Everyone 18 or older—except those who are currently pregnant. Start now to see where your health stands—and where it’s headed.

Function was founded in the US and is based in Austin, Texas.

Function is offered in labs across 48 states (but not yet Rhode Island, Hawai'i, or Puerto Rico).

We’ve lived the gaps in traditional healthcare—the delays, the dismissals, the reactive model that waits for symptoms. So we built Function with the world’s top doctors to put you in control. This is about catching potential issues early, when you can still do something about them. You deserve a deep view of your health as it evolves. More time with the people you love. More moments that matter. Function exists to help make 100 healthy years a reality.

Testing now can help you keep feeling your best—and catch small signals that could turn into bigger problems down the line. For example, heart disease can build for decades. Cancer can be silent until later stages.

Most doctors wait for symptoms to show up before ordering many of these tests. Function gives you a deeper view now—so you can spot trends, catch changes early, and stay ahead.

No, Function doesn’t replace your doctor—it makes you a more powerful patient. With 100+ lab tests annually (5x more than the average physical) and advanced scans, you’ll walk into appointments with a clearer picture of your health to share. Doctors may come and go, but Function was designed to stay with you for a lifetime.

After signing up, log in to Function to easily schedule your lab visit at one of over 2,000 Quest Diagnostics locations nationwide at the time that works for you.

We partner with Quest Diagnostics for easily accessible labs (2,000+ locations across the US) and results trusted by the nation’s medical community. Find a quest near you.

About 15 minutes. That’s it.

At least twice a year. Your membership includes 100+ lab tests as part of your Annual Test, then 60+ labs for your Mid-Year Test to see what’s changed. You can test any biomarker on demand anytime for an additional member-only cost.

Many members can complete their Annual Test in a single lab visit. But members with an active menstrual cycle will need 2 separate visits for accurate hormone results. Members in Arizona also require 2 visits because of state processing rules. We will walk you through any details that apply to you during scheduling.

Go to “Get Tests” then select “Schedule Lab Tests.” From there you can purchase Add-Ons or a re-test of any biomarkers.

Yes. You must use your Mid-Year Test before your annual renewal. It includes 60+ biomarkers to track changes over time and doesn’t roll over.

In your dashboard, select the arrow next to the upcoming visit you'd like to reschedule and choose the "Reschedule" option.

Membership includes 100+ lab tests across every major organ system—selected by the world’s top doctors to monitor for thousands of diseases. And 60+ tests halfway through the year to see what’s changed. Hormones, heart, thyroid, nutrients, metals, metabolism, autoimmunity, liver, and inflammation—what others skip, we don’t. If it impacts your future, we test it.

Advanced Add-Ons like Galleri and MRI and CT scans are available for an additional cost. See the full list of tests.

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Our doctors—including Function’s Chief Medical Officer Mark Hyman, M.D.—hand-picked every test based on the latest science around disease detection and long-term health impact.

Anything less could miss critical parts of your health. Typical physicals tend to focus on conventional standards—and what insurance will cover. This broader view can give you key insights to take action sooner.

Function uses medical-grade lab tests that meet the highest clinical standards. All samples are processed at Quest Diagnostics labs by licensed technicians. That’s why we don’t offer at-home test kits. They risk sample integrity and can’t support our detailed testing.

Most labs charge high prices because insurance companies negotiate them down. If your insurance doesn’t pay, you’re stuck with the bill. The 100+ tests included in your membership could cost over $15,000 elsewhere—but we’ve made them accessible. Because health shouldn’t come with a surprise bill.

Add-On Tests help you dig even deeper into your health. Choose them based on your goals or risk factors, like the Galleri Multi-Cancer Detection Test. Available for an additional cost. See the full list of tests.

Function gives you access to lab tests that measure key biomarkers tied to metabolic health—including Hemoglobin A1c and Insulin.

Function goes beyond the standard lipid panel and includes advanced biomarkers like Apolipoprotein B, Lipoprotein A, and Lipoprotein Particle Size. These can help you catch red flags early when traditional tests don’t.

Yes. Function includes a detailed set of thyroid biomarkers, including TSH, T3, and T4.

Mercury and lead are included in your membership. You can also access Add-On Tests for arsenic and aluminum.

Yes. Members can add on the Galleri Multi-Cancer Detection Test, which looks for signals of 50+ cancers, as early as Stage 1.

Function gives you access to an Add-On Test for Apolipoprotein E (ApoE), a biomarker tied to risk of Alzheimer’s.

Yes. Function has Add-On Tests to look for signs of food and environmental allergies.

Yes, you can access testing for chlamydia, herpes, and more through Add-On Tests.

