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 (7)

The overall average patient rating of Dr. William Lee is Excellent. Dr. Lee has been reviewed by 12 patients who have provided 7 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.0
Promptness 4.0
Courteous Staff 4.1
Accurate Diagnosis 4.6
Bedside Manner 4.4
Spends Time with Me 4.3
Follows Up After Visit 4.0

Specialties & Research

Dr. William Lee, MD is board certified in Internal Medicine.

Education & Awards

Dr. Lee graduated from New York University. He has 3 awards.

Patients' Choice Award (2013)
Compassionate Doctor Recognition (2013)
Top 10 Doctor - City (2014)
Simi Valley, CA


Dr. Lee has 11 hospital affiliations:

  • Simi Valley Hospital 
  • San Antonio Community Hospital 


  • Tagalog
  • Chinese

> > > > Dr. William Lee, MD

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Additional Information
Dr. William Ang Lee MD is a male Internist, has 28 years of experience and practices in Internal Medicine.
Where does Dr. William A. Lee practice?
Dr. William Lee has 4 office locations.
Dr. William Lee practices Internal Medicine near Simi Valley, CA.
Additional practice locations include: Thousand Oaks, CA and Northridge, CA.
See Simi Valley Internists.