A new Kaiser Family Foundation analysis of medical bills from large employer plans finds that a significant share of inpatient hospital admissions includes bills from providers not in the health plan’s networks, generally leaving patients subject to higher cost-sharing and potential additional bills from providers. Almost 18 percent of inpatient admissions result in non-network claims for patients with large employer coverage. Even when enrollees choose in-network facilities, 15 percent of admissions include a bill from…