Pacific · Reverse T3 Test – rT3 Testing

Reverse T3 Test – rT3 Testing in Hawaii

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 Hawaii communities

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

Honolulu835,291Reverse T3 Test – rT3 Testing Kailua106,260Reverse T3 Test – rT3 Testing East Honolulu50,076Reverse T3 Test – rT3 Testing Hilo46,559Reverse T3 Test – rT3 Testing Pearl City45,941Reverse T3 Test – rT3 Testing Waipahu39,927Reverse T3 Test – rT3 Testing Kaneohe34,509Reverse T3 Test – rT3 Testing Ewa Gentry28,125Reverse T3 Test – rT3 Testing Mililani Town27,974Reverse T3 Test – rT3 Testing Kahului27,938Reverse T3 Test – rT3 Testing Kapolei23,248Reverse T3 Test – rT3 Testing Kihei22,840Reverse T3 Test – rT3 Testing Mililani Mauka21,657Reverse T3 Test – rT3 Testing Makakilo20,862Reverse T3 Test – rT3 Testing Schofield Barracks18,255Reverse T3 Test – rT3 Testing Wahiawa17,357Reverse T3 Test – rT3 Testing Ocean Pointe16,676Reverse T3 Test – rT3 Testing Wailuku15,670Reverse T3 Test – rT3 Testing Halawa14,990Reverse T3 Test – rT3 Testing Ewa Beach14,614Reverse T3 Test – rT3 Testing Royal Kunia14,390Reverse T3 Test – rT3 Testing Waianae14,152Reverse T3 Test – rT3 Testing Waimalu13,818Reverse T3 Test – rT3 Testing Lahaina13,261Reverse T3 Test – rT3 Testing Maili13,245Reverse T3 Test – rT3 Testing Nanakuli12,587Reverse T3 Test – rT3 Testing Hawaiian Paradise Park11,942Reverse T3 Test – rT3 Testing Kapaa11,516Reverse T3 Test – rT3 Testing Waihee-Waiehu11,059Reverse T3 Test – rT3 Testing Waipio10,989Reverse T3 Test – rT3 Testing Waimea10,422Reverse T3 Test – rT3 Testing Hickam Housing10,022Reverse T3 Test – rT3 Testing Makaha9,710Reverse T3 Test – rT3 Testing Aiea9,527Reverse T3 Test – rT3 Testing Haiku-Pauwela9,347Reverse T3 Test – rT3 Testing Ahuimanu8,943Reverse T3 Test – rT3 Testing Lihue8,371Reverse T3 Test – rT3 Testing Makawao7,670Reverse T3 Test – rT3 Testing Waikoloa Village7,519Reverse T3 Test – rT3 Testing Kula7,495Reverse T3 Test – rT3 Testing Waikele7,495Reverse T3 Test – rT3 Testing Pukalani7,315Reverse T3 Test – rT3 Testing Kahaluu-Keauhou7,236Reverse T3 Test – rT3 Testing Napili-Honokowai6,762Reverse T3 Test – rT3 Testing Ewa Villages6,657Reverse T3 Test – rT3 Testing Wailua Homesteads6,634Reverse T3 Test – rT3 Testing Wailea6,546Reverse T3 Test – rT3 Testing Laie6,436Reverse T3 Test – rT3 Testing West Loch Estate6,239Reverse T3 Test – rT3 Testing Iroquois Point5,737Reverse T3 Test – rT3 Testing Waipio Acres5,618Reverse T3 Test – rT3 Testing Waimanalo5,371Reverse T3 Test – rT3 Testing Kahaluu5,006Reverse T3 Test – rT3 Testing Heeia4,777Reverse T3 Test – rT3 Testing Kalaheo4,776Reverse T3 Test – rT3 Testing Haleiwa4,651Reverse T3 Test – rT3 Testing Hanamaulu4,435Reverse T3 Test – rT3 Testing Pupukea4,416Reverse T3 Test – rT3 Testing Waimanalo Beach4,389Reverse T3 Test – rT3 Testing Hawaiian Beaches4,213Reverse T3 Test – rT3 Testing