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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 (0)

The overall average patient rating of Dr. Ruben Lewin is Excellent. Dr. Lewin has been reviewed by 7 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.6
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

  • He has special expertise in 7 areas:
  • Acute Coronary Syndrome (ACS)
  • Cardiovascular Disease
  • Diabetes
  • Heart Block
  • High Blood Pressure (Hypertension)
  • High Cholesterol (Hypercholesterolemia)
  • Unstable Angina

Education & Awards

Dr. Lewin graduated from Universidad De Buenos Aires. He has 2 awards.

Patients' Choice Award (2008 - 2009, 2012)
Compassionate Doctor Recognition (2014)


Dr. Lewin has 17 hospital affiliations:

  • Aurora Sinai Medical Center 
  • St. Michael Hospital-Milwaukee 


  • Hebrew
  • Spanish
  • Italian
  • English

> > > > Dr. Ruben Lewin, MD

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Additional Information
Dr. Ruben F Lewin MD is a male Internist, has 37 years of experience and practices in Cardiology.
Where does Dr. Ruben F. Lewin practice?
Dr. Ruben Lewin has 8 office locations.
Dr. Ruben Lewin practices Cardiology near Milwaukee, WI.
Additional practice locations include: Franklin, WI.
See Milwaukee Cardiologists.