Contact Us

Customer Service:
Toll Free: 1-866-597-9560 (TTY: 711)*
Fax: 1-888-480-2577

Toll Free: 1-866-536-1041 (TTY: 711)*

Springfield Office
CoxHealth MedicarePlus
3330 S. National Avenue, Suite 100
Springfield, MO 65807

Company Headquarters
Essence Healthcare
13900 Riverport Drive
Maryland Heights, MO 63043

Telephone lines are open 8 a.m. to 8 p.m., seven days a week. You may reach a messaging service on weekends from April 1 to September 30 and holidays. Please leave a message, and your call will be returned the next business day.

Mailing address and fax number for written customer service, appeals and grievance requests:

CoxHealth MedicarePlus
PO Box 5907
Troy, MI 48007

Fax: 1-888-480-2577 (customer service and claims)
Fax: 1-314-770-6024 (appeals)

*Please note that our main customer service number (above) is the designated number for submitting oral requests.