Lab Tests for Graves' Disease
Graves' disease is an autoimmune disorder that causes your thyroid to produce too much hormone (hyperthyroidism). It is the most common cause of hyperthyroidism in the United States. Lab testing for Graves' disease focuses on confirming overactive thyroid function and identifying the autoimmune trigger. The Graves-specific markers are thyroid-stimulating immunoglobulin (TSI) and TSH receptor antibodies (TRAb), the antibodies that switch the thyroid on; together with TSH, Free T4, Free T3, and TPO antibodies, they give a clinician a comprehensive picture. JustLabs lets you order these tests online without a doctor visit at transparent, affordable prices.
Recommended Tests
Includes 3 of the 7 recommended tests below (not included: TSI, TRAb, TPO Ab, TG Ab).
All 7 recommended tests
$215 + one $18 order fee = $233 all-in
Understanding Your Results
| Test | Normal Range | Low Means | High Means |
|---|---|---|---|
| TSH | 0.40–4.50 mIU/L | Overactive thyroid — consistent with Graves' | Unlikely in active Graves' disease |
| Free T4 | 0.8–1.8 ng/dL | Thyroid function may be normalizing | Excess hormone from Graves' stimulation |
| Free T3 | 2.3–4.2 pg/mL | Less common in active disease | Often the first hormone elevated in Graves' |
| TSI | <140% of baseline | Graves' less likely (can be negative in very mild disease) | Thyroid-stimulating antibodies present — supports Graves' |
| TRAb | ≤2.00 IU/L | Graves' less likely (can be negative in very mild disease) | With hyperthyroidism, strongly supports Graves' |
| TPO Antibodies | <35 IU/mL | Autoimmune component less likely | Supports autoimmune thyroid diagnosis |
How to Order
Order Online
Select your tests and pay securely. A licensed physician authorizes your order.
Visit Quest Diagnostics
Walk into any of 2,200+ Quest locations nationwide. No appointment needed.
Get Results
Results available in your account within 1-2 business days.
Frequently Asked Questions
Related Conditions
Related Articles
How to get TSH, Free T4, and Free T3 tested affordably without insurance coverage.
Why Free T3 matters for thyroid health and when to add it to your panel.
A breakdown of every thyroid marker and what each one tells you about your health.
Content reviewed for accuracy by the JustLabs editorial team.