Browse Health
13 years of experience
Accepting new patients
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 (165)

The overall average patient rating of Dr. Sean To is Excellent. Dr. To has been reviewed by 1216 patients who have provided 165 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.5
Promptness 4.2
Courteous Staff 4.2
Accurate Diagnosis 4.1
Bedside Manner 4.3
Spends Time with Me 4.5
Follows Up After Visit 3.9

Education & Awards

Dr. To graduated from Rosalind Franklin University, North Chicago. He has 2 awards.

Patients' Choice Award (2008, 2013 - 2015)
Compassionate Doctor Recognition (2013)


Dr. To has 7 hospital affiliations:

  • Southwest Healthcare Sys-Murrietta 
  • San Antonio Community Hospital 


  • Chinese
  • Mandarin
  • Vietnamese

Similar doctors nearby

Dr. Robert Kirshbaum

Internal Medicine
48 years experience
Rancho Cucamonga, CA

Dr. Richard Horns

Internal Medicine
36 years experience
Rancho Cucamonga, CA

Dr. Bhupal Kommineni

Internal Medicine
41 years experience
Upland, CA

Dr. Hossein Dehghani

Internal Medicine
7 years experience
Upland, CA

Dr. Byung Ahn

Internal Medicine
33 years experience
Upland, CA

Dr. Padmini Tummala

Internal Medicine
20 years experience
Upland, CA
Search All Similar Doctors
Additional Information
Dr. Sean S To MD is a male Internist, has 13 years of experience and practices in Internal Medicine.
Where does Dr. Sean S. To practice?
Dr. Sean To has 1 office location.
Dr. Sean To practices Internal Medicine near Rancho Cucamonga, CA.
See Rancho Cucamonga Internists.