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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. John Klemperer:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. John Klemperer is Average. Dr. Klemperer has been reviewed by 2 patients who have provided 0 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 3.0
Accurate Diagnosis 3.0
Bedside Manner 3.0
Spends Time with Me 3.0
Follows Up After Visit 3.0

Specialties & Research

Dr. John Klemperer, MD is board certified in Surgery and Thoracic Surgery (Cardiothoracic Vascular Surgery).

  • He has special expertise in 2 areas:
  • Cardiopulmonary Bypass (CPB)
  • Coronary Artery Bypass (Heart Bypass)

Education & Awards

Dr. Klemperer graduated from State University of New York at Buffalo.


Dr. Klemperer has 2 hospital affiliations:

  • Eastern Maine Medical Center 
  • St Joseph Hospital 


  • Spanish

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Additional Information
Dr. John Dean Klemperer MD is a male Surgeon, has 21 years of experience and practices in Surgery, Thoracic Surgery, and Cardiothoracic Vascular Surgery.
Where does Dr. John D. Klemperer practice?
Dr. John Klemperer has 1 office location.
Dr. John Klemperer practices Surgery, Thoracic Surgery, and Cardiothoracic Vascular Surgery near Bangor, ME.
See Bangor Surgeons.