Health Maintenance Organizations go Results Found: 3 Button group with nested dropdown Stanfield Chiropractic Stanfield Chiropractic 905 Remington Rd. Mattoon IL 61938-4210 (217) 954-0124 Health Alliance Medical Plans, Inc. Health Alliance Medical Plans, Inc. 3310 Fields South Dr. Champaign IL 61822-3742 (800) 851-3379 Happy Healing LLC Happy Healing LLC 1807 S. Neil St. Champaign IL 61820 (707) 382-9791