Function Health Discount Codes: What Function's Own Pages Show

We did not try a code at checkout, because that would mean starting a real order. So nothing on this page says a code works. Every plan is scored on the best blood tests page, and Function's fees are in the Function Health cost guide.

What Function's own pages show

The footer shows that promotions do exist from time to time, and that they apply to the first year unless Function says otherwise. It does not name a current one.

Ways to pay less that Function describes itself

Function pays referral credit to the person who refers you, and that person may have a reason to share a link. That is how the program works. If you know a member, ask them directly.

Function's FAQ does not say how a referred person's credit is applied at checkout. We could not confirm that from public pages, so read the terms shown when you sign up.

Codes we saw elsewhere, none verified

Each row is a claim read on a third-party page on November 7, 2026. We have not tested these codes and we cannot say that any of them works. A code may be expired, limited to one person, or never have worked. We leave out the sites' names because their claims are the point here, and we are not recommending any source.

We keep this log so that you can see what is being claimed and when. A code on this list is not a recommendation.

How to check a code yourself

1. Open Function's pricing page directly, not through a coupon link.
2. Start signup and look for a place to enter a code. Stop before you pay if the total does not change.
3. Compare the total with the yearly price on the pricing page. Only that number is a saving.
4. Read the renewal price too. Function's footer says promotions apply to the first year unless it says otherwise.

Watch for coupon pages that send you through a tracking link. That link may change which offer you see. It is also how those sites get paid, which does not make a code false, but it is worth knowing.

Is a discount worth chasing?

Even at the full price, the choice comes down to the plan, not the code. Function's price works out to about $3.69 per measured marker, against $1.50 at Vitals Vault's Essential panel and $3.69 at Superpower. Those lists differ, so compare them in our cost per biomarker guide. A small code matters less than whether the plan fits. Our is Function Health worth it page has the record and terms, and all yearly prices are on our price page.

Function's price can differ in New York and New Jersey, per its FAQ, and the New York cost guide covers that. Paying from an HSA or FSA depends on your plan, and the IRS lists eligible medical expenses in Publication 502. The CMS QCOR lookup is a free way to check any lab a seller names, whatever you pay.