New Search 11782 Practice accepting new patients. Mark R. Northfield, MD (707) 778-1131 Primary Specialties Orthopedic Surgery Sports Medicine Hips, shoulders, knees Minimally invasive surgery Primary Office Address: 1496 Professional Dr. Suite 601 Petaluma, CA 94954 Phone: (707) 778-1131 Fax: (707) 778-3818 Web Page: www.stjosephhealth.org Recommend this Physician Request an Update for this Physician View this Physician's Location Physician Bio Dr. Mark Northfield is an orthopedic surgeon in Petaluma, California and is affiliated with Petaluma Valley Hospital. He received his medical degree from Warren Alpert Medical School of Brown University and has been in practice for more than 20 years. Publications & Presentations Northfield, M., Patel, R. K., Richardson, A., Taylor, M. D., Richardson, P. D. "Lifestyle changes in mild asthma during intermittent symptom-related use of terbutaline inhaled via ''Turbohaler''.." Curr Med Res Opin Nankani, J. N., Northfield, M., Beran, Y. M., Richardson, P. D. "Changes in asthmatic patients'' symptoms and lifestyles on institution of inhaled budesonide therapy.." Curr Med Res Opin Education Medical School: Harbor- UCLA Medical Center Medical School: University of California- Los Angeles School of Medicine Medical School: Brown University Program in Medicine Internship: University of California- Los Angeles School of Medicine Internship: Harbor- UCLA Medical Center Internship: Brown University Program in Medicine Residency: Brown University Program in Medicine Residency: University of California- Los Angeles School of Medicine Residency: Harbor- UCLA Medical Center Areas of Interest Orthopedic Surgery