The state of medical care in the US is such that the regulators have to be very conservative. This isn’t a sophisticated place with good access or integrated records for care in most cases.
If you’re a high risk patient like an addict, when you end up in the ER for whatever, they’re just going to cut off whatever medication you’re on, keep you from dying, and kick you out as soon as they aren’t liable.
If you’re a high risk patient like an addict, when you end up in the ER for whatever, they’re just going to cut off whatever medication you’re on, keep you from dying, and kick you out as soon as they aren’t liable.