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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).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Andrew Keller, Cardiologist is Good. Dr. Keller has been reviewed by 10 patients who have provided 3 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 2.7
Courteous Staff 3.2
Accurate Diagnosis 3.4
Bedside Manner 3.2
Spends Time with Me 3.4
Follows Up After Visit 3.4

Specialties & Research

Dr. Andrew Keller, MD is board certified in Cardiovascular Disease.

  • He has special expertise in 6 areas:
  • Acute Coronary Syndrome (ACS)
  • Echocardiography
  • Heart Block
  • High Blood Pressure (Hypertension)
  • High Cholesterol (Hypercholesterolemia)
  • Unstable Angina

Education & Awards

Dr. Keller graduated from The Ohio State University , Columbus. He has 1 awards.

Castle Connolly Top Doctors: New York Metro Area™ (2007 - 2008, 2010 - 2015)


Dr. Keller has 9 hospital affiliations:

  • Danbury Hospital 
  • New York Presbyterian Hospital / Columbia 


  • Portuguese
  • Spanish

> > > > Dr. Andrew Keller, MD

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Additional Information
Dr. Andrew Keller MD is a male Internist, has 32 years of experience and practices in Cardiovascular Disease.
Where does Dr. Andrew Keller practice?
Dr. Andrew Keller has 6 office locations.
Dr. Andrew Keller practices Cardiovascular Disease near Southbury, CT.
Additional practice locations include: Danbury, CT and Ridgefield, CT.
See Southbury Cardiologists.