John Brennan, MD

Dr. John Brennan is a Pulmonologist in Exeter, New Hampshire. Dr. Brennan is board certified in Internal Medicine, Critical Care Medicine and Pulmonary Medicine. His clinical interests include multidisciplinary lung cancer care, endobronchial ultrasound, navigational bronchoscopy, pulmonary nodules, general pulmonology and critical care.

Dr. Brennan has been recognized as a Top Doctor in Pulmonology by NH Magazine.

  • Undergraduate: Tufts University, Boston, MA
  • Graduate: Tufts University School of Medicine, Boston MA
Rhode Island Hospital/Miriam Hospital Brown Medical School, Providence, RI
Pulmonary and Critical Care Medicine, Tufts Medical Center, Boston, MA
Board Certified
Internal Medicine, Critical Care Medicine, Pulmonary Medicine

Patient Rating
4.9 out of 5
192 Ratings


Core Physicians
3 Alumni Drive
Exeter, NH 03833
Phone: (603) 775-0234
Fax: (603) 772-1188
Hours: Monday - Friday 8:30am - 12:00pm, 1:00pm - 5:00pm

Verified Patient Reviews & Comments

The Patient Rating score is an average of all responses to physician related questions on our nationally-recognized Patient Experience Survey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments also are gathered from our Patient Experience Survey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

He is thorough listens very nice shows you what is going on and explains


Listened and changed or added meds that would help my condition. He had read my files and knew exactly what my concerns would be. Very personable and respectful!


To go see him he great dr


Very kind and caring


Dr Brennan is simply the best. Made us feel comfortable and explained everything.


That dr Brennan is one of the best doctors that i have delt with and I have had many. He listens to me and then explains my problems where i understand what's he saying. He has done wonderful thing's for me. There's just not enough thing's I can say about how good he is. I am so grateful too have him. Thank you Dr Brennan


He is very good.


He is caring and explains things well.


What I could say about Dr. Brennan is he's right on the ball when he talks to you and awesome guy down to earth explains things very easy on layman terms I should say and I'd highly recommend him. I went to other hospitals in the past and I felt like a number there. I'm very pleased with him and Exeter Hospital.


Dr Brennan is a wonderful physician. He is extremely knowledgeable and concerned about his patients. I would highly recommend him to anyone looking for a pulmonologist.

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