Midwest · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in South Dakota

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 South Dakota communities

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

Sioux Falls189,258Reverse T3 Test – rT3 Testing Rapid City88,076Reverse T3 Test – rT3 Testing Aberdeen28,500Reverse T3 Test – rT3 Testing Brookings23,432Reverse T3 Test – rT3 Testing Watertown22,577Reverse T3 Test – rT3 Testing Mitchell15,677Reverse T3 Test – rT3 Testing Yankton15,332Reverse T3 Test – rT3 Testing Pierre14,126Reverse T3 Test – rT3 Testing Huron14,060Reverse T3 Test – rT3 Testing Spearfish12,031Reverse T3 Test – rT3 Testing Box Elder11,527Reverse T3 Test – rT3 Testing Vermillion11,506Reverse T3 Test – rT3 Testing Brandon10,745Reverse T3 Test – rT3 Testing Rapid Valley7,875Reverse T3 Test – rT3 Testing Sturgis7,088Reverse T3 Test – rT3 Testing Harrisburg6,645Reverse T3 Test – rT3 Testing Madison6,388Reverse T3 Test – rT3 Testing Belle Fourche5,561Reverse T3 Test – rT3 Testing Tea5,535Reverse T3 Test – rT3 Testing Dell Rapids3,940Reverse T3 Test – rT3 Testing Dakota Dunes3,688Reverse T3 Test – rT3 Testing Milbank3,488Reverse T3 Test – rT3 Testing Hot Springs3,407Reverse T3 Test – rT3 Testing Hartford3,263Reverse T3 Test – rT3 Testing Mobridge3,215Reverse T3 Test – rT3 Testing Pine Ridge3,085Reverse T3 Test – rT3 Testing Blackhawk3,081Reverse T3 Test – rT3 Testing Canton3,054Reverse T3 Test – rT3 Testing Lead2,989Reverse T3 Test – rT3 Testing North Sioux City2,956Reverse T3 Test – rT3 Testing Winner2,882Reverse T3 Test – rT3 Testing Summerset2,875Reverse T3 Test – rT3 Testing Lennox2,617Reverse T3 Test – rT3 Testing Sisseton2,433Reverse T3 Test – rT3 Testing Fort Pierre2,426Reverse T3 Test – rT3 Testing Colonial Pine Hills2,425Reverse T3 Test – rT3 Testing Chamberlain2,400Reverse T3 Test – rT3 Testing Beresford2,359Reverse T3 Test – rT3 Testing Flandreau2,298Reverse T3 Test – rT3 Testing Elk Point2,248Reverse T3 Test – rT3 Testing North Spearfish2,198Reverse T3 Test – rT3 Testing Redfield2,160Reverse T3 Test – rT3 Testing Volga2,146Reverse T3 Test – rT3 Testing Springfield2,108Reverse T3 Test – rT3 Testing Custer2,067Reverse T3 Test – rT3 Testing Rosebud1,994Reverse T3 Test – rT3 Testing Webster1,772Reverse T3 Test – rT3 Testing Parkston1,761Reverse T3 Test – rT3 Testing North Eagle Butte1,731Reverse T3 Test – rT3 Testing Freeman1,711Reverse T3 Test – rT3 Testing Groton1,641Reverse T3 Test – rT3 Testing Wagner1,533Reverse T3 Test – rT3 Testing Gettysburg1,464Reverse T3 Test – rT3 Testing Eagle Butte1,421Reverse T3 Test – rT3 Testing Kyle1,398Reverse T3 Test – rT3 Testing Clear Lake1,396Reverse T3 Test – rT3 Testing Garretson1,367Reverse T3 Test – rT3 Testing Crooks1,365Reverse T3 Test – rT3 Testing Aurora1,339Reverse T3 Test – rT3 Testing Miller1,338Reverse T3 Test – rT3 Testing