Affordable Care Act (ACA) Health Insurance Marketplace & Montana Medicaid Expansion (HELP Act) outreach and enrollment assistance. Enrollment assisters from Blackfeet Community Hospital and Southern Piegan Health Center Benefits Coordinator will be on hand to assist with enrollment. Blackfeet Community Hospital and Southern Piegan Health Center Benefits Coordinators will also be available to assist with Medicare questions. Learn about Affordable Care Act Special Protections for American Indians Alaska Natives (AIAN) and Medicaid Expansion (HELP Act) . ACA Health Insurance Marketplace OPEN ENROLLMENT is November 1 – December 15, 2017. Note: Member of Federally Recognized Tribes may enroll in ACA Marketplace Health Insurance anytime during the year (not just during the open enrollment period). Montana Medicaid Expansion: Individuals may apply for assistance any time during the year.