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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 (19)

The overall average patient rating of Dr. Roger Kao, Gastroenterologist and Hepatologist is Excellent. Dr. Kao has been reviewed by 22 patients who have provided 19 comments. The rating is 5 out of 5 stars.

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

Specialties & Research

Dr. Roger Kao, MD is board certified in Gastroenterology.

  • He has special expertise in 34 areas:
  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Anal Ulcer (Fissure in Ano)
  • Anemia
  • Barrett Esophagus
  • Celiac Disease
  • Collagenous Colitis
  • Colonic Diverticulosis
  • Colonic Polyps
  • Colonoscopy
  • Constipation
  • Crohn's Disease
  • Diarrhea
  • Diverticulitis
  • Dyspepsia
  • Esophageal and Gastric Varices
  • Fatty Liver
  • Flatulence
  • Gallbladder Diseases
  • Gallstones
  • > Show all expertise

Education & Awards

Dr. Kao graduated from Rosalind Franklin University, North Chicago. He has 6 awards.

Patients' Choice 5th Anniversary Award (2014)
Patients' Choice Award (2010 - 2014)
Compassionate Doctor Recognition (2011 - 2014)
Top 10 Doctor - City (2014)
Chicago, IL
Top 10 Doctor - State (2014)
On-Time Doctor Award (2014)


Dr. Kao has 4 hospital affiliations:

  • Stanford Hospital and Clinics 
  • Sequoia Hospital 


  • Mandarin
  • Italian
  • Chinese
  • Spanish
  • English

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Additional Information
Dr. Roger Kao MD is a male Internist, has 13 years of experience and practices in Gastroenterology.
Where does Dr. Roger Kao practice?
Dr. Roger Kao has 1 office location.
Dr. Roger Kao practices Gastroenterology near San Carlos, CA.
See San Carlos Gastroenterologists.