Midwest · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Wisconsin

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 Wisconsin communities

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

Milwaukee1,340,981Reverse T3 Test – rT3 Testing Madison461,778Reverse T3 Test – rT3 Testing Green Bay219,472Reverse T3 Test – rT3 Testing Appleton218,448Reverse T3 Test – rT3 Testing Racine135,352Reverse T3 Test – rT3 Testing Kenosha123,061Reverse T3 Test – rT3 Testing Eau Claire103,586Reverse T3 Test – rT3 Testing La Crosse99,227Reverse T3 Test – rT3 Testing Wausau76,016Reverse T3 Test – rT3 Testing Oshkosh74,737Reverse T3 Test – rT3 Testing Janesville71,907Reverse T3 Test – rT3 Testing Waukesha71,307Reverse T3 Test – rT3 Testing Sheboygan70,234Reverse T3 Test – rT3 Testing West Bend69,672Reverse T3 Test – rT3 Testing West Allis60,220Reverse T3 Test – rT3 Testing Wauwatosa48,072Reverse T3 Test – rT3 Testing Fond du Lac44,412Reverse T3 Test – rT3 Testing Brookfield41,020Reverse T3 Test – rT3 Testing New Berlin40,289Reverse T3 Test – rT3 Testing Menomonee Falls38,219Reverse T3 Test – rT3 Testing Greenfield37,623Reverse T3 Test – rT3 Testing Franklin36,685Reverse T3 Test – rT3 Testing Beloit36,567Reverse T3 Test – rT3 Testing Oak Creek36,266Reverse T3 Test – rT3 Testing Sun Prairie35,528Reverse T3 Test – rT3 Testing Manitowoc34,267Reverse T3 Test – rT3 Testing Fitchburg29,361Reverse T3 Test – rT3 Testing Mount Pleasant27,572Reverse T3 Test – rT3 Testing Neenah27,194Reverse T3 Test – rT3 Testing Superior26,601Reverse T3 Test – rT3 Testing Stevens Point25,752Reverse T3 Test – rT3 Testing Caledonia25,288Reverse T3 Test – rT3 Testing De Pere25,216Reverse T3 Test – rT3 Testing Muskego24,991Reverse T3 Test – rT3 Testing Mequon24,814Reverse T3 Test – rT3 Testing Watertown23,030Reverse T3 Test – rT3 Testing Middleton21,634Reverse T3 Test – rT3 Testing Pleasant Prairie21,193Reverse T3 Test – rT3 Testing South Milwaukee20,785Reverse T3 Test – rT3 Testing Germantown20,780Reverse T3 Test – rT3 Testing Howard19,828Reverse T3 Test – rT3 Testing Fox Crossing18,907Reverse T3 Test – rT3 Testing Onalaska18,760Reverse T3 Test – rT3 Testing Wisconsin Rapids18,711Reverse T3 Test – rT3 Testing Marshfield18,668Reverse T3 Test – rT3 Testing Cudahy18,197Reverse T3 Test – rT3 Testing Menasha18,157Reverse T3 Test – rT3 Testing Oconomowoc17,969Reverse T3 Test – rT3 Testing Ashwaubenon17,042Reverse T3 Test – rT3 Testing Kaukauna16,929Reverse T3 Test – rT3 Testing Menomonie16,721Reverse T3 Test – rT3 Testing Beaver Dam16,594Reverse T3 Test – rT3 Testing River Falls16,058Reverse T3 Test – rT3 Testing Bellevue15,922Reverse T3 Test – rT3 Testing Weston15,609Reverse T3 Test – rT3 Testing Hartford15,526Reverse T3 Test – rT3 Testing Whitefish Bay14,818Reverse T3 Test – rT3 Testing Greendale14,735Reverse T3 Test – rT3 Testing Waunakee14,679Reverse T3 Test – rT3 Testing Salem Lakes14,630Reverse T3 Test – rT3 Testing