Midwest · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Minnesota

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 Minnesota communities

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

Minneapolis2,856,952Reverse T3 Test – rT3 Testing St. Paul309,751Reverse T3 Test – rT3 Testing St. Cloud123,569Reverse T3 Test – rT3 Testing Rochester119,732Reverse T3 Test – rT3 Testing Duluth118,975Reverse T3 Test – rT3 Testing Bloomington89,436Reverse T3 Test – rT3 Testing Brooklyn Park85,247Reverse T3 Test – rT3 Testing Plymouth80,034Reverse T3 Test – rT3 Testing Woodbury74,014Reverse T3 Test – rT3 Testing Maple Grove69,900Reverse T3 Test – rT3 Testing Lakeville69,026Reverse T3 Test – rT3 Testing Blaine68,999Reverse T3 Test – rT3 Testing Eagan68,205Reverse T3 Test – rT3 Testing Eden Prairie64,048Reverse T3 Test – rT3 Testing Burnsville63,926Reverse T3 Test – rT3 Testing Coon Rapids63,269Reverse T3 Test – rT3 Testing Apple Valley55,237Reverse T3 Test – rT3 Testing Minnetonka53,809Reverse T3 Test – rT3 Testing Edina53,059Reverse T3 Test – rT3 Testing St. Louis Park49,539Reverse T3 Test – rT3 Testing Moorhead44,129Reverse T3 Test – rT3 Testing Mankato43,938Reverse T3 Test – rT3 Testing Shakopee43,396Reverse T3 Test – rT3 Testing Maplewood41,673Reverse T3 Test – rT3 Testing Cottage Grove38,582Reverse T3 Test – rT3 Testing Richfield36,899Reverse T3 Test – rT3 Testing Roseville36,119Reverse T3 Test – rT3 Testing Inver Grove Heights35,539Reverse T3 Test – rT3 Testing Brooklyn Center33,298Reverse T3 Test – rT3 Testing Andover32,471Reverse T3 Test – rT3 Testing Savage32,092Reverse T3 Test – rT3 Testing Fridley29,422Reverse T3 Test – rT3 Testing Oakdale28,019Reverse T3 Test – rT3 Testing Chaska27,461Reverse T3 Test – rT3 Testing Ramsey27,409Reverse T3 Test – rT3 Testing Prior Lake27,242Reverse T3 Test – rT3 Testing Shoreview26,871Reverse T3 Test – rT3 Testing Owatonna26,366Reverse T3 Test – rT3 Testing Winona26,199Reverse T3 Test – rT3 Testing Austin26,030Reverse T3 Test – rT3 Testing Chanhassen25,646Reverse T3 Test – rT3 Testing Rosemount25,513Reverse T3 Test – rT3 Testing Elk River25,467Reverse T3 Test – rT3 Testing White Bear Lake24,520Reverse T3 Test – rT3 Testing Faribault24,310Reverse T3 Test – rT3 Testing Champlin23,877Reverse T3 Test – rT3 Testing New Brighton23,293Reverse T3 Test – rT3 Testing Farmington23,253Reverse T3 Test – rT3 Testing Crystal23,143Reverse T3 Test – rT3 Testing Golden Valley22,247Reverse T3 Test – rT3 Testing Hastings22,063Reverse T3 Test – rT3 Testing New Hope21,683Reverse T3 Test – rT3 Testing Columbia Heights21,612Reverse T3 Test – rT3 Testing Lino Lakes21,180Reverse T3 Test – rT3 Testing Willmar20,823Reverse T3 Test – rT3 Testing South St. Paul20,637Reverse T3 Test – rT3 Testing West St. Paul20,476Reverse T3 Test – rT3 Testing Northfield20,374Reverse T3 Test – rT3 Testing Forest Lake20,366Reverse T3 Test – rT3 Testing Otsego19,565Reverse T3 Test – rT3 Testing