TSH Lab Test | Thyroid Function Test (Blood)

Thyroid TSH Function Test

This thyroid function test measures the TSH levels in your blood to help determine if your thyroid gland is functioning properly and identify signs of hypothyroidism or hyperthyroidism. Included with your purchase, if your test results are abnormal, an independent physician may be able to provide you with treatment options. Read more

Test details

Sample type:

Blood

Preparation:

No special preparation is required.

Test type: In Person

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$44.10 ~~$49.00~~

+ $6.00 Physician Service Fee

Quantity

About the test

Noticeable changes in your metabolism (eg, weight, temperature, and energy) may be an indication of abnormal levels of thyroid stimulating hormone (TSH) in your blood. This thyroid function test measures the TSH levels in your blood to help identify these abnormalities. High TSH levels may indicate an overactive thyroid (ie, hyperthyroidism), while low TSH levels may suggest an underactive thyroid (ie, hypothyroidism). In either case, T4 reflex testing will be performed at no additional cost to help identify a possible thyroid disorder.

The thyroid is a butterfly-shaped gland in the front of the neck. Thyroid function is controlled by the pituitary gland, which produces TSH and releases it into the bloodstream. TSH stimulates the thyroid gland to produce thyroid hormones (T3 and T4). TSH will also tell the body to make or release thyroid hormones. This process determines how quickly your body uses energy, makes proteins, and controls other important functions, such as: body temperature, heart rate, breathing, skin moisture, muscle contraction, weight gain or loss, brain development, cholesterol levels, menstruation, and nervous system function.

Thyroid disorders can affect any system of your body and treatment will depend on the specific thyroid condition. An undiagnosed thyroid disorder may put you at risk for cardiovascular diseases, osteoporosis, infertility, and other serious conditions; most thyroid conditions can be managed with medication.

Buy your own thyroid function test online with Quest. No doctor’s visit is required – simply purchase TSH testing, visit a nearby Quest® location for sample collection, and get fast results. Included with your purchase, if your test results are abnormal, an independent physician may be able to provide you with treatment options.

This thyroid function test may be right for you if any of the following are true:

You have a risk factor of thyroid disease:
- Family history
- Older age (over 50)
- Female
- Recent pregnancy
- History of thyroid surgery
- Radiation treatment for past thyroid
- Taking medication high in iodine
- Diagnosed with an autoimmune disease
You are experiencing signs or symptoms of thyroid disease (see Signs & symptoms section below)

The thyroid function test measures the level of TSH in the blood to help evaluate thyroid function. The pituitary gland detects thyroid hormones in the blood. If the thyroid is making a lot of these hormones, the pituitary will stop producing TSH, leading to low levels of TSH. Low TSH may mean the thyroid gland is overactive, commonly referred to as hyperthyroidism. High levels of TSH in the blood may indicate the thyroid gland is not working hard enough, causing the pituitary to keep making TSH. High TSH can indicate an underactive thyroid gland, commonly referred to as hypothyroidism. Both conditions may require medical treatment.

*Testing TSH is the initial step. If test results identify abnormal TSH levels, free thyroxine (T4) blood levels will be tested using your submitted sample at no additional cost to you to provide information needed to help diagnose hypothyroidism.

Symptoms of thyroid disorders can be mild, moderate, or severe and often resemble other medical conditions. You may consider getting a thyroid function test if you're experiencing the following symptoms:

Hypothyroidism (underactive thyroid) symptoms can include:

Weight gain
Fatigue
Increased sensitivity to cold
Thinning hair
Enlarged thyroid gland (goiter)
Muscle aches and pains
Joint pain and stiffness
Elevated cholesterol levels
Constipation
Depression
Problems with memory
Slower than normal heart rate
Dry skin
Muscle weakness
Facial puffiness
Hoarseness

Hyperthyroid (overactive thyroid) symptoms can include:

Increased appetite
Irregular heartbeat
Palpitations—a fluttering or pounding heartbeat
Unintentional weight loss
More frequent bowel movements
Anxiety or nervousness
Sweating

You must be 18 years of age or older to purchase a test on questhealth.com. This test requires specimen collection at a Quest Diagnostics location or through Quest Mobile™, a convenient option for in-home sample collection*. Collection not available in AK, AZ, or HI.

