Preferred Health of Marshall P.A. Health Care and Personal ServicesChiropractor & Massage Nutrition Programs Preferred Health of Marshall P.A. Visit Website 303 O'Connell Street Marshall, MN 56258 (507) 532-7458 (866) 532-7458 (507) 532-5612 (fax) Facebook About About Open 6 days a week; including days, evenings and Saturdays. Specializing in chiropractic, nutritional counseling and rehabilitation. New patients always welcome and seen the same day!