Health Choice recipients can contact their MCO member services phone number on the back of their member ID card. MCOs maintain a listing of physicians in the area. If an individual does not have an MCO, but is seeking a physician, contact the HealthChoice Help Line: 1.800.284.4510. Member services (including customer service and physician listings): Wellpoint Maryland (formerly Amerigroup): 833-707-0867; Aetna Better Health: 866-827-2710; Care First: 800-730-8530 or 410-779-9369; Jai Medical Systems: 888-524-1999; Kaiser: 855-249-5019; Maryland Physicians Care: 800-953-8854; Medstar: 888-404-3549 or 410-581-0708; Priority Partners: 800-654-9728; United Health Care: 800-318-8821. For additional service or the above numbers are not sufficient, contact the local ombudsman at: 240-777-1635.