Lab test requirements · preparation, ID, referral, and timing United States · 0 communities
LabRequirements Know what your test requires

South · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in West Virginia

This page explains the reverse t3 test – rt3 testing, what it measures, and how to order it. The Reverse T3 blood test measures a form of thyroid hormone that can help clarify unusual thyroid function test results. It is often used alongside other thyroid tests to give a fuller picture of how the body is handling thyroid hormone.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in West Virginia

Here is what you need before ordering and completing the Reverse T3 Test – rT3 Testing in WV. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
Preparation
Preparation instructions can vary depending on the laboratory and the other tests being performed at the same time. Always follow the specific instructions provided by the collection lab or…
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

Reverse T3 is a biologically inactive form of thyroid hormone produced when the body converts thyroxine (T4) in an alternative pathway. This test measures the amount of reverse T3 circulating in the blood. It is not a stand-alone diagnostic test but is interpreted with other thyroid hormone measurements.

What it measures

  • Reverse T3 — reflects the amount of this inactive thyroid hormone form in the blood
  • Total T3 — often measured alongside to assess active thyroid hormone levels
  • Free T4 — helps evaluate the main thyroid hormone produced by the thyroid gland
  • TSH — indicates how the pituitary gland is responding to thyroid hormone levels

What the test involves

A healthcare professional collects a small sample of blood, usually from a vein in your arm, using a standard blood draw. The sample is then sent to a laboratory for analysis.

Why it is often ordered

A clinician may order a reverse T3 test when thyroid test results are confusing or when a nonthyroidal illness is suspected. It is typically used to help evaluate whether symptoms or abnormal thyroid tests might be related to how the body is converting thyroid hormones.

Preparation

Preparation instructions can vary depending on the laboratory and the other tests being performed at the same time. Always follow the specific instructions provided by the collection lab or your healthcare provider.

How results are reported

Results are reported as a numeric value for reverse T3, and the laboratory will provide a reference range for comparison. Reference ranges can differ between laboratories because of differences in equipment, methods, and population, so your result should be interpreted using the range from the lab that performed the test.

Before you go

  • Whether any other tests will be drawn at the same time and if fasting is required.
  • The specific reference range used by the laboratory performing the test.
  • How and when you will receive your results.

Cities

Reverse T3 Test – rT3 Testing in West Virginia communities

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

Huntington199,133Reverse T3 Test – rT3 TestingCharleston141,640Reverse T3 Test – rT3 TestingMorgantown77,193Reverse T3 Test – rT3 TestingWheeling75,065Reverse T3 Test – rT3 TestingParkersburg68,217Reverse T3 Test – rT3 TestingWeirton65,447Reverse T3 Test – rT3 TestingMartinsburg18,502Reverse T3 Test – rT3 TestingFairmont18,369Reverse T3 Test – rT3 TestingBeckley17,261Reverse T3 Test – rT3 TestingClarksburg16,085Reverse T3 Test – rT3 TestingTeays Valley13,805Reverse T3 Test – rT3 TestingSouth Charleston13,595Reverse T3 Test – rT3 TestingSt. Albans10,842Reverse T3 Test – rT3 TestingVienna10,676Reverse T3 Test – rT3 TestingCheat Lake10,187Reverse T3 Test – rT3 TestingBluefield9,699Reverse T3 Test – rT3 TestingCross Lanes9,434Reverse T3 Test – rT3 TestingBridgeport9,165Reverse T3 Test – rT3 TestingOak Hill8,228Reverse T3 Test – rT3 TestingMoundsville8,195Reverse T3 Test – rT3 TestingDunbar7,500Reverse T3 Test – rT3 TestingElkins6,980Reverse T3 Test – rT3 TestingHurricane6,901Reverse T3 Test – rT3 TestingPea Ridge6,783Reverse T3 Test – rT3 TestingNitro6,630Reverse T3 Test – rT3 TestingBrookhaven6,606Reverse T3 Test – rT3 TestingCharles Town6,373Reverse T3 Test – rT3 TestingPrinceton5,885Reverse T3 Test – rT3 TestingRanson5,404Reverse T3 Test – rT3 TestingBuckhannon5,343Reverse T3 Test – rT3 TestingNew Martinsville5,208Reverse T3 Test – rT3 TestingKeyser4,916Reverse T3 Test – rT3 TestingGrafton4,773Reverse T3 Test – rT3 TestingBarboursville4,280Reverse T3 Test – rT3 TestingPoint Pleasant4,124Reverse T3 Test – rT3 TestingWestover4,085Reverse T3 Test – rT3 TestingWeston3,963Reverse T3 Test – rT3 TestingLewisburg3,923Reverse T3 Test – rT3 TestingRavenswood3,866Reverse T3 Test – rT3 TestingPinch3,834Reverse T3 Test – rT3 TestingBlennerhassett3,820Reverse T3 Test – rT3 TestingSummersville3,467Reverse T3 Test – rT3 TestingPleasant Valley3,460Reverse T3 Test – rT3 TestingShannondale3,441Reverse T3 Test – rT3 TestingSissonville3,342Reverse T3 Test – rT3 TestingShady Spring3,317Reverse T3 Test – rT3 TestingWinfield3,140Reverse T3 Test – rT3 TestingRipley3,100Reverse T3 Test – rT3 TestingKingwood3,091Reverse T3 Test – rT3 TestingWilliamson3,054Reverse T3 Test – rT3 TestingKenova3,052Reverse T3 Test – rT3 TestingWelch3,050Reverse T3 Test – rT3 TestingMoorefield3,019Reverse T3 Test – rT3 TestingWilliamstown2,994Reverse T3 Test – rT3 TestingPhilippi2,922Reverse T3 Test – rT3 TestingMadison2,913Reverse T3 Test – rT3 TestingCulloden2,903Reverse T3 Test – rT3 TestingFayetteville2,882Reverse T3 Test – rT3 TestingFollansbee2,842Reverse T3 Test – rT3 TestingInwood2,794Reverse T3 Test – rT3 Testing