Dr. John Kok-Sen Chan MD is a male Obstetrician & Gynecologist, has 13 years of experience and practices in Ophthalmology and Obstetrics & Gynecology.
Video profile
Dr. John Chan has 2 office locations.
The Permanente Medical Group
3553 Whipple Rd
Union City, CA 94587

Phone Number
Locations and availability (2)
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

  • Currently 4 of 4 stars
Patient comments (0)

The overall average patient rating of Dr. John Chan is Excellent. Dr. Chan has been reviewed by 1 patients who have provided 0 comments. The rating is 4 out of 4 stars.

Patient Ratings
Ease of Appointment 4.0
  • Currently 4 of 4 stars
Promptness 3.0
  • Currently 3 of 4 stars
Courteous Staff 4.0
  • Currently 4 of 4 stars
Accurate Diagnosis 4.0
  • Currently 4 of 4 stars
Bedside Manner 4.0
  • Currently 4 of 4 stars
Spends Time with Me 4.0
  • Currently 4 of 4 stars
Follows Up After Visit 4.0
  • Currently 4 of 4 stars

Specialties & Research

Dr. John Chan, MD is board certified in Ophthalmology.

  • He has special expertise in 3 areas:
  • Gyn Cancer
  • Hot Flashes
  • Menopause

Education & Awards

Dr. Chan graduated from New York Medical College, Valhalla.


Dr. Chan has 6 hospital affiliations:

  • Mills-Peninsula Health Services 
  • Kaiser Foundation Hospital - Hayward 


  • Mandarin
  • Spanish
  • Tagalog

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Additional Information
Where does Dr. John K. Chan practice?
Dr. John Chan practices Ophthalmology and Obstetrics & Gynecology near Union City, CA.
Additional practice locations include: Hayward, CA.
See Union City Ophthalmologists and Union City Obstetricians & Gynecologists.