The National Association of Accountable Care Organizations is backing provider-led direct contracting entities -- though the group says Medicare Advantage plans shouldn’t be part of fee-for-service -- but physicians that want a single-payer health care system argue the direct contracting demonstration is “threatening the future of Medicare as we know it” by leading to increased privatization. The Trump administration put forward a three-track Direct Contracting model, but Biden’s CMS put the Geographic Direct Contracting model on hold last March after...