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
194 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 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.


Dr Brennan listened carefully & gave me a sense of peace knowing the concerns I had were heard. He introduced himself as John, making himself a real person right away & took the time to read the file. A new Rx was prescribed to help with symptoms. I'm looking forward to the follow up appointment. I highly recommend "John" Brennan, MD.


I'm very happy that I found him and he was recommended. Dr. Lanuti gave me his name. And he's excellent. Where I was going was not a good experience. And even though it's a distance, I'm very glad that I'm with him. He's very excellent. And I thank you very much. Have a good evening.


highly recommend


I found it very refreshing that I have a, I found this Dr. Brennan, someone who really listens to the patient. And I actually have told many people since I saw him, oh my God, this is a great doctor at Exeter Hospital. I was very impressed. And I felt that he really listened and was able to discuss the options and the situation, particularly to what was going on with me. He just didn't throw general stuff out. So he was, you know, he was just great, just great. So I can't, I left very happy.


Shows compassion and listens to you without rushing you.


Great doctor knows his profession very well. Has good people skills. If a condition is a little beyond what he is comfortable with he will refer you to the right doctor!


Very good pleasure to take to

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