT3 TestingArvada122,903Reverse T3 Test – rT3 TestingBoulder120,818Reverse T3 Test – rT3 TestingWestminster115,535Reverse T3 Test – rT3 TestingCentennial107,972Reverse T3 Test – rT3 TestingLongmont104,035Reverse T3 Test – rT3 TestingHighlands Ranch103,238Reverse T3 Test – rT3 TestingLafayette99,475Reverse T3 Test – rT3 TestingLoveland75,938Reverse T3 Test – rT3 TestingBroomfield72,697Reverse T3 Test – rT3 TestingCastle Rock71,037Reverse T3 Test – rT3 TestingCommerce City61,516Reverse T3 Test – rT3 TestingParker57,311Reverse T3 Test – rT3 TestingLittleton45,465Reverse T3 Test – rT3 TestingSecurity-Widefield40,158Reverse T3 Test – rT3 TestingBrighton39,895Reverse T3 Test – rT3 TestingNorthglenn37,899Reverse T3 Test – rT3 TestingDakota Ridge34,361Reverse T3 Test – rT3 TestingKen Caryl33,889Reverse T3 Test – rT3 TestingEnglewood33,500Reverse T3 Test – rT3 TestingPueblo West32,991Reverse T3 Test – rT3 TestingWheat Ridge32,340Reverse T3 Test – rT3 TestingWindsor31,972Reverse T3 Test – rT3 TestingFountain29,495Reverse T3 Test – rT3 TestingErie29,367Reverse T3 Test – rT3 TestingColumbine25,924Reverse T3 Test – rT3 TestingEvans21,727Reverse T3 Test – rT3 TestingFour Square Mile21,723Reverse T3 Test – rT3 TestingLouisville21,091Reverse T3 Test – rT3 TestingClifton20,122Reverse T3 Test – rT3 TestingMontrose20,098Reverse T3 Test – rT3 TestingSherrelwood20,069Reverse T3 Test – rT3 TestingGolden20,041Reverse T3 Test – rT3 TestingDurango18,953Reverse T3 Test – rT3 TestingCimarron Hills18,619Reverse T3 Test – rT3 TestingCañon City17,157Reverse T3 Test – rT3 TestingFort Carson16,743Reverse T3 Test – rT3 TestingJohnstown16,596Reverse T3 Test – rT3 TestingWelby16,260Reverse T3 Test – rT3 TestingFirestone15,949Reverse T3 Test – rT3 TestingGreenwood Village15,548Reverse T3 Test – rT3 TestingBlack Forest14,375Reverse T3 Test – rT3 TestingFrederick14,127Reverse T3 Test – rT3 TestingFederal Heights14,111Reverse T3 Test – rT3 TestingSterling13,976Reverse T3 Test – rT3 TestingLone Tree13,701Reverse T3 Test – rT3 TestingFruita13,296Reverse T3 Test – rT3 TestingSuperior13,283Reverse T3 Test – rT3 TestingSteamboat Springs13,193Reverse T3 Test – rT3 TestingFort Morgan11,483Reverse T3 Test – rT3 TestingCherry Creek11,389Reverse T3 Test – rT3 TestingCastle Pines11,296Reverse T3 Test – rT3 Testing