Our physician partners

Karl Singer, MD

Medical Director

Dr. Karl L. Singer is a geriatrician in Exeter, New Hampshire and is affiliated with Exeter Hospital. He received his medical degree from Harvard Medical School and has been in practice for more than 20 years. His focus is on the unique health needs of the elderly, including chronic diseases, nutritional problems, skin ailments, cognitive loss, memory impairment, adverse affects of medications, immobility and balances issues.

Kristin Vaughan, DO

Family Medicine

Dr. Vaughan grew up in Michigan and received her B.A. from University of Michigan,  M.A. from Goddard College, and Doctor of Osteopathic Medicine  from UNECOM. She has been part of the  RCNH team for past 7 years. Enjoy gardening, travel, boating, pickleball and family time.

Mary Braun, MD

Internal Medicine Physician

Dr. Braun has a specialty level qualification in Hospice and Palliative Medicine. She received her degree from the University of Minnesota and completed her residency at Hennepin County Medical Center in Minneapolis, MN. Her areas of clinical interest include palliative care, chronic disease management, complex medical patients, and hospice.

Heidi Crusberg, MD

Family Physician

After graduating from Vanderbilt University, she attended The Johns Hopkins School of Medicine, where she received her M.D. She completed her family practice residency at The University of Colorado Health Sciences in Lafayette, CO. Dr. Crusberg’s areas of clinical interest include supporting and educating patients on healthy lifestyle choices and chronic disease management. Dr. Crusberg also speaks Spanish.

Bobby Kelly, MD, MPH

Family Medicine

Dr. Kelly graduated from the Drexel University College of Medicine in 2012. He is a Family Medicine physician in Exeter, NH. Dr. Kelly is board certified in Family Medicine and Preventive Medicine and specializes in LGBTQ Health and Medication-Assisted Treatment with buprenorphine, and preventive medicine. 

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Rockingham County Rehabilitation and Nursing Center | 117 North Road Brentwood, NH 03833 | 603-679-5335
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