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Thyroglobulin Antibody, Serum (Screening)

Published: August 9, 2026Updated: August 16, 2026

This test checks for antibodies that may indicate an autoimmune response targeting thyroid hormones, often linked to conditions like Hashimoto’s thyroiditis or post-thyroid cancer treatment.

Quick summary

["Helps monitor autoimmune thyroid issues or detect hidden thyroid problems after treatment."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
15210-8
Short code
Thyroglob Ab Ser Ql
Synonyms
Thyroglob Ab Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Autoimmune diseases like Hashimoto’s thyroiditis can cause the immune system to mistakenly attack thyroid cells, producing antibodies such as thyroglobulin antibodies. This test screens for these antibodies in your blood to identify potential autoimmune activity without measuring thyroid hormone levels directly.

What to Expect Before the Test

No special preparation is needed. You’ll have a small blood sample drawn from your arm, similar to other routine blood tests. The test is quick and typically done in a doctor’s office or lab.

What the Results Mean

A positive result suggests the presence of thyroglobulin antibodies, which may warrant further evaluation by your healthcare provider. They may recommend additional tests or monitoring to understand the cause and guide treatment.

Common Conditions Linked to Positive Results

Positive results are often seen in autoimmune thyroid conditions, such as Hashimoto’s thyroiditis, or after thyroid surgery or radioactive iodine treatment for thyroid cancer. These antibodies may indicate ongoing immune activity or residual thyroid tissue.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Thyroglobulin Antibody Screen

Frequently asked questions

What does a positive result mean for my thyroid health?
A positive result means your body is producing antibodies against thyroglobulin, which could suggest an autoimmune response or lingering thyroid tissue. Your doctor will discuss next steps, such as further testing or monitoring, to understand the cause and next actions.
Can I fast before this test?
No fasting is required for this blood test. However, always follow your healthcare provider’s instructions for any general test preparations.
How often will I need this test?
Frequency depends on your medical history and treatment plan. If you’ve had thyroid cancer or autoimmune thyroid disease, your doctor may recommend this test periodically to monitor your condition.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy