And a few answers. not feeling attacked, the system is just bullshit. Never charge elastic prices for an inelastic good, never divorce the negotiators from the purchasers, etc.
1) Because the contracts are between the providers and the insurance companies, not the providers and the manufacturers. A contract between the provider and the manufacturer would be considered vertical integration and is a violation of the Sherman Antitrust act. FUN FACT: any collective action by individual businesses towards price discovery of insurance contract is also a violation of the Sherman Antitrust act and considered insurance fraud. In other words: we are legally banned, in very strong language, from asking a competitor "is Primera ripping you off on Rhogam, too?" Not that we don't? Just that we're committing a felony when we do. Because it's worth it. Saying things like "a little birdie told me you should check page 78 through 87 of the Aetna contract they're sending around because they substituted pages and cut your rates by 90% without disclosing any changes. It was a very talkative bird."
2) medicare advantage and medicaid are both run by private insurance companies. We rarely work with medicare because it isn't our focus. Medicaid, in Washington State at least, is administrated by about 11 different insurance companies. In our county there are seven choices. The prices are the same, the reimbursement is the same, but the schedule is published. I'm aware of the article's framing, that's because they're lazy. With medicare/medicaid the prices are set - you make your money by administrating the plan. So when the patient scheduled a vaccine visit and you let her ask questions without an acute appointment? BILLING FRAUD. It's this bad: two or three of the medicaid providers will call you up and say "hey I need to see a doctor in the next two weeks" and when we say "we're booked out" they send a nasty letter letting us know they're canceling our contract because we're not seeing their patients. Then they tell the state "yeah, we're not able to make money at these rates because there just aren't enough quality providers, looks like we're going force majeure on the contracts."
3) M4A is far and away the best option for a national healthcare system. If your state feels that medicaid should be a punishment for doctor and patient, having it be a low-price option available to anyone will illustrate that it's the same punishment at a third the price and it gives you something to vote for. Vote Jerry for governor he's dropping copays to $15. Vote Rebecca she's decreasing out-of-pocket on birth control. My basic argument is that if your governor is Ron DeSantis you're pretty much fucked anyway and if "Floridians are fucked therefore nobody else gets M4A" then fuck Florida.