How do i contact oneworld? Billing (402) 502-8876. Marketing and media requests (402) 502-8871. Human Resources & Recruitment (402) 502-8897. Enrollment. Medicaid and Marketplace Outreach and Enrollment (402) 502-8888. Patient Feedback. OneWorld values the opinion of our patients, and we are continually seeking ways to improve our care and service.How do i contact bank of the west premier customer service? You can contact Bank of the West Premier Customer Service at 1-844-3GO-West (346-9378), Monday through Friday, 6 a.m to midnight Central Time and 7 a.m. to midnight Central Time, weekends and most holidays.How do i contact bank of the west credit card company? For any questions about your existing MasterCard® credit card, call 1-800-996-2638 / TTY 1-800-659-5495. Learn more about Bank of the West credit cards.How do i request an appointment with a oneworld doctor? To request an appointment, please call our clinical contacts listed below. To reach OneWorld clinicians after clinic hours, please call (402) 734-4110. OneWorld values the opinion of our patients, and we are continually seeking ways to improve our care and service.