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Territories · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Puerto Rico

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 Puerto Rico communities

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

San Juan1,915,105Reverse T3 Test – rT3 TestingAguadilla260,331Reverse T3 Test – rT3 TestingBayamón170,028Reverse T3 Test – rT3 TestingCarolina139,735Reverse T3 Test – rT3 TestingPonce124,719Reverse T3 Test – rT3 TestingArecibo123,499Reverse T3 Test – rT3 TestingSan Germán103,747Reverse T3 Test – rT3 TestingMayagüez93,426Reverse T3 Test – rT3 TestingYauco80,307Reverse T3 Test – rT3 TestingFajardo75,549Reverse T3 Test – rT3 TestingCaguas74,502Reverse T3 Test – rT3 TestingJuana Díaz71,759Reverse T3 Test – rT3 TestingGuaynabo70,542Reverse T3 Test – rT3 TestingFlorida69,427Reverse T3 Test – rT3 TestingGuayama65,343Reverse T3 Test – rT3 TestingTrujillo Alto44,203Reverse T3 Test – rT3 TestingCataño23,536Reverse T3 Test – rT3 TestingVega Baja23,527Reverse T3 Test – rT3 TestingHumacao17,607Reverse T3 Test – rT3 TestingCandelaria15,498Reverse T3 Test – rT3 TestingCayey14,052Reverse T3 Test – rT3 TestingDorado13,008Reverse T3 Test – rT3 TestingRío Grande12,216Reverse T3 Test – rT3 TestingCanóvanas12,211Reverse T3 Test – rT3 TestingManatí12,207Reverse T3 Test – rT3 TestingCaño Martin Peña12,112Reverse T3 Test – rT3 TestingHormigueros11,358Reverse T3 Test – rT3 TestingSabana Grande11,128Reverse T3 Test – rT3 TestingCoamo10,508Reverse T3 Test – rT3 TestingIsabela10,457Reverse T3 Test – rT3 TestingCabo Rojo10,011Reverse T3 Test – rT3 TestingCorozal9,986Reverse T3 Test – rT3 TestingPájaros9,713Reverse T3 Test – rT3 TestingVega Alta9,457Reverse T3 Test – rT3 TestingSan Lorenzo8,628Reverse T3 Test – rT3 TestingSan Sebastián8,568Reverse T3 Test – rT3 TestingAibonito8,532Reverse T3 Test – rT3 TestingArroyo8,438Reverse T3 Test – rT3 TestingJuncos8,174Reverse T3 Test – rT3 TestingLuquillo7,898Reverse T3 Test – rT3 TestingSan Isidro7,613Reverse T3 Test – rT3 TestingUtuado7,336Reverse T3 Test – rT3 TestingSabana Seca7,330Reverse T3 Test – rT3 TestingSan Antonio7,311Reverse T3 Test – rT3 TestingPuerto Real6,966Reverse T3 Test – rT3 TestingGurabo6,882Reverse T3 Test – rT3 TestingYabucoa6,466Reverse T3 Test – rT3 TestingCidra6,139Reverse T3 Test – rT3 TestingGuánica6,042Reverse T3 Test – rT3 TestingCeiba5,876Reverse T3 Test – rT3 TestingLas Piedras5,785Reverse T3 Test – rT3 TestingQuebradillas5,528Reverse T3 Test – rT3 TestingPeñuelas5,497Reverse T3 Test – rT3 TestingNaguabo5,487Reverse T3 Test – rT3 TestingLajas5,453Reverse T3 Test – rT3 TestingSanta Isabel5,433Reverse T3 Test – rT3 TestingLares5,203Reverse T3 Test – rT3 TestingAñasco5,042Reverse T3 Test – rT3 TestingCoco4,942Reverse T3 Test – rT3 TestingSalinas4,771Reverse T3 Test – rT3 Testing