Matthew J. Riffle, MD Specialties: Internal Medicine, Family Medicine, Primary Care Saint Francis Clinic Poplar Bluff225 Physicians Park DrivePoplar Bluff, MO 63901 [map]573-727-5500 Board Certification American Board of Internal Medicine Medical Education 1978 - St. Louis University School of Medicine, St. Louis, MO Residency 1985 - Wilford Hall Medical Center, Lackland AFB, TX