“It’s probably just stress.”
If you’ve heard that and still feel something is off, you don’t have to walk into your next appointment with only symptoms to describe.
The NfL blood test measures a biomarker associated with nerve cell injury — an objective number you and your provider can look at together.
Order Test — $350Insight, not a diagnosis. NfL is not specific to one condition.
One-time, self-pay. No insurance. Physician-authorized order, blood draw at Labcorp, secure results typically in 2–4 days after the draw.
Backed by iHLTH’s clinical teamAvailable in participating states; excludes NY, NJ & RI
What this is: one data point. It does not diagnose any condition. Here’s exactly what it can and can’t tell you.
What's included
One flat price. Everything you need for this test.
Instructions and paperwork are emailed after your order is prepared — do not go to Labcorp until you receive them.
NfL blood test
Neurofilament Light Chain measurement — a biomarker associated with nerve cell injury.
Physician-reviewed order
A licensed physician reviews and authorizes your lab order before it goes to Labcorp.
Labcorp draw access
Visit a Labcorp patient service center for a standard blood draw — no separate lab bill for this order.
Secure results delivery
Your results are delivered privately once available, ready to review with a qualified provider.
How it works
Four simple steps, start to results
Important: wait for your email before visiting Labcorp
Do not go to Labcorp until you receive and review your emailed instructions and paperwork. Going before then means Labcorp will not have your order on file.
Stop biotin supplements at least 72 hours before collection.
- 1
Order online
Choose the NfL Blood Test and complete private self-pay checkout.
- 2
Receive instructions
We prepare your paperwork and email your Labcorp instructions.
- 3
Visit Labcorp
Bring your paperwork to Labcorp for a standard blood draw.
- 4
Get secure results
Results are delivered privately — review with a qualified provider.
Private, physician-reviewed, and priced upfront at $350.
Order Test — $350Why trust us
Serious testing, delivered with care
Backed by iHLTH’s clinical team.
Backed by iHLTH, founded by Dr. Eva Imperial, MD
LabTestsOnDemand is a proud sister company to iHLTH, a physician-led health platform founded by Dr. Eva Imperial, MD. We share a commitment to reliable health insights delivered with exceptional patient care — the same trusted clinical expertise stands behind every order.
Learn more about Dr. Imperial and iHLTHPhysician-reviewed orders
Every lab order is reviewed and authorized by a licensed U.S. physician before it reaches Labcorp.
Labcorp blood draw
You complete your draw at a Labcorp patient service center — the same national lab network trusted by clinics nationwide.
Upfront, honest pricing
One flat self-pay price. No surprise Labcorp bill for this order. No insurance middlemen.
Private & secure
Your order and results are handled privately. Results are delivered through a secure channel — not left in a voicemail.
CLIA-certified laboratory
Every sample is processed in a CLIA-certified laboratory, the U.S. standard for clinical lab quality.
200,000+ customers served across the iHLTH family
Join the 200,000+ customers who have used the iHLTH family of services for private, self-pay lab testing.
Our guarantees
No Lost Lab Results
If results are lost during our order process, we’ll cover the repeat lab so you don’t pay a second time.
Price Match Guarantee
If Labcorp’s own self-pay price for the same test is lower, we’ll refund 110% of the difference. See terms of service for details.
No Surprise Billing
We handle lab billing directly on this order. If any billing discrepancy comes up, our team resolves it — not you.
“The instructions were clear and the Labcorp visit took ten minutes. Getting a real data point without waiting months for a referral was worth every dollar.”
“I wanted something private before talking to my neurologist. Ordering online and getting results back securely made a hard conversation easier.”
Choose your starting point
What do you want to understand first?
Tap a card to see a short answer. Nothing here is a diagnosis.
Choose your concern
Choose the concern that fits you best
Learn more, at your pace
Optional details if you want to learn more
The key ordering details are above. These sections are here if you want more context before deciding.
Questions before you order? We're here to help.
Chat with usBefore you order
Important questions, answered up front
Ready when you are — $350, no hidden fees.
Order Test — $350Watch: how ordering works
A short walkthrough of the process
In the meantime, the four-step "How it works" section above covers the same flow.
More questions
Everything else, in one place
One private data point. One flat price. No hidden fees.
Order Test — $350Take a private next step today
Order privately, complete your blood draw at Labcorp, and bring more information into the conversation with your healthcare provider.
Private self-pay. Labcorp blood draw. No insurance billing by LabTestsOnDemand. No hidden fees.
This page is for informational and ordering purposes only and is not a substitute for medical advice, diagnosis, or treatment. This test does not detect, diagnose, treat, cure, or prevent any disease. Results should be reviewed with a qualified healthcare provider.