Some services and benefits require a health care provider to complete a form or make a phone call that gives permission to get extra services and supplies if you have a special health care need. Your insurance carrier will have their own list of services and benefits that require a prior authorization. If you have questions about what requires a prior authorization, contact your insurance carrier. If you have Health First Colorado (Colorado’s Medicaid Program) or Child Health Plan Plus (CHP+), you can find out what benefits and services are covered here. You can also contact your health care provider or the Health First Colorado Member Contact Center at 1-800-221-3943 / State Relay: 711. Hours: Monday-Friday, 7:30 a.m. to 5:15 p.m. (closed state holidays).