TRAb (TSH Receptor Antibody)

CPT: 86800
Thyroid

What This Test Measures

Detects antibodies to TSH receptor (stimulating or blocking); used for Graves' disease diagnosis.

Preparation

No fasting required
If taking T3 medication (liothyronine/Cytomel), draw at least 12–24 hours after your last dose for an accurate TSH. If splitting T3 doses, draw at your natural trough. Biotin supplements — even in multivitamins — can falsely skew thyroid results: discontinue at least 2 days before testing. No fasting required unless combined with other tests.
💬 Patient Community Notes

No special timing required for TRAb itself, but if drawing alongside thyroid hormones, follow the standard thyroid timing: take meds as usual the day before, draw first thing AM before that day's dose. The thyroid community notes that TRAb helps differentiate Graves' disease from other causes of hyperthyroidism. These notes reflect common practices in thyroid patient communities.

Reflects common practices in thyroid, BHRT, and functional medicine communities. This may differ from standard clinical guidelines. Not medical advice — always discuss with your provider.

General guidelines only. Requirements vary by lab and individual. Confirm with your provider before adjusting any medications.

Turnaround Time

Varies by lab

Clinical Notes

Includes stimulating and blocking variants; some labs separate TSI from blocking TRAb

ICD-10 Codes

Common diagnosis codes associated with this test. Codes are assigned by your provider.

E03.9Hypothyroidism, unspecified
E05.90Hyperthyroidism, unspecified
E06.3Autoimmune thyroiditis
R53.83Other fatigue
Z79.899Other long term drug therapy

Self-Pay Pricing

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Life Extension

Uses Labcorp network; known for supplement company; competitive lab test pricing

$31.00Order
Walk-In Lab

Uses both Quest and Labcorp networks; competitive pricing; broad test selection

$39.00Order
HealthLabs.com

Uses Quest and Labcorp; strong panel bundling; results in 1-3 days

$39.00Order
Request A Test

Uses Quest and Labcorp networks; offers both individual tests and discounted panels

$49.00Order
Ulta Lab Tests

Uses Quest Diagnostics network; generally lowest DTC prices; not available in NY, NJ, RI

$152.95Order

Lab Codes

Proprietary codes used by each lab for this test.

LabCorp
086280(order)
Quest Diagnostics
16381(order)

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Related Tests

TSH (Thyroid Stimulating Hormone)

CPT: 84443

Free T4 (Thyroxine, Free)

CPT: 84439

Free T3 (Triiodothyronine, Free)

CPT: 84481

Reverse T3 (rT3)

CPT: 84482

Free T4 Index (T7)

CPT: 84479, 84436

Thyroid Panel with TSH

CPT: 84436, 84443, 84479

For informational purposes only

This page is for educational and research purposes only and does not constitute medical advice, diagnosis, or treatment recommendations. ICD-10 and CPT codes are assigned by your healthcare provider. Always consult a qualified healthcare provider before ordering any lab test or making decisions about your health.