Summary

Dr. Wei-Fang Ko is a gastroenterologist with four decades of medical experience treating digestive system disorders. He earned his medical degree from Taipei Medical University and has built extensive expertise in diagnosing and treating conditions affecting the stomach, intestines, and related organs. Dr. Ko provides care in both English and Spanish to serve his diverse patient community.

Dr. Ko practices at Saint Rose Hospital and maintains locations in Castro Valley, California. He specializes in treating colon polyps, hemorrhoids, and abdominal pain through advanced diagnostic techniques. His expertise includes performing colonoscopies and lower gastrointestinal endoscopy procedures to help patients maintain digestive health. Patients rate Dr. Ko 4.2 out of 5 stars for his compassionate care and clinical expertise.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.2
  • 40 years of experience
  • 51 insurance plans accepted
  • speaks English, Spanish
  • University Of Minnesota Medical School
  • 18 written reviews
  • 1 specialty
  • 10 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 2 office locations
  • Male

Office Locations

Dr. Wei-Fang Ko has 2 locations

Gastroenterology Medical Specialist

19845 Lake Chabot Rd Ste 104Castro Valley, CA 94546
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 5:00 pm
SatClosed
SunClosed

Sutter Eden Medical Center

20103 Lake Chabot RdCastro Valley, CA 94546

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Dr. Wei-Fang Ko, MDChimdi Mfebe, APRNTheresa Obonyano, APRNDr. Renumathy Dhanasekaran
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.2 
40 Years of Experience 21 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks English Speaks Spanish, Chinese, English
Castro Valley , CALittle Rock , ARSACRAMENTO , CAStanford , CA
Med School: University Of Minnesota Medical School Med School: Chamberlain University College of Nursing Med School: The University of Texas Health Science Center at Houston Med School: Bangalore Medical College And Research Institute
Current Profile
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Insurance Plans Accepted by Dr. Wei-Fang Ko

  