Function tests major fertility hormones such as FSH (follicle-stimulating hormone) and LH (luteinizing hormone) in both men and women. If you have a regular period, you’ll want to test on day 3 of your cycle for the clearest snapshot. Function gives you fertility-related data—but it doesn’t make clinical calls. Talk to your doctor to interpret the results and decide what to do next.

We’ll still help you test key biomarkers like AMH, TSH, and Free T3/T4. But we don’t run biomarkers that are likely to be skewed—like FSH, LH, and Estradiol—since birth control can interfere with those results.

Some health questions need multiple biomarkers for a more complete picture. That’s why some Add-Ons include grouped biomarkers.

Both illnesses and vaccines can temporarily raise inflammation biomarkers like hs-CRP. For the most accurate read, we recommend waiting at least 2 weeks after vaccination before testing.

Yes—fast for 8 hours before your test. It helps ensure accurate results for key biomarkers. Stay well-hydrated, too. It makes blood draws smoother and improves urinalysis accuracy.

Yes. Morning labs give the most accurate read on hormones like testosterone and cortisol.

No. Never stop taking medications without talking to your doctor first.

Biotin (Vitamin B7) can interfere with hormone and thyroid markers. Some people choose to pause it 72 hours before testing.

Yes—avoid seafood for 48 hours before tests that check for heavy metals like mercury.

About 35 mL. For comparison, a typical blood donation is around 500 mL. Pro tip: Hydrate well. It makes the draw easier and faster.

No worries, your phlebotomist is trained and experienced. Just let them know if you’ve fainted in the past. Blood draws are generally safe and there is very little risk.

Not at this time. Many biomarkers shift during pregnancy, making the results harder to interpret.

If you are cycle-syncing, you can test after 2 full menstrual cycles postpartum.

Your results are delivered as soon as they are available—some within a few days. The full set will be delivered within 3-4 weeks. Once all results are in, a clinician reviews them and adds a written summary to help you understand the bigger picture. This happens within 1–2 weeks.

Yes. Every result comes with explanations created by top doctors and built on thousands of hours of research—so you’ll actually understand what your numbers mean. You’ll get action items and a clinician’s full summary.

Insights are tailored to your unique results. They’re sourced from a group of the world’s top doctors—including Function’s Chief Medical Officer, Mark Hyman, M.D. All insights are grounded in peer-reviewed scientific studies from trusted sources like the NIH, JAMA, and NEJM.

If any result is critical, a healthcare provider will call you right away.

Yes. Once your results are ready, you can log in and download them as a PDF to share with your healthcare provider.

Great. Upload your results to Function so you can track everything in one place over time.

Your body is always changing—testing twice a year helps you stay ahead. Most labs offer a single snapshot. Function gives you a personal baseline with over 100 tests annually and 60+ tests mid-year, so you can track progress and take action as things shift.

Yes. Biomarkers shift with your lifestyle, stress, diet, and sleep. Regular testing shows what’s changing—and gives you the power to act on it.

Rarely—but it happens. Being dehydrated or forgetting to fast, for instance, could impact your results. If you or your doctor suspect a false result, we encourage you to retest.

Yes. You can log into Function and connect supported apps to sync your health data—all in one place. Head to “Connected Apps” after logging in to get started.

Anyone who wants to take a proactive approach to their health.* Cancer, evidence of fatty liver, aneurysms, and structural brain changes often appear in places lab tests alone may not be able to detect. Imaging fills that gap—offering a deeper look at what’s happening inside your body.

*Certain individuals should not receive MRI or CT scans, including those who are under 18, pregnant, have metal implants (e.g., pacemaker, prosthetic devices), have had a recent cancer diagnosis, or are undergoing active cancer treatment. For a full list of exclusions, contact us at hello@functionhealth.com.

MRI scans are traditionally expensive and hard to access. Function makes it simple and affordable—starting at $499 for an MRI scan.

No. Your Function membership unlocks access to purchase scans as an Add-On. You decide when it’s right for you.

Scans are available at imaging centers across the US. Availability varies by location, but you’ll see what’s offered near you when scheduling, and we’re expanding fast.

MRI stands for magnetic resonance imaging. An MRI machine uses a giant magnet that uses electromagnetic and radio waves to take detailed pictures of the structures inside your body.

CT stands for computed tomography. A CT scan uses a combination of X-rays and computer technology to take pictures of structures inside your body. Low-dose CTs use much less ionizing radiation (approx. 2 millisieverts, mSv) than a regular CT. The amount of exposure is generally considered safe and is FDA-cleared and approved.

