Internal Medicine Providers

 

Bruce Stowell, MD

Bruce Stowell, MD

Dr. Stowell joined the Grants Pass Clinic in September, 1983 and is certified by the American Board of Internal Medicine. Dr. Stowell is a graduate of the St. Louis University School of Medicine. He completed his internship and residency at the University of Minnesota.
Ronald S. Sinclair, MD

Ronald S. Sinclair, MD

Dr. Sinclair joined the Grants Pass Clinic in July, 1987 and is certified by the American Board of Internal Medicine. A graduate of the University of Missouri Medical School in Columbia, Missouri, Dr. Sinclair served his internship and residency in Internal Medicine at the University of Iowa.

Jeremy J. Hitchcock, MD

J. Spencer Countiss, MD

Dr. Countiss joined the Grants Pass Clinic in July, 1993 and is certified by the American Board of Internal Medicine. Dr. Countiss received his M.D. degree from Washington University School of Medicine in St. Louis, Missouri. He completed an internship and residency at Barnes Hospital in St. Louis.

Haitham B. Haddad, MD

Haitham B. Haddad, MD

Dr. Haddad joined the Grants Pass Clinic in May, 1997 and is certified by the American Board of Internal Medicine. Dr Haddad is a graduate of Loma Linda University School of Medicine, Loma Linda, California. He served his internship and residency at Oregon Health Sciences University in the Categorical Internal Medicine program.

Markus H. A. Opel, MD

Markus H. A. Opel, MD

Dr. Opel joined the Grants Pass Clinic in January, 1998 and is certified by the American and German Boards of Internal Medicine. Dr. Opel received his M.D. degree from Christian-Albrecht-Universitat, Kiel, Germany. He completed three Internal Medicine residencies: County Hospital of Itzehoe Germany, Emanuel/Good Samaritan Hospitals in Portland, Oregon and Central Hospital Reinkenheide, Bremerhaven, Germany.

Edward G. Groenhout, MD

Edward G. Groenhout, MD

Dr. Groenhout joined the Grants Pass Clinic in June, 2003 and is certified by the American Board of Internal Medicine. Dr. Groenhout is a graduate of the University of New Mexico School of Medicine in Albuquerque. He served both his internship and residency at the University of Michigan Medical Center, Department of Internal Medicine, in Ann Arbor.

Andrew S. Pitzak, DO

Andrew S. Pitzak, DO

Dr. Andrew Pitzak joined Grants Pass Clinic on June 1, 2006 and is certified by the American Osteopathic Board of Internal Medicine. He received his undergraduate degree from Brigham Young University and his medical degree from the University of Osteopathic Medicine & Health Sciences in Des Moines, Iowa. Dr. Pitzak completed his internship and residency at Grandview Hospital & Medical Center in Dayton, Ohio.

Marcel Wiggers, MD

Marcel Wiggers, MD

Dr. Wiggers joined Grants Pass Clinic on October 1, 2006. He is board certified by the American Board of Internal Medicine. Dr. Wiggers received his medical degree from Loma Linda University School of Medicine and completed his internship and residency at Loma Linda University Medical Center.

Eric M. Perry, MD

Eric M. Perry, MD

Dr. Perry rejoined Grants Pass Clinic on November 1, 2006 and is Board Certified with the American Board of Internal Medicine. He is a graduate of Creighton University School of Medicine in Omaha, Nebraska, and served his internship at the Naval Medical Center in Oakland, CA. Dr. Perry was a Flight Surgeon at the Naval Aerospace and Operational Medicine Institute in Pensacola, Florida and completed his residency at Providence Portland Medical Center in Portland, Oregon.

 Ben Moss, PA-C

Ben Moss, PA-C

Physician Assistant

Accepting New Patients

Mr. Moss received his Masters of Science degree from Western University of Health Sciences in Pomona, CA. He is board certified by the National Commission on Certification of Physician Assistants. He comes to Grants Pass Clinic with 11 years’ experience and started his practice on January 12, 2016.