Barbara Fretwell, M.D.

Barbara Fretwell, M.D.

Dr. Barbara Fretwell is a board-certified internal medicine specialist with an office-based primary care practice. She cares for adult patients in the CIMA Lansing office. She has been with CIMA since 2003.


Dr. Fretwell grew up in Buffalo, NY, where she attended the The Buffalo Seminary, graduating in 1971. Dr. Fretwell earned her undergraduate degree from Harvard College in 1975. While there, she played ‘cello in college orchestra and in chamber music groups.

In 1979, Dr. Fretwell graduated from medical school at the State University of New York at Buffalo School of Medicine. Her internship in internal medicine was at the University of Maryland Hospital, Baltimore, Maryland, from July 1979 to June 1980. She completed her internal medicine residency at South Baltimore General Hospital (affiliated with University of Maryland Hospital) in Baltimore, Maryland from July 1980-June 1983, including one year as Chief Resident. After completion of residency, Dr. Fretwell worked in the emergency room at South Baltimore General Hospital from until 1985, and with Blue Care Network as a staff model physician in internal medicine from 1985 to May 2003. She has been with CIMA since 2003.

Dr. Fretwell is a member of The American College of Physicians, and was board-certified by The American Board of Internal Medicine in 1986.

She has an office-based practice, and sees patients 5 days a week. Her hospitalized patients are seen by the CIMA Hospitalists.

The area of medicine which interests her the most is office-based primary care internal medicine. This includes preventive care, acute care, and care of chronic illnesses. She enjoys having an office-based internal medicine practice because it allows her to get to know her patients over a period of time.

“My professional goal as a physician is to give the best care I can to my patients, by knowing them, listening to them, being aware of the medical literature, and communicating clearly.”


She is married to Peter Cooke, who is also an internal medicine physician. They have three children (born in 1983, 1987, and 1990).

Her hobbies and special interests are music (especially classical music), gardening, reading, teaching pre-school Sunday school, and playing hand bells in her church bell choir.