Internal Medicine


Board Certified Internal Medicine

Medical School: Michigan State University, College of Osteopathic Medicine, East Lansing, MI

Residency: Michigan State University, Sparrow Hospital, East Lansing, MI

Dr. Sue Castleman is an osteopathic physician who takes an integrative approach to her patients’ medical care. She is board certified in internal medicine. She also practices medical acupuncture and incorporates osteopathic manipulative treatment (OMT) when feasible and appropriate.

She graduated from MSU College of Osteopathic Medicine in 2006 and completed her Internal Medicine residency in 2009, but she considers her earliest medical education to have started during her childhood in Michigan. Her fascination with medicine and the desire to help people began while frequenting her father’s primary care office and joining him on house calls. “In those days, general practitioners did it all including delivering babies, overseeing patients in the hospital, running a busy outpatient practice as well as doing general surgeries,” she says. Dr. Castleman recalls her father’s caring and comforting manner with patients, as well as his good humor, and she says that this, above all things, has influenced her overriding approach with her own patients. She values the importance of developing a collaborative doctor – patient relationship, which she feels is key in effectively managing their health. By connecting with her patients and setting them at ease, Dr. Castleman fosters a positive working relationship built on trust and genuine concern. She has been described by patients as honest, caring, down-to-earth and as someone who really listens.

Dr. Castleman sees adults of all ages, but she especially loves working with seniors. As an internist, she has held a variety of roles including a primary care physician, hospitalist and hospice medical director, in addition to running her own private internal medicine practice in Sonora, California. Her approach to health care planning and preventative care incorporates fitness, a healthy diet and stress reduction, the combination of which can result in a decrease or elimination of the need for some medications and can reduce other risks for illness.

Dr. Castleman holds a Masters in Clinical Social Work, has a background in musical theater including work as a stage actress in New York City, and taught piano before she found her calling in medicine. When Dr. Castleman is not busy caring for patients, she enjoys spending time with her three adult sons, one daughter-in-law, and two cats. She stays active by drumming with Sonoma County Taiko, running, roller skating with her roller derby team, hiking and simply enjoying life in Sonoma County, which she has called home for over three years now. Dr. Castleman feels like she has landed right where she is meant to be and looks forward to spending many more years discovering the beauty of the Sonoma County landscape, and meeting and working with the friendliest people she has had the pleasure of knowing.

Primary Location

Healdsburg Physician Group
1312 Prentice Drive
Healdsburg, CA, CA 95448
Phone: 707-433-3383
Fax: 707-433-7210