Is Function Health worth it?

What you get for $365 a year

Every fact on this page about Function Health comes from functionhealth.com, checked on 3 and 4 November 2026. Prices and features change, so check their site before you buy.

Function sells an individual membership at $365 a year, charged annually, which it describes as $1 a day. Its pricing page says the membership is HSA/FSA eligible, and its FAQ tells members to check with their plan and provides an itemised receipt for reimbursement.

Function says the membership includes 160+ lab tests a year: 100+ tests at an annual visit, then 60+ tests 3 to 6 months later to see what has changed. The Mid-Year Test must be used before your annual renewal and does not roll over. You can also buy extra tests on demand.

• Blood draws: at Quest, which Function says has 2,000+ locations across 48 states. Some members need two visits for the Annual Test, including people with an active menstrual cycle and everyone in Arizona.
• Clinician review: Function says clinicians review every result and flag issues. You get action items and a clinician's full summary, and a healthcare provider calls you right away if a result is critical.
• Results: the FAQ says the first results typically start arriving within 48 hours of testing. You can download them as a PDF to share with your own doctor, and upload past results to track them in one place.
• App and AI: web and mobile access, Private AI Chat that answers questions about your results, the option to connect your data to ChatGPT, Claude and Perplexity, wearable connections and written Protocols.

What costs extra

Some services are on offer but sit outside the $365. Budget for them if you expect to use them.

• Add-on tests: Function says you can test any biomarker on demand for an additional member-only cost. Prices are not shown on the public site.
• At-home blood draws: a phlebotomist comes to your home or office in select areas, for an additional fee that varies by location and is paid when you schedule. Function's at-home page says results are ready around 2 weeks after that appointment.
• MRI and CT scans: not included in the membership, but members get member pricing on imaging.
• New York and New Jersey: because of state regulations, people testing there pay certain fees to the lab of up to $248 a year.

What is not listed on their site

Live 1-on-1 sessions with a nutritionist, personal trainer or health coach are not listed on their site. Nutrition, fitness, sleep and stress are covered by Protocols, which Function describes as personalised, evidence-based plans created with the context of your health data and goals.

Member questions go through a member chat. Function's FAQ says it does not offer medical advice there, though it provides explanations for each biomarker and possible reasons for out-of-range results. Booked calls or video visits with a clinician are not listed on their site.

Streaks, leaderboards, challenges and prizes for members are not listed on their site. Nor is a results guarantee.

Function is also clear about its own role. Its site footer says it is a healthcare technology company and not a laboratory or medical provider, that its services are not a substitute for medical care, and that you should discuss questions about results with a primary care physician or other licensed provider.

Cancelling and refunds

Membership renews automatically at Function's then-current price until you cancel, according to its terms of service (last updated 7 October 2026). Cancellation generally takes effect at the end of the billing cycle, and you keep access until then. Function does not allow pauses, but you can cancel and rejoin.

The refund wording differs between pages. The terms give a full refund if you cancel within 48 hours of your first purchase and before any sample is collected, and say renewals are nonrefundable. The FAQ says Function does not offer refunds for prior payments. If a refund matters to you, ask Function which applies before you pay.

Who Function Health suits

Function is a strong fit if you want a broad set of lab results at a low cost per test, are happy to visit a Quest location for a standard blood draw, and like to read your own data and act on written plans and AI explanations. It also suits people who already have a primary care doctor to review out-of-range results, since Function points members to their own provider for questions.

It is a weaker fit if you want ongoing live support from a coach or clinician, or a guarantee tied to results. It is not available to people under 18 or during pregnancy, and testing is not offered in Rhode Island, Hawaii or Puerto Rico.

The trade-off with testing 160+ markers

More tests means more information, and also more results to interpret. MedlinePlus explains that reference ranges are based on results from large groups of healthy people, and that it is common for healthy people to sometimes have results outside the range. Tests can also give false positives, where a result suggests a condition you do not have.

So the more markers you test, the more likely it is that at least one will be flagged. That is not a reason to avoid broad testing, but it is a reason to have a plan for follow-up. MedlinePlus advises talking with your provider about your results, even if they are normal.

What to ask before you buy

• What will I pay at renewal? The site footer calls $365 the first-year membership and says promotions apply to the first year, the terms say renewal is at the then-current price, and a November 2025 article on their site says $365 applies to renewals too.
• Which refund rule applies to me: the 48-hour refund in the terms, or the no-refunds line in the FAQ?
• What do the add-on tests I want cost, and what is the at-home draw fee in my area?
• Do I live in a state with extra lab fees or two-visit testing?
• Who will I talk to about an out-of-range result, and does my own doctor want to see these results?
• Will my HSA or FSA plan accept the itemised receipt?