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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 (2)

The overall average patient rating of Dr. Tom Chang is Good. Dr. Chang has been reviewed by 11 patients who have provided 2 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.5
Promptness 4.5
Courteous Staff 4.7
Accurate Diagnosis 5.0
Bedside Manner 4.7
Spends Time with Me 4.7
Follows Up After Visit 5.0

Specialties & Research

Dr. Tom Chang, MD is board certified in Ophthalmology.

  • He has special expertise in 2 areas:
  • Retina Surgery
  • Retinal Disorders

Education & Awards

Dr. Chang graduated from University Of Toronto Faculty Of Medicine. He has 2 awards.

Patients' Choice Award (2008 - 2011)
Compassionate Doctor Recognition (2011)


Dr. Chang has 15 hospital affiliations:

  • Loma Linda University Medical Center 
  • Presbyterian Intercommunity Hospital 


  • French
  • Chinese
  • Vietnamese
  • Hmong
  • Spanish
  • Mandarin
  • Cantonese
  • English

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Additional Information
Dr. Tom S Chang MD is a male Ophthalmologist, has 24 years of experience and practices in Ophthalmology.
Where does Dr. Tom S. Chang practice?
Dr. Tom Chang has 1 office location.
Dr. Tom Chang practices Ophthalmology near Thousand Oaks, CA.
See Thousand Oaks Ophthalmologists.