About
Allen Hamaker, MD is a board-certified internist with more than 25 years of clinical experience in Oklahoma City. He earned his Bachelor of Science in Medical Technology from Michigan State University in 1986, then went on to complete his Doctorate of Medicine at Wayne State University School of Medicine in Detroit in 1990. He completed both his internship and his Internal Medicine residency at Blodgett Memorial Medical Center, Saint Mary's Health Service Program in Grand Rapids, Michigan, finishing in 1993.
Dr. Hamaker holds certification from the American Board of Internal Medicine and maintains active membership in the Oklahoma State Medical Society and the Oklahoma County Medical Society. He practices with hospital affiliations at Deaconess Hospital and Integris Baptist Hospital. His clinical focus spans type 2 diabetes, hypertension, high cholesterol, atrial fibrillation, thyroid disorders, and co-management of multiple sclerosis. He is passionate about catching problems before they become serious. He works to explain complex medical issues in plain language and builds personalized wellness plans for each patient. His guiding belief: an ounce of prevention is better than a pound of cure.
Education & Training
Medical School
Wayne State University, School of Medicine, Detroit, MI, Doctorate of Medicine, 1990
Residency
Internal Medicine, Blodgett Memorial Medical Center, Saint Mary's Health Service Program, Grand Rapids, MI, 1991-1993
Certifications
Conditions Treated
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Frequently Asked Questions
Dr. Hamaker manages a broad range of chronic and preventive health concerns. His primary focus includes type 2 diabetes, hypertension, high cholesterol, atrial fibrillation, and thyroid disorders. He also co-manages patients with multiple sclerosis alongside their neurologist.
Yes. Dr. Hamaker holds board certification from the American Board of Internal Medicine. He completed his residency training in Internal Medicine at Blodgett Memorial Medical Center in Grand Rapids, Michigan.
Dr. Hamaker earned his medical degree from Wayne State University School of Medicine in Detroit in 1990. He completed his internship and Internal Medicine residency at Blodgett Memorial Medical Center, Saint Mary's Health Service Program in Grand Rapids, Michigan, from 1990 to 1993.
Dr. Hamaker prioritizes catching health problems before they escalate. He builds a personalized wellness plan for each patient and conducts comprehensive screenings through the annual MDVIP Wellness Program. He aims to explain medical issues in straightforward language so patients understand their own health.
Yes. Dr. Hamaker is reachable by phone after hours and on weekends. Members can contact him directly for urgent concerns without waiting until the next business day.
Dr. Hamaker does co-manage patients with multiple sclerosis. He coordinates with the patient's neurologist and keeps MS-related considerations in mind when treating other health issues.
Dr. Hamaker holds affiliations with Deaconess Hospital and Integris Baptist Hospital in the Oklahoma City area. These affiliations support continuity of care when patients need hospital-level services.
Dr. Hamaker has been practicing internal medicine for more than 25 years. Several of his patients have maintained a continuous relationship with him spanning over two decades.
Dr. Hamaker is an active member of the Oklahoma State Medical Society and the Oklahoma County Medical Society. These memberships reflect his ongoing engagement with the broader medical community in Oklahoma.
Doctor profile last updated March 26, 2026