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 for every year since 2017!

  • 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
4.8 out of 5
133 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.

Nothing- seldom provide recommendations


Thorough and patient. Great bedside manner.


Excellent provider. Knew his subject matter and I felt at ease and informed when The visit was over.


To try him.


He is definitely a very great intelligent snot doctor. I've been with him for year and I have recommended him, to my sister and she does see him as a patient and I would recommend him to my friends and other family members.


Explained everything as best he could. Will be consulting with fellow physicians to help explain the prognosis.


Would highly recommend.


He does not seem ready to speak to me. I assume he reads my history when he is on the phone with me


He's very tells what you the truth is and I like him very much and I will tell anybody to go to him.


I would highly recommend this practice, particularly Dr Brennan and Denise.

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