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Customer Service

Contact us online or reach us by phone, mail, or in person at one of our roaming customer service locations.



Call the number on the back of your ID card if you have a question about benefits or claims. For technical questions about the website, call 1-877-298-3918 between 8am - 6pm EST.



For Hearing Impaired Members


AT&T’s National Relay Service can handle communications for our hearing impaired members.


Call 800-232-5460 in Delaware to access the relay service using a home or business TDD.


If you are outside of Delaware, call 711.


There is no charge for the relay service. Normal toll rates apply for all long distance calls.


Online Form



Use our online form or send us a message by selecting the customer service link when you log in.



Customer Service Phone Number


To reach Highmark Blue Cross Blue Shield Delaware Customer Service by telephone, call 1-800-633-2563. Hours of operation are 8:00 a.m. to 7:00 p.m., Monday through Friday, EST except for those listed below. Please have your ID card ready when you call or a copy of your bill if you're calling about your premium.



Customer Service Phone Numbers & Hours by Plan

Plan Phone Number Days Time(EST)

 DuPont

888-431-4650


Monday-Friday


8am-8pm


 Axalta


888-745-3216


Monday-Friday


8am-8pm


 Chemours


866-730-8592


Monday-Friday


8am-8pm


 Member Service


800-633-2563


Monday-Friday


8am-7pm


 Individual Health Plans under 65 (Direct Pay)


888-200-9261


Monday-Friday


8am-6pm



Looking to Buy Highmark Coverage for Individuals and Families? Need Help with Enrolling?

Request a Call to talk to a Highmark licensed representative about our non-Medicare plans or to enroll.



Mailing Address



Highmark Blue Cross Blue Shield Delaware
P.O. Box 1991
Wilmington, DE 19899-1991

Please include your group and ID number when you write.



Roaming Customer Service Schedule



Stop in at one of our roaming customer service centers to speak with a customer service representative.



New Castle County

Newark Senior Center
200 White Chapel Drive
Newark, DE

302.737.2336
Claymore Senior Center
504 S. Clayton St.
Wilmington, DE

302.428.3170

Kent County

Mamie Warren Senior Center
1775 Wheatley's Pond Road
Smyrna, DE

302.653.4078
Modern Maturity Center
1121 Forest Avenue, Route 8
Dover, DE

302.734.1200
Harrington Senior Center
102 Fleming Street
Harrington, DE

302.398.4224

Sussex County

Milford Senior Center
111 Park Ave.
Milford, DE

302.422.3385
Lewes Senior Center
310A Nassau Park Road
Lewes, DE

302.645.9293
Seaford/Nanticoke Senior Center
1001 West Locust Street
Seaford, DE

302.629.4939


Use MapQuest.



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