IM Faculty
​​A full-time faculty comprised of board certified internists and sub specialists in the areas of critical care medicine, infectious disea​se, pulmonary medicine and endocrinology, in conjunction with more than 40 clinical attending faculty permits in-depth, one-on-one academic teaching environment for residents. All hold faculty appointments from CMU.

​Josephine Patricia Dhar, MD
Program Director

Dr. Dhar received her medical degree from Wayne State University School of Medicine and completed her Residency with Wayne State University Affiliated Hospital Training Program, Internal Medicine - Detroit, Michigan. She also completed a fellowship in Rheumatology from Wayne State University School of Medicine and is board certified in Internal Medicine and Rheumatology. Dr. Dhar joined CMU Health in 2014.

​Marilyn Haupt, MD

Dr. Haupt received her medical degree from Cornell University Medical College in New York and trained in Internal Medicine and Critical Care Medicine at North Shore University Hospital, Memorial-Sloan Kettering, and Albany Medical College. She has been a faculty member and employee at Wayne State University School of Medicine, Oregon Health & Science University, and Geisinger Health System. Dr. Haupt joined CMU Health in 2011 and brings administrative, research and clinical experience to the organization. She also practices critical care medicine in Saginaw at St. Mary's of Michigan and Covenant Healthcare.

  Vivek Variar, MD

Dr. Variar completed his medical education at Manipal College of Medical Sciences in Pokhara, Nepal in 200​4. He did his internship from Kasturba Medical College, Manipal, India and received his medical degree in 2005. Dr. Variar completed his residency in Internal Medicine at Synergy Medical/CMU Health in 2011. He also served as Chief resident for student academics in his final year of residency training. He is board certified in Internal Medicine. Dr. Variar joined Synergy/CMU Health in 2012, where he provides excellent patient care. He has special interests in academic internal medicine and in patients with neurologic problems. He is a vital part of the teaching staff and currently works closely with residents and students in our ambulatory clinic setting.



Ali Karrar, MD, MRCP

Dr. Karrar is an accomplished Internist and Rheumatologist. He completed his Bachelor's and Master's degrees at the University of Khartoum in Sudan. He has completed a Fellowship in Internal Medicine/Rheumatology in Saudi Arabia and a Fellowship in Rheumatology in the United Kingdom. Here in the United States, Dr. Karrar completed his Residency in Internal Medicine at Hurley Medical Center through Michigan State University, where he was awarded the Dr. R. Roderic Abbott, Distinguished Resident Award. He then completed his Fellowship in Rheumatology at Rush Presbyterian St. Luke's Medical Center in Chicago, IL though Rush University. Dr. Karrar joined the Internal Medicine Department at CMU Health in January of 2011, to provide part-time rheumatology services on a referral basis. He is also on staff on the Michigan Rheumatology Group in Grand Blanc. Dr. Karrar is certified by the American Board of Rheumatology and the American Board of Internal Medicine. He is a Member of the Royal College of Physicians in the United Kingdom, the American College of Physicians, and the American Society of Internal Medicine.


  David Nadolski, MD,

Dr. Nadolski is a certified Internist and Lipidologist. He graduated from Wayne State University School of Medicine and completed his Internship and Residency at the Henry Ford Hospital in Detroit. Dr. Nadolski joined the Internal Medicine Department at CMU Health in July of 2010 as a part-time faculty member. He is a member of the Michigan State Medical Society, the Midland County Medical Society, and the International Society of Clinical Densitometry. Dr. Nadolski has served as a guest speaker, throughout the region, on the topics of hyperlipidemia, essential hypertension, and osteoporosis. Dr. Nadolski also has an Internal Medicine practice in Midland.