Browse Health
Gastroenterologist (digestive)
24 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 (5)

The overall average patient rating of Dr. Francis Yao is Good. Dr. Yao has been reviewed by 5 patients who have provided 5 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 3.2
Promptness 2.9
Courteous Staff 3.2
Accurate Diagnosis 3.7
Bedside Manner 3.7
Spends Time with Me 3.1
Follows Up After Visit 3.4

Specialties & Research

Dr. Francis Yao, MD is board certified in Gastroenterology.

  • He has special expertise in 8 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis B
  • Hepatitis C
  • Hepatocellular Carcinoma
  • Irritable Bowel Syndrome (IBS)
  • Liver Cancer
  • Ulcerative Colitis

Education & Awards

Dr. Yao graduated from Yeshiva University, Bronx.


Dr. Yao has 7 hospital affiliations:

  • John Muir Medical Center, Walnut Creek Campus 
  • California Pacific Medical Center - Davies Campus 


  • Mandarin
  • Chinese

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Additional Information
Dr. Francis Yung-Kang Yao MD is a male Internist, has 24 years of experience and practices in Gastroenterology.
Where does Dr. Francis Y. Yao practice?
Dr. Francis Yao has 3 office locations.
Dr. Francis Yao practices Gastroenterology near San Francisco, CA.
Additional practice locations include: San Jose, CA.
See San Francisco Gastroenterologists.