About
Mark D. Erhardt, DO brings a career shaped by military medicine, surgical training, and community family practice to his MDVIP-affiliated office in Bartlesville, Oklahoma. He earned a Bachelor of Arts in Psychology from the University of Michigan in 1989, then a Master of Science in Biology from Edinboro University of Pennsylvania in 1993. He completed his Doctorate of Osteopathic Medicine at Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania in 1997.
After medical school, Dr. Erhardt completed a General Surgical Internship at the Naval Medical Center in Portsmouth, Virginia. He served with Naval Special Warfare Group TWO from 1998 to 2003, working first as an Undersea and Diving Medical Officer and then as Senior Medical Officer. His military certifications include the Naval Undersea Medical Institute Undersea Medical Officer Program, Mixed Gas Diving, Cold Weather Medicine, Combat Casualty Care, and the Medical Management of Chemical and Biological Casualties Course. The Navy recognized his service with three Navy and Marine Corps Achievement Medals and a National Defense Medal. He completed a second internship and then a Family Medicine residency at Ghent Family Practice, Eastern Virginia Medical School in Norfolk, Virginia, finishing in 2006. Dr. Erhardt holds licensure in Oklahoma and belongs to the American Osteopathic Association. He has co-authored research on arthroscopic versus open distal clavicle excision in elite special warfare personnel and on occult barotrauma during dry deck shelter operations. His clinical philosophy centers on treating every patient the way he would want a physician to treat his own family.
Education & Training
Undergraduate
University of Michigan, Ann Arbor, MI — Bachelor of Arts, Psychology, 1989
Medical School
Lake Erie College of Osteopathic Medicine, Erie, PA — Doctorate of Osteopathic Medicine, 1997
Residency
Family Medicine, Ghent Family Practice - Eastern Virginia Medical School, Norfolk, VA, 2004-2006
Additional Training
Edinboro University of Pennsylvania — Masters of Science, Biology, 1993; Naval Medical Center - General Surgical Internship, Portsmouth, VA, 1997-1998; Naval Undersea Medical Institute/Undersea Medical Officer Program
Certifications
Who is Dr. Erhardt right for?
Dr. Erhardt works well for adults seeking a primary care physician who takes a thorough, hands-on approach. Patients managing chronic conditions such as hypertension, high cholesterol, or type 2 diabetes benefit from his preventive focus and custom wellness planning. His military medical background makes him a strong fit for patients who value clinical depth and direct communication. Anyone wanting consistent, personal access to their own physician, including after-hours phone availability, will find his practice a natural match.
Similar Doctors Nearby
Dr. Elizabeth SherrockMD
Family Medicinechronic disease, hypertension, diabetes +1 more
Dr. M. Ryan VaclawMD
Family MedicineDr. William DavitoDO
Family MedicineFrequently Asked Questions
Dr. Erhardt practices comprehensive family medicine and treats a broad range of acute and chronic conditions. His clinical focus includes preventive care, chronic disease management such as hypertension, high cholesterol, and type 2 diabetes, and routine primary care. He also coordinates care for patients who need hospital-level or specialist attention.
Dr. Erhardt holds a Doctorate of Osteopathic Medicine from Lake Erie College of Osteopathic Medicine and maintains membership in the American Osteopathic Association. He also holds multiple military and specialized medical certifications, including the Naval Undersea Medical Institute Undersea Medical Officer Program and the Medical Management of Chemical and Biological Casualties Course.
Dr. Erhardt earned his DO from Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. He completed a General Surgical Internship at the Naval Medical Center in Portsmouth, Virginia, and finished his Family Medicine residency at Ghent Family Practice, Eastern Virginia Medical School in Norfolk, Virginia in 2006.
Dr. Erhardt does not bring a computer into the exam room. He believes the most valuable information comes from examining and speaking directly with the patient. This approach allows him to focus entirely on the person in front of him during each appointment.
Yes, Dr. Erhardt served with Naval Special Warfare Group TWO from 1998 to 2003. He worked as an Undersea and Diving Medical Officer from 1998 to 2001 and then as Senior Medical Officer from 2001 to 2003. The Navy awarded him three Navy and Marine Corps Achievement Medals and a National Defense Medal.
Dr. Erhardt co-authored two research publications. The first examined arthroscopic versus open distal clavicle excision in elite special warfare personnel. The second investigated occult barotrauma during dry deck shelter operations, submitted to Undersea and Hyperbaric Medicine.
Yes, Dr. Erhardt places real importance on being present when patients need hospital care. He personally advocates for hospitalized patients and aims to be there when it matters most. This level of involvement sets his practice apart from many primary care settings.
Yes, Dr. Erhardt makes himself available by phone after hours and on weekends for urgent matters. Members can reach him directly rather than navigating an answering service or urgent care system.
Doctor profile last updated June 6, 2026