*Check your zip code here for service availability, not available in all locations.

No special preparation is required.

After the test:
After you provide your specimen, it generally takes few business days to process and release your test results. However, processing times may vary. Your test results will be available in a clear and easy-to-read report. If your results differ from expected ranges, you may receive an alert call from an independent healthcare coordinator. Independent physicians are available to discuss questions or concerns you may have regarding your results.

Treatment options:
Included with your purchase, you have the option to discuss your results with an independent physician who may be able to prescribe menopause-symptom and/or hypothyroidism specific treatment depending on your results.

If your thyroid (TSH) lab result is abnormal or out of expected range, the lab will perform an additional test (free thyroxine, T4) on the sample you have already provided at no extra cost to you. This additional testing can provide additional diagnostic information to help with care.

How it works

questhealth.com offers 100+ consumer-initiated Quest Diagnostics lab tests to empower you to have more control over your health journey. Choose from a variety of test types that best suit your needs.

In-person
In-home sample collection

Buy a lab test

No doctor visit is required for purchase.

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Register your test
& schedule an appointment

Book a visit to one of 2000+ Quest locations.

Visit Quest for sample collection

Complete your test sample collection during your scheduled appointment.

Get fast results

Access results online as soon as they’re available. You will be emailed when they are ready. Discuss your results with an independent physician at no extra cost. Treatment options may be available.

Buy a lab test
+ in-home sample collection

No doctor visit required for purchase. If in-home service is available in your area, purchase for an additional $79 fee.

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Register your test
& schedule an appointment

After you make a purchase, register your test and Quest Mobile will contact you to schedule an in-home sample collection appointment.

In-home sample collection

A Quest Mobile phlebotomist will collect your sample and deliver it to Quest Diagnostics.

Get fast results

Access results online as soon as they’re available. You will be emailed when they are ready. Discuss your results with an independent physician at no extra cost. Treatment options may be available.

This guide covers key information about how to get tested for thyroid disorders, including symptoms, available tests, and how to interpret results.

Thyroid disorders can affect men and women of all ages. Getting tested is important, especially for those with a family history, as undiagnosed thyroid disease can contribute to infertility, sexual dysfunction, osteoporosis and heart disease.

TSH is essential for regulating the menstrual cycle and ovulation. Too much or too little TSH can disrupt the menstrual cycle, cause estrogen and progesterone imbalances, and lead to ovulation problems and difficulty getting pregnant. Read our article to learn more about essential hormones and how they affect fertility.

FAQs

How common is hypothyroidism?

About 5 percent of Americans who are 12 years old or older have hypothyroidism. Many people who have hypothyroidism are unaware.

Which thyroid disorder is most common, hypothyroidism or hyperthyroidism?

Hypothyroidism is more common.

How often should I have my thyroid function checked?

Currently, there is no evidence to support routine screening of your thyroid function. You may consider checking your thyroid function if you are having symptoms of a thyroid disorder or if you are at high risk for developing a thyroid disease.

If you have been diagnosed with a thyroid disorder, you may have your thyroid function checked more frequently. Consult with your healthcare provider to determine a longer-term care plan.

Are there risk factors to be aware of for developing thyroid disease?

Even if you don’t have symptoms, you may consider testing if you have the following risk factors:

• Family history of thyroid disease
• Women
• People over age 50
• Have an autoimmune disease such as type 1 diabetes
• History of thyroid surgery
• Radiation treatment for a past thyroid condition
• Recent pregnancy
• Taking medication high in iodine

Can I use my FSA or HSA funds to purchase tests at questhealth.com?

You may be able to use your FSA or HSA funds to purchase lab tests at questhealth.com. Please review your FSA/HSA plan or check with a tax professional to confirm specific requirements for individual eligibility.

Tests purchased on questhealth.com are only for individuals who intend to pay directly for testing and do not want to submit a claim for reimbursement under their health insurance.

Thyroid TSH Function Test