Mid-Atlantic · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Delaware

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 Delaware communities

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

Dover125,931Reverse T3 Test – rT3 Testing Wilmington70,926Reverse T3 Test – rT3 Testing Newark31,393Reverse T3 Test – rT3 Testing Middletown23,001Reverse T3 Test – rT3 Testing Bear21,625Reverse T3 Test – rT3 Testing Glasgow15,342Reverse T3 Test – rT3 Testing Brookside14,202Reverse T3 Test – rT3 Testing Hockessin13,464Reverse T3 Test – rT3 Testing Smyrna12,619Reverse T3 Test – rT3 Testing Pike Creek Valley11,718Reverse T3 Test – rT3 Testing Milford11,249Reverse T3 Test – rT3 Testing Claymont9,508Reverse T3 Test – rT3 Testing Wilmington Manor8,212Reverse T3 Test – rT3 Testing North Star8,009Reverse T3 Test – rT3 Testing Seaford7,852Reverse T3 Test – rT3 Testing Pike Creek7,398Reverse T3 Test – rT3 Testing Georgetown7,079Reverse T3 Test – rT3 Testing Edgemoor6,681Reverse T3 Test – rT3 Testing Millsboro6,542Reverse T3 Test – rT3 Testing Elsmere6,167Reverse T3 Test – rT3 Testing New Castle5,482Reverse T3 Test – rT3 Testing Highland Acres3,910Reverse T3 Test – rT3 Testing Laurel3,886Reverse T3 Test – rT3 Testing Clayton3,845Reverse T3 Test – rT3 Testing Camden3,786Reverse T3 Test – rT3 Testing Rising Sun-Lebanon3,772Reverse T3 Test – rT3 Testing Harrington3,730Reverse T3 Test – rT3 Testing Lewes3,257Reverse T3 Test – rT3 Testing Milton3,224Reverse T3 Test – rT3 Testing Dover Base Housing3,135Reverse T3 Test – rT3 Testing Long Neck3,022Reverse T3 Test – rT3 Testing Selbyville2,806Reverse T3 Test – rT3 Testing Greenville2,763Reverse T3 Test – rT3 Testing Townsend2,671Reverse T3 Test – rT3 Testing Ocean View2,556Reverse T3 Test – rT3 Testing Bridgeville2,499Reverse T3 Test – rT3 Testing Delmar2,241Reverse T3 Test – rT3 Testing Riverview2,091Reverse T3 Test – rT3 Testing Delaware City1,885Reverse T3 Test – rT3 Testing Woodside East1,867Reverse T3 Test – rT3 Testing Millville1,790Reverse T3 Test – rT3 Testing Kent Acres1,756Reverse T3 Test – rT3 Testing Cheswold1,705Reverse T3 Test – rT3 Testing Wyoming1,636Reverse T3 Test – rT3 Testing Rodney Village1,472Reverse T3 Test – rT3 Testing Greenwood1,459Reverse T3 Test – rT3 Testing Rehoboth Beach1,392Reverse T3 Test – rT3 Testing Bellefonte1,294Reverse T3 Test – rT3 Testing Newport1,224Reverse T3 Test – rT3 Testing St. Georges1,197Reverse T3 Test – rT3 Testing Felton1,144Reverse T3 Test – rT3 Testing Frankford1,088Reverse T3 Test – rT3 Testing Dagsboro1,087Reverse T3 Test – rT3 Testing