An eligible individual who is enrolled in MCHP Premium shall be covered through a Maryland Medicaid Managed Care MCO. Timely Enrollment. The representative shall: Send to the Department or its designee the first month's family contribution within 30 days of receiving notice of eligibility for MCHP Premium, before enrollment can be completed; and Complete and submit to the Department's enrollment broker a MCO selection and enrollment form within 28 days of receiving notice of eligibility for each eligible child.