The Staff of Health Services Associates, Inc. Ron L. Nelson, PA, President   President Ron L. Nelson, PA President 2 East Main Street Fremont, Michigan 49412 United States Phone Number: (231) 924-0244 Fax Number: (231) 924-4882 nelson@hsagroup.net Send Email   Vice-President Chris A. Christoffersen Vice-President Administration and Cost Reporting 2 East Main Street Fremont, Michigan 49412 United States Phone Number: (231) 924-0244 Fax Number: (231) 924-4882 christoffersen@hsagroup.net Send Email Chris A. Christoffersen, Vice-President Administration & Cost Reporting Nancy B. Pratt, Administrative Services   Administrative Services Nancy B. Pratt Administrative Services 2 East Main Street Fremont, Michigan 49412 United States Phone Number: (231) 924-0244 Fax Number: (231) 924-4882 npratt@hsagroup.net Send Email Director of Billing Services Julie A. Wiegand Director of Billing Services 2 East Main Street Fremont, Michigan 49412 United States Phone Number: (231) 924-0244 Cell Phone: (231) 250-7411 Fax Number: (775) 637-8940 Fax Number : (231) 924-4882 wiegand@hsagroup.net Send Email Julie A. Wiegand, Director of Billing Services Robin VeltKamp, Billing and Enrollment Specialist Billing and Enrollment Specialist Robin M. VeltKamp Billing and Enrollment Specialist 2 East Main Street Fremont, MI 49412 United States Phone Number:  (231) 924-0244 Fax Number:  (231) 924-4882 rveltkamp@hsagroup.net Send Email