Functional and root cause medicine

How to find a functional medicine doctor

What the credentials mean, what scope of practice actually allows, what a first visit costs, and how to avoid paying thousands for a supplement catalogue.

What functional medicine is, in practice

The clearest way I can put it: conventional medicine is very good at naming what you have and treating it, and functional medicine is oriented toward asking why it showed up. Those are different questions, and you often want both.

In a room it usually looks like this. The intake is long, an hour or more, and goes back through your history rather than starting at the current complaint. Testing is broader than a standard panel, and reference ranges are read differently: a result inside the lab's normal range but at the far edge of it gets attention rather than a shrug. And the first interventions are usually not drugs, they are food, sleep, movement, stress and targeted supplementation.

What it is not is an alternative to medical care. A good functional practitioner refers out, works with your other doctors, and is direct about where their approach stops. If you have a condition that needs conventional treatment, you need conventional treatment.

This is the lens I work from myself, which is also why I am fussy about who I send people to. The approach is only as good as the person applying it.

The letters after the name decide what they can do

This is the part almost every directory hides, and it changes what a practitioner can actually do for you.

MD or DO is a fully licensed physician. They can diagnose, order any lab, and prescribe. A functional MD gives you the widest scope, and is the right choice if your situation may need prescription management.

ND is a naturopathic doctor, and this one is genuinely complicated because it depends entirely on your state. In a licensed state such as Utah, Oregon or Washington, an ND can order labs and prescribe within a defined formulary. In an unlicensed state the identical person with the identical training has no such authority and is legally closer to a health educator. Same diploma, different powers, decided by geography.

DC is a chiropractor. Many run functional practices with lab testing and nutrition protocols. Scope varies by state and generally does not include prescribing.

NP or PA can usually diagnose and prescribe, sometimes under physician supervision depending on the state.

Nutritionists, health coaches and CFMP holders can be excellent at the food, habit and adherence side, which is where a great deal of the actual result lives. They cannot diagnose or prescribe.

None of these is better than the others in the abstract. What you want is the scope that matches your situation, which is why every card on this site states it plainly.

IFMCP and the certifications that mean something

IFMCP is the Institute for Functional Medicine Certified Practitioner credential, and it is the one I weight most heavily. It requires at least a masters level health degree and an active clinical license, the core course plus six advanced practice modules, a case report and a written exam. It is not a weekend course.

A4M and ABAARM come from the anti aging and regenerative medicine world, with a heavier hormone and metabolic emphasis.

ISEAI matters if your situation involves mould or environmental illness. Shoemaker proficiency is the specific CIRS protocol credential. ILADS is the one for Lyme and tick borne illness.

A caution worth stating: a certification proves training was completed. It does not prove judgment, and it does not prove the person is any good. I have met superb practitioners with no functional certification at all and mediocre ones with a wall of them. Use credentials to build a shortlist, then judge the person on how they handle your first conversation.

What it actually costs

Most functional practices are cash pay, and the reason is structural rather than greedy: insurance reimburses a fifteen minute visit, and this model does not work in fifteen minutes. Something has to give, and what gives is the insurance contract.

Realistic ranges in the US: a first visit runs roughly $200 to $700, sometimes more with a well known physician. Follow ups run $150 to $400. Labs are separate and are frequently the larger number, since a broad functional panel can run several hundred to well over a thousand dollars. Supplements are separate again, commonly $100 to $300 a month early on.

Some practices run on an annual membership or retainer, from around $2,000 to $10,000 a year, which bundles visits and sometimes messaging access. That can be good value for a complex case and poor value for a simple one.

Ask about all four numbers before you book, not just the visit fee. The visit fee is usually the smallest of them, and being surprised by the other three is the most common complaint I hear about this field.

The failure mode to watch for

I want to be straight about the way this goes wrong, because it is common enough to plan around.

The pattern is: an enormous panel is run, a long list of things are flagged as out of optimal range, and you leave with fifteen supplements and a bill. Six months later you are poorer, taking a fistful of capsules, and not obviously better.

What separates a good practitioner here is sequencing and subtraction. A good one runs the tests that will change what they do, not every test available. They start with the two or three things most likely to move the needle rather than everything at once. They take you off things as well as putting you on them. And they tell you what they expect to happen and by when, so there is a way to tell whether it is working.

Ask directly: what would we do differently depending on how this test comes back? If there is no clear answer, the test is decoration and you are paying for it.

Ask as well how they make money on supplements. Dispensary margin is completely normal and not a scandal. A practitioner who is straightforward about it is fine. One who gets defensive at the question is telling you something.

What to ask before you book

Ask these on the phone before you pay for anything. How someone handles being questioned tells you most of what you need to know.

1. 1What is your license, and what does that let you order or prescribe in my state?
2. 2Are you IFM certified, or what is your functional training?
3. 3What does a first visit cost, and what do follow ups cost?
4. 4Roughly what should I budget for labs and for supplements per month?
5. 5Which labs would you likely run for someone in my situation, and what would each one change?
6. 6Do you work with my existing doctors, and will you send them notes?
7. 7How do you decide when to refer out?
8. 8How do you make money on supplements you recommend?

Red flags

• !Tells you to stop a prescribed medication without coordinating with the doctor who prescribed it. This is the one to walk out over.
• !Promises to cure a named disease, or guarantees an outcome.
• !Runs a very large panel before having a real conversation with you about your history.
• !Sends you home with a dozen or more supplements after a single visit.
• !Cannot say what a test result would change, or gets defensive when you ask about supplement margin.

Functional medicine doctors I vouch for

Where else to search

My list is short on purpose and will never cover every state. These are the directories worth searching, and the questions above are what turn a name on a map into a decision.

• Institute for Functional Medicine
• A4M
• ISEAI

Common questions