2026 Employees Retirement System (ERS) - EGWP
Contact Us
Current members and prospective members should call (866) 264-4676 (TTY: 711).
Customer Service Hours:
24 hours a day, seven days a week.
For plan questions you can write to us at:
Express Scripts Medicare P.O. Box 66535 St. Louis, MO 63166-6535
How do I contact Medicare?
For general information about Medicare Part D prescription drug coverage, call (800) MEDICARE or (800) 633-4227. TTY users should call (877) 486-2048, 24 hours a day, seven days a week. You can also visit the official Medicare website at www.medicare.gov. By selecting this link, you will be opening a new browser window to another site. We assume no responsibility for any material or information you may encounter on this or any other non-Express Scripts site.
Have questions about your eligibility or enrollment? Contact ERS or call toll-free (877) 275-4377 (TTY: 711), 8 a.m. – 5 p.m. CT, Monday – Friday.
Evernorth, Express Scripts, and the "E" logo are trademarks of Express Scripts Strategic Development, Inc. The ERS logo is a trademark of Employees Retirement System of Texas. The HealthSelect℠ of Texas logo is a trademark of Employees Retirement System of Texas. All other trademarks are the property of their respective owners.