Our MRI scans don’t expose you to harmful ionizing radiation. MRI uses magnets and non-ionizing radiation, and is considered safe, effective, and not associated with adverse health outcomes. Our Heart & Lungs CT Scan is a low-dose CT that meets American College of Radiology guidelines and delivers far less radiation (approx. 2 millisieverts, mSv) than a standard chest CT without compromising image quality.

The MRI Scan takes ~22 minutes and is available to Function members for $499. It is the most affordable, time-efficient way to get an advanced view of your body’s organs and structures. It looks at your head, neck, abdomen, and pelvis. It can help scan for hundreds of potential conditions, including cancers of the brain, thyroid, liver, gallbladder, pancreas, spleen, kidneys, adrenal glands, bladder, ovaries, uterus, and prostate. Also scans for signs of stroke, sinus inflammation, fatty liver, gallstones, uterine fibroids, kidney stones, and abdominal aortic aneurysm.

The MRI Scan with Spine takes ~47 minutes and includes everything in the MRI Scan, plus targeted spine coverage to screen for spinal lesions and tumors, herniated discs, cervical spinal stenosis, spondylosis, fractures, scoliosis, arthritis, and other degenerative changes, relevant for people who may be experiencing lower back pain, sciatica, or disc degeneration.

The MRI Scan with Skeletal & Neurological Assessment is 2 sessions of about an hour each, and includes everything in the MRI Scan with Spine, plus scans for signs of neurodegeneration in the brain and narrowing in the arteries of the head and neck with the magnetic resonance angiogram (MRA) included with the scan, and provides a brain age analysis. It also includes body composition assessment (fat and muscle volume), hip evaluation (labrum, cartilage, and joint health), and knee scans (for meniscus, ACL, and MCL injuries).

The Heart & Lungs CT Scan takes ~3 minutes. It is a single low-dose chest computed tomography (CT) scan that can help screen for signs of lung cancer, pulmonary nodules, emphysema, and more. After the scan, advanced AI analysis of the images—performed remotely—assesses plaque buildup in the coronary arteries of the heart and provides a numerical coronary artery calcium (CAC) score to help evaluate the risk of heart disease.*

*In some cases, natural heart movement or rhythm during the scan can prevent the AI technology from calculating a CAC score, in which case a refund for the heart portion will be provided.

We use noncontrast MRI scans, which are not ideal for heart-specific imaging. However, our Heart & Lungs CT Scan offers an effective way to estimate the plaque burden in your coronary arteries and provide a numerical calcium score to help assess your heart disease risk. Breast imaging with MRI requires the use of specialized breast coils and IV contrast, both of which are not used in our scans. However, Function members can access the Galleri Multi-Cancer Detection Test as a tool to detect signals that may point to potential breast cancer.

These tests can work together. The Galleri test looks for cancer signals (ctDNA, circulating tumor DNA) in your blood; whereas Function scans take an imaging approach to cancer detection to “visualize” tumors in the body. Two views, one goal: providing more insights, earlier.

MRI scans usually require little preparation. You may take your daily medications and eat normally, unless instructed otherwise during your scheduling process. The Heart & Lung CT Scan may require you to avoid food for at least 3 hours before your scan. Fluids are usually OK, but a medical provider at the scan facility will also guide you if that needs to be restricted. For patients receiving the coronary artery calcium (CAC) score, we recommend restricting caffeine/coffee to keep heart rate from interfering with results. Metallic objects interfere with imaging, so remove them from your body before your scan.

We recently acquired Ezra, the team behind our FDA-cleared imaging AI. We’re actively working to bring everything into Function, so we’re using Ezra’s site to make scans available now—no delays.

Results are ready in 7–10 business days and delivered to your Ezra account. You'll get an email as soon as they're available. Soon, you’ll also be able to view them in your Function account so all results are in one place.

Yes. Check with your plan to confirm eligibility. We’ll provide you with a receipt that you can submit to your HSA/FSA plan.

Function membership is $499 per year. One flat price for a deep-level view of your health as it changes. Because making advanced testing accessible is the right thing to do.

No. There’s just one Function membership. Once you join, you unlock access to member-only Add-On Tests—like the Galleri Multi-Cancer Detection Test by GRAIL, brain health tests, environmental toxin tests, and more. One membership. A vault of powerful tests, available when you need them.

No—Function is 100% insurance-free. No deductibles, no co-pays, no surprise bills. Just transparency.

Yes—check with your plan to confirm eligibility. Members receive an itemized receipt to submit for reimbursement.

Not at this time. Function is built to be a lifelong way to manage your health.

Yes, anytime.

Function does not offer refunds for prior payments.

Testing in New York and New Jersey can cost more due to state regulations. We will walk you through any details that apply to you during scheduling.

Message us through our member chat—we’re here to help. While we don’t offer medical advice, Function provides clear explanations for each biomarker, potential reasons behind out-of-range results, and insights to help you take action. Need urgent help during a lab visit? Reply to the text reminders you received before your visit for support.

Start on our website — it's the fastest way to connect. You can also email us: General inquiries: hello@functionhealth.com Billing questions: membership@functionhealth.com

We take privacy extremely seriously. Function uses the latest security tools and internal protocols to protect your data from unauthorized access or disclosure. We can’t secure any information you choose to share yourself or ask us to release, so we recommend carefully considering before sharing this data. Read our Privacy Statement.

Yes. Your Function data is encrypted and protected to HIPAA standards. Only you decide who can see it. We never sell or share your information.

Only you, our lab partners, clinicians, and essential administrators can access your results. In some cases, results may also be shared with state health authorities to support public health efforts, as required by law.

It lets us share tools or insights tailored to you—no spam, just what matters. We need your permission before using your health data for any marketing. It’s the law and it’s the right thing to do.

You’ll only hear from us occasionally, and only when it’s relevant. That means tools, insights, or product features based on your unique health data—things we genuinely think could help. We don’t do spam.

Yes. Your health data is yours to control, and you can delete it at any time. Note: Deletion is permanent, and we won’t be able to recover the data once it’s gone.

Yes—and it might be the most meaningful gift you give. Health isn’t just personal—it’s something we share with the people we love. First purchase the membership in their name. Then they’ll set up their account and schedule their lab visit.

Yes, as long as they are 18 or older. It’s a powerful way to help them invest in their future health. Buy the membership in their name, and they’ll create their account and schedule their lab visit.

If you're an active Function member (and not a licensed healthcare practitioner), you’re in. Questions? Email referals@functionhealth.com.

Log in to your account and click “Refer Friends” to share your link.

Yes. Earn $100 for every new member who joins Function through your link and stays for 60+ days. Want to see the fine print? See Section 20 of our Terms of Service.

No cap. We want everyone to own their health. ‍

Referral fees are paid by direct deposit through our partner, Impact. Add your payment info to get started.

Share your link with anyone you want to join Function—friends, family, your group chat. ‍

Licensed healthcare professionals aren’t eligible for referral fees due to regulations. But you can still share access. Submit your info here and we’ll be in touch.

No—gift purchases aren’t eligible for referral fees.

If you’re passionate about helping people take charge of their health, we’d love to hear from you. Get started.

We make it easy for people to share their lab results with providers and practitioners. If you’re interested in gaining access, enter your information here.

Function for Work is easy to roll out and built to make a real impact—learn more.

All employees and their dependents 18+ who want a deeper understanding of their health. Whether your team sits, stands, or is always on the move, they need strong bodies to power performance. Function helps them catch changes early, track progress, and stay in control.

Everything you need to launch a powerful proactive health program for your employees—easy setup, communication support, engagement tools, and reporting. Your team gets access to the most advanced personal health platform out there.

Membership includes 100+ lab tests across every major organ system—selected by the world’s top doctors to monitor for thousands of diseases. And 60+ tests halfway through the year to see what’s changed. Hormones, heart, thyroid, nutrients, metals, metabolism, autoimmunity, liver, and inflammation—what others skip, we don’t. If it impacts your future, we test it.

Advanced Add-Ons like Galleri and MRI and CT scans are available for an additional cost. See the full list of tests.

Most annual screenings cover just 20–30 basics. Function looks at 100+ biomarkers across systems like metabolism, hormones, and heart health to give a deeper view so your employees can track changes and act before symptoms show up.

‍Insurance is not involved—no deductibles, no co-pays, and no surprise bills. We believe in transparent pricing, so your team knows exactly what’s included. Membership may be eligible for FSA/HSA reimbursement.* We’ll send a receipt to support your claim, but eligibility depends on your plan.*Eligibility varies by plan. Check with your plan administrator. Function Health does not guarantee reimbursement.

Every result comes with explanations created by top doctors and built on thousands of hours of research—so your people understand what their numbers mean. If any results fall outside the expected range, the clinician includes notes to help them better understand their results. If any result is critical, a healthcare provider will call them right away.

Function is available in most states through Quest, allowing employees to schedule tests where it’s most convenient.

Yes. We tailor onboarding and support to fit your team with targeted approaches for executives, remote employees, and frontline teams.

Yes. Employers can fully or partially fund Function memberships as an employee wellness benefit.

You’ll get detailed reports* on enrollment, engagement, test completion, biomarker trends, and overall population health, so you can track impact over time. *This data is aggregated and de-identified for privacy.