Under ObamaCare, most health insurance plans must cover a set of preventive services without any cost to patients. Patients are soon discovering, however, that anything else discussed during a visit with their health care providers could cost them. “There are times when a person might be charged cost-sharing for a service that is unrelated to the screening or preventive service, while they are not charged cost-sharing for the screening or preventive service itself,” says Jesse Bushman, director of advocacy and government affairs at the American College of Nurse-Midwives. But doctors don’t always tell patients about the possibility of fees up front.