When should I call Merck-Medco customer service versus Medical Mutual of Ohio customer service?
Merck-Medco customer service should be contacted for mail order inquiries, automated pharmacy locator information, and claim forms for prescription programs that offer a copay option at the time of purchase. Medical Mutual of Ohio customer service should be contacted for any claim status, pharmacy problems, general benefit inquiries, and major medical claim forms for non-participating pharmacies.
