Function gives you access to 160+ yearly lab tests—5x more than a typical annual physical—covering everything from heart, hormones, thyroid, liver, kidneys, heavy metals, nutrients, inflammation, and more, plus actionable insights from top doctors. All results are stored in one place, making it easy to spot trends, track progress, and take action.
Function Health (functionhealth.com) has 3,039 customer reviews on Five Star Index, with an average rating of 4.4 out of 5.
Also known as
functionhealth.com
Website
functionhealth.com
Category
Hospital & Emergency
Listed on Five Star Index
2026
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The company replied to 90% of reviews.
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Most recent review: October 2026.
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Their customer service is pretty awful. There’s nobody available after 8 o’clock Eastern. They could literally hire customer service in the Philippines for three dollars an hour, but nope.
It took 4 days to book bloodwork because their website literally does not work. They also booked me for bloodwork on a random day without any consultation. Just weird and time wasting and frustrating.
MF
M. F.
More expensive than advertised
Function advertises $499 for 100+ tests. In reality, $499 is the entry price and there is a very long list of add-on tests that quickly drive the cost over $1k. Many of these tests can be ordered by a physician, and covered by insurance. Or they are entirely unnecessary in the first place. Almost anyone who can afford to drop $500-$1k or more on lab tests probably has insurance. It seems like the thing that's actually happening here is that Function wants you to pay to become a patient in their network. That's it. Feels bait-and-switch-y.
KC
Kimberly C.
Waste of money.
Incredibly expensive blood tests. 0 clinical summary or workable results within the timeframe. Not helpful service at all. Waste of money. Look for a local functional doctor vs using this service.
JC
J C.
I wanted to like this
I wanted to like this, but it was kind of a disaster. Firstly, as a female, they make you time the blood draw in a specific window according to your cycle, which makes it very difficult. Cycles are not always exact or predictable, so this was frustrating.
Secondly, I was not informed by anything on the site before paying that I would need TWO blood draws, no more than 10 days apart, because they test so many things that they simply can't do it all in one draw. So, after waiting almost a month for my results, I found this out only after connecting with support.
The problem is, I live in an area where I have to drive an hour, one way, to get to the lab they partner with. So all of this was a huge hassle.
In the end, I asked for a refund, but they didn't even refund me 1/3 of the rate.
Finally, the 'doctor's notes' that you receive are clearly AI-generated and don't give you any sort of actual guidance. So, in terms of interpreting and applying the results I did get, it was pretty worthless.
I love this concept and was looking for a way to get more in-depth info on my cardiovascluar health, without having to go through primary care, referral to specialist, lab visit etc. My primary driver was convenience and this was the opposite of that.
TY
Tracy Y.
Idiotic customer service
The platform is great and the idea behind the business is great. But customer service is almost unbearable! I need to repeat 4 times my simple request of getting a copy of Anytime Tests which I ordered to retest the out-of-range markers from my annual test! So far I have not got a copy of the Anytime Tests after numerous tries. The customer service team do not read well and do not think at all! It is an absolute shame that such low quality service is being rendered for a high-tech leader in the healthcare industry! There should be a phone number for us to call and a way for us to escalate our complaints instead of dealing with idiotic reps via texting for weeks! Will not recommend the service if the customer service does not employ people who can read and think!
RJ
Rob J.
Absolutely terrible scheduling…
Absolutely terrible scheduling platform. Ridiculous. Non existent customer service. Very limited testing site availability.
JS
Jesse S.
Comprehensive labs without an insurance nightmare
I've been a Function Health customer since 2023 and I can't overstate the value of having baseline levels for important biomarkers with graphs to determine if something is trending up or down.
Many of the blood tests that are run every year would never be permitted by insurance and if you paid out of pocket individually for these tests I imagine the cost would be much much higher than the $500 yearly price Function charges.
I love having access to information about all the various organs in my body as well as nutrient/vitamin and hormone levels.
DS
David S.
Good Information | Inconsistent Customer Service
Function Health is heavily advertised on social media. I've seen many ads on Facebook. Their basic service is $500 for a comprehensive set of tests which measure a variety of different "biomarkers." This is how they describe it: "100+ lab tests and insights from top doctors."
I'll start with the positive first. The results are posted online for you in an easy to read format that includes a comprehensive report about the state of your health. They even provide you with suggestions for next steps to take to improve your health. I'm not sure where those "insights from top doctors" come in! Perhaps they're incorporated into the report. I'm quite sure that there are no doctors personally looking at your results!
And now the reason why I gave Function Health just 3 stars. Their customer service is somewhere between mediocre and abysmal. First of all, they don't offer any phone support. $500 is a lot of money to spend not to be able to speak to anyone on the phone! They have text support (through a web form) but, in my experience, the quality of that support varies greatly!
I've spent the last few days chatting with several people--but not in real time--about what I thought were some pretty basic questions. When they're not flat out ignoring my questions, they
often can't seem to grok what I'm asking. The questions I've posed are very basic! Out of frustration I turned to ChatGPT and got a perfectly lucid, easy-to-follow answer to my query. When I posted the results, in a follow-up question, to confirm that they were accurate, they completely ignored the question!
When I say the chats are not in real time, I mean that I may have to wait 12 hours or more for a reply. And, as I pointed out, that reply, especially as of late, often doesn't even address my questions! I've asked repeatedly if I could please talk to someone; but they just keep reiterating that they only do support through chat and text.
As for the actual testing, it mostly happens through Quest Diagnostics. Apparently there are many locations around the country but, as the popularity of Function Health surges, they are often staffed by over burdened phlebotomists. In other words, it's like a blood drawing assembly line. That being said, my experience was okay since I was aware of this going into it and tried to bring some lightness to the interaction (which helped).
So, in summary, I'd give Function Health an A for the end result (the comprehensive report), a C+ for the actual testing (mostly blood drawing), and a D for customer service.
UPDATE: After repeated attempts to get my questions answered, Ashlyn reached out to me. She was very helpful and apologetic. She provided me a number where I could text the company with future queries and also mentioned that she'd passed on my feedback about the poor customer service I experienced. Hopefully, this will help them to improve their communication and provide a more timely method of getting help!
LINK: my-dot-functionhealthmy-dot-com/signup?code=DSIMONI10&_saasquatch=DSIMONI10
If you use this referral code, just substitute a dot for:
-dot- and add https:// to the beginning of the link.
Full Disclosure (about the link above): I get a kickback if you decide to sign up for it. Obviously, an honest review is more important to me than hyping the company for a fast buck! But, as you can tell from reading my review, I do value the end result, even if their customer service could be improved. There are alternatives to Function Health with better customer service but the ones that I found were over $1000 dollars, some of them into the thousands of dollars.