I admit to not knowing a whole lot about how Maryland's "All-Payer" system works aside from every payer (Medicare, Medicaid, private insurance) having to pay the same amount for the same services at a given hospital. Here's a general summary from Wikipedia:
All-payer rate setting is a price setting mechanism in which all third parties pay the same price for services at a given hospital. The system does not imply that charges are the same for every hospital. It can be used to increase the market power of payers (such as private and/or public insurance companies) to mitigate inflation in health care costs. All-payer characteristics are found in the health systems of France, Germany, Japan, and the Netherlands. Maryland also uses such a model.
California is exploring a bold and controversial new plan to rein in health care spending by letting the state government set medical prices.
...Still, California’s new proposal is worth examining as one that steps closer to single-payer — but doesn’t go quite all the way. It’s one plausible step a state could take without any assistance from the Trump administration, as we see more blue states looking for ways to shape the future of their own health care systems.
”I think we have appreciated how much we’ve been able to do with transparency and data, and how much we’ve been able to collect, but we reached the point where we felt like we had to tackle the issue of prices head on,” says Sara Flocks, policy coordinator for the California Labor Federation, which is backing the proposal.
