The short answer
QuantiFERON-TB blood test — more accurate than the skin test with no return visit needed, measured from a standard blood draw. At TestWell it costs $91.99 plus a $6 lab fee, needs no fasting, and results post in 3–5 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$350
cash pay
Other Labs
$149
+ lab fees
TestWell
$91.99
+ $6 lab fee
Have symptoms? See a clinician instead of testing.
If you have a cough lasting 3+ weeks, are coughing up blood, or have fever, night sweats, or unexplained weight loss, the right step is a clinical evaluation now — not ordering a test and waiting. A negative blood test does not rule out TB disease in someone with symptoms. Also: if you've had a documented positive TB test before, don't retest — bring your prior result to a clinician instead.
The QuantiFERON-TB Gold Plus blood test measures your immune response to Mycobacterium tuberculosis. Unlike the traditional skin test, it requires only one visit, is not affected by prior BCG vaccination, and has fewer false positives. It's required for many employment, school, and immigration purposes. A positive result indicates TB exposure but does not distinguish between latent and active TB infection.
Interferon Gamma Release Assay (IGRA) — modern blood-based tuberculosis test. More specific than the older skin test (TST/PPD) because it isn't affected by prior BCG vaccination.
Healthcare workers (annual screening), anyone starting biologic medications (TNF-alpha inhibitors, JAK inhibitors), recent immigrants from high-TB-prevalence countries, anyone with known TB exposure, school/employment requirements.
Sample Type
Blood draw
Fasting
Not required
Results In
3–5 business days
Performed At
Quest or Labcorp
1 biomarker tested
Your Tuberculosis (TB) Blood Test results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–5 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
No fasting required. Sample must be processed within 16 hours of collection.
The short answer
Yes when someone requires TB documentation from you - a university, employer, or your own preparation ahead of an immigration medical exam - or after a known exposure. The QuantiFERON blood test needs one visit, is not skewed by childhood BCG vaccination, and produces the CLIA-certified report institutions accept.
We would rather you order the right test than the most expensive one.
This is a walk-in venous draw at Quest or Labcorp. QuantiFERON samples must be processed within about 16 hours of collection in special tubes, which is why it is not a mail-in kit and why we route it through lab locations that handle it daily. No fasting or preparation - walk in any time.
An at-home draw is not recommended for this test — it needs a lab-based collection to be accurate.
The markers that matter most and what an out-of-range value can mean. Reference ranges vary by lab, age and sex.
| Marker | Typical range | What it means |
|---|---|---|
| QuantiFERON-TB Gold Plus (IGRA) | Negative | Negative means no immune memory of TB bacteria - the result schools and employers are looking for. Positive means exposure at some point (roughly 1 in 4 people worldwide), NOT active disease; the next step is a chest X-ray to rule out active TB, and latent TB is treatable with a short antibiotic course. |
This section medically reviewed by Youmna DiStefano, MD — updated July 2026. General health information, not medical advice; interpret results with a qualified clinician.
A Tuberculosis (TB) Blood Test test costs $91.99 at TestWell — $97.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Ordered directly from the labs' own consumer sites, the same test lists at $149.00 at Quest Health and $149.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $350.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest or Labcorp) | $91.99 | $97.99 | Includes the one $6 lab processing fee, charged once per order |
| Quest Health (Quest Diagnostics' own site) | $149.00 | $149.00 | list price checked Sep 12, 2026 |
| Labcorp OnDemand (Labcorp's own site) | $149.00 | $149.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $350.00 | $350.00 | Reference figure; hospital charges vary widely by facility and are often higher |
34% less than the lower lab-direct list price, for the same draw at the same lab. Lab test codes: Quest test code 36970 · Labcorp test no. 182879 · BioReference code T814-3. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Related guide
TB Blood Test vs. Skin Test: How QuantiFERON (IGRA) Works and Which One You Need
Related guide
TB Test for University Enrollment: The Fast Way to Clear Your Health Hold
TestWell Price
$91.99
+ $6 lab processing fee at checkout
Have symptoms? See a clinician instead of testing.
If you have a cough lasting 3+ weeks, are coughing up blood, or have fever, night sweats, or unexplained weight loss, the right step is a clinical evaluation now — not ordering a test and waiting. A negative blood test does not rule out TB disease in someone with symptoms. Also: if you've had a documented positive TB test before, don't retest — bring your prior result to a clinician instead.
No insurance needed · HIPAA compliant
Better value: the Immigration Exam Prep Panel
Save $24.98This test is part of the Immigration Exam Prep Panel — 3 tests · 5 biomarkers for $159.99, $24.98 less than à la carte.
$159.99$184.97
3 tests · 5 biomarkers
Frequently ordered together
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Tuberculosis (TB) Blood Test
$91.99