At first it looked like CMS was planning on allowing doctors to "balance bill" Medicare patients. Balance billing is already a controversial issue with private insurance; it's the practice of a doctor/hospital charging the patient directly for the difference between what the doctor wants to be paid and what the insurance company agrees to pay them.
I've noted before that now that the Republicans in Congress have repealed the ACA's much-hated (but vitally necessary) individual mandate penalty (effective 2019), the odds of it being reinstated at the federal level are virtually zilch. Even if there's a massive blue wave in November and the Democrats are able to retake both the House and Senate, they're extremely unlikely to be willing to face the same type of firestorm/backlash that they did back in 2009-2010 over it.