The Centers for Medicare & Medicaid Services has proposed mandating minimum network standards for health plans sold on the federal marketplace in 2017 as part of an effort to handle the broad shift toward narrow provider networks. The Affordable Care Act requires that all medical policies on the exchanges have enough in-network hospitals and doctors for members so that “all services will be accessible without unreasonable delay.” However, the 381-page proposed rule (PDF) released Friday goes a step further, asking states to establish a quantitative measure to ensure ACA policyholders have sufficient access to healthcare providers.