I think my initial intake was $200-300 to get the full blood panel and have a follow-up with a patient care coordinator as well as an appointment with the doctor (who is incredible). At the time I ordered the blood panel, I wasn't even planning on having a long-term relationship with them, but after seeing some stuff on my blood panel that I wanted to work on and having them come up with a plan, speaking to the docs regularly, I've just gotten so much value out of it. The whole thing made me feel like "wow, this is what healthcare should feel like."
Sadly, it's all out of pocket, but it's the last thing on the list of things I would complain about having to spend money on.
For some people, full bloods every 6 months might be overkill, I guess it just depends on what you have going on (not that I had major issues, but definitely things to address and others to optimize). But without a full panel, you're just flying blind. Sometimes, I get the panel and nothing has moved at all and there's nothing to do. Other times there are things I can easily address and the more panels I have, the more of a personal health profile I have to work with.
What argument would a doctor have against order a wider range of tests? The blood is outside of your body, and the physician is not in the lab running the centrifuge or mixing chemical agents to react.
And nowadays, to make matters worse, I have to book an appointment for this delightful experience 2 months in advance for my existing doctor, and five months in advance for a "new patient visit" at a new doctor. Everything around Family Doctors says "go away".
Note that 'the DMV' is itself a bizarre American experience that a lot of the world doesn't put up with/find a need for.
It took quite a lot of references like this going straight over my head to look into this thing 'everyone [in the USA]' has to do and is familiar with and understand. (If I need a replacement driving licence or to change my address or whatever, I spend two minutes on a web form and it comes in the post. There just isn't 'a DMV' or equivalent office for me to (have to) go to.)
its more common than you think; and many professionals resent the idea that its anything resembling a 'free market' where a 'consumer' (patient) can 'order services' without their provider's approval.
as you might imagine there are reasonable-sounding prima facie arguments for both sides of this discussion.