Mid-Atlantic · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Maryland

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 Maryland communities

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

Baltimore2,205,092Reverse T3 Test – rT3 Testing Bel Air South222,834Reverse T3 Test – rT3 Testing Hagerstown194,602Reverse T3 Test – rT3 Testing Frederick175,032Reverse T3 Test – rT3 Testing Waldorf119,442Reverse T3 Test – rT3 Testing Salisbury108,982Reverse T3 Test – rT3 Testing Columbia105,086Reverse T3 Test – rT3 Testing Germantown90,235Reverse T3 Test – rT3 Testing Silver Spring82,472Reverse T3 Test – rT3 Testing Ellicott City74,432Reverse T3 Test – rT3 Testing Eldersburg70,639Reverse T3 Test – rT3 Testing Glen Burnie69,739Reverse T3 Test – rT3 Testing Gaithersburg68,827Reverse T3 Test – rT3 Testing Rockville67,095Reverse T3 Test – rT3 Testing Dundalk66,426Reverse T3 Test – rT3 Testing Bethesda66,294Reverse T3 Test – rT3 Testing Towson59,014Reverse T3 Test – rT3 Testing Bowie58,113Reverse T3 Test – rT3 Testing Severn53,955Reverse T3 Test – rT3 Testing Aspen Hill53,850Reverse T3 Test – rT3 Testing Wheaton51,836Reverse T3 Test – rT3 Testing North Bethesda50,695Reverse T3 Test – rT3 Testing Potomac46,891Reverse T3 Test – rT3 Testing Odenton43,488Reverse T3 Test – rT3 Testing Catonsville42,789Reverse T3 Test – rT3 Testing Woodlawn42,053Reverse T3 Test – rT3 Testing Essex40,710Reverse T3 Test – rT3 Testing Annapolis40,581Reverse T3 Test – rT3 Testing Clinton39,925Reverse T3 Test – rT3 Testing Severna Park39,108Reverse T3 Test – rT3 Testing Chillum36,428Reverse T3 Test – rT3 Testing Olney35,815Reverse T3 Test – rT3 Testing Randallstown35,641Reverse T3 Test – rT3 Testing Owings Mills35,170Reverse T3 Test – rT3 Testing College Park34,961Reverse T3 Test – rT3 Testing Montgomery Village34,489Reverse T3 Test – rT3 Testing Pikesville33,549Reverse T3 Test – rT3 Testing Pasadena31,583Reverse T3 Test – rT3 Testing Bel Air North30,969Reverse T3 Test – rT3 Testing Parkville30,783Reverse T3 Test – rT3 Testing Milford Mill30,685Reverse T3 Test – rT3 Testing Middle River30,606Reverse T3 Test – rT3 Testing Carney29,873Reverse T3 Test – rT3 Testing Crofton29,812Reverse T3 Test – rT3 Testing Laurel29,438Reverse T3 Test – rT3 Testing Perry Hall29,165Reverse T3 Test – rT3 Testing South Laurel27,998Reverse T3 Test – rT3 Testing Reisterstown27,917Reverse T3 Test – rT3 Testing Ilchester27,513Reverse T3 Test – rT3 Testing Clarksburg27,354Reverse T3 Test – rT3 Testing Lochearn26,995Reverse T3 Test – rT3 Testing Suitland26,375Reverse T3 Test – rT3 Testing Fort Washington25,840Reverse T3 Test – rT3 Testing Fairland25,324Reverse T3 Test – rT3 Testing Arnold25,056Reverse T3 Test – rT3 Testing Edgewood25,004Reverse T3 Test – rT3 Testing Greenbelt24,602Reverse T3 Test – rT3 Testing Landover24,508Reverse T3 Test – rT3 Testing North Potomac24,449Reverse T3 Test – rT3 Testing North Laurel24,233Reverse T3 Test – rT3 Testing