The growth of multipayer patient centered medical home (PCMH) reform across the country, accelerated by the Affordable Care Act, offers the opportunity to widely transform the primary care delivery system. Recent Health Affairs research [1] noted 17 multipayer PCMH initiatives had been launched since 2008; and with State Innovation Model (SIM) [2] grants awarded to 39 states and territories, these numbers will grow — multipayer payment reform is a core req