These types of plans must meet all basic medical requirements under ACA and are the most comprehensive plans on the market. This means that by purchasing one of those plans you’ll get a minimum of the essential care benefits like emergency services, hospitalization, out-of-patient services, maternity leave, prescription drugs, substance use for disorder services (like mental health and behavioral problems), pediatric services (including oral vision and care), preventive services for chronic illnesses and rehabilitative services. Also, you can’t be rejected by your insurer for some pre-existing conditions you might have. Altough, you’ll need to purchase this plan during the ACA Open Enrollment Period. Four types of ACA Plans are HMO, PPO, POS, and EPO. There are also Catastrophic plans for people under 30.