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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 (1)

The overall average patient rating of Dr. Diana Westerfield is Excellent. Dr. Westerfield has been reviewed by 5 patients who have provided 1 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0

Specialties & Research

  • She has special expertise in 4 areas:
  • Acute Coronary Syndrome (ACS)
  • Heart Block
  • High Blood Pressure (Hypertension)
  • Unstable Angina

Education & Awards

Dr. Westerfield graduated from A.T. Still University - Kirksville. She has 2 awards.

Recognized as a "Best Doctor " in the August 2012 issue of St. Louis Magazine.
Patients' Choice Award (2014)


Dr. Westerfield has 7 hospital affiliations:

  • Missouri Baptist Hospital Sullivan 
  • Missouri Baptist Medical Center 

> > > > Dr. Diana Westerfield, DO

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Additional Information
Dr. Diana Westerfield DO is a female Internist, has 19 years of experience and practices in Cardiovascular Disease.
Where does Dr. Diana Westerfield practice?
Dr. Diana Westerfield has 4 office locations.
Dr. Diana Westerfield practices Cardiovascular Disease near Saint Louis, MO.
Additional practice locations include: Saint Peters, MO and O Fallon, MO.
See Saint Louis Cardiologists.