Ambulance Billing Service Golden Heart Services Ambulance Billing Service provides administrative support for ambulance services throughout North Dakota. We are experts at processing claims, dealing with insurance and handling Medicare reimbursements. Under our program, our customers typically experience substantial increases in cash flow and revenue, which they frequently use to update ambulances and equipment. To learn more, please contact Golden Heart Services at (701) 776-5261, ext. 2147 or (888) 495-9034. Or e-mail us at: ghbilling@hamc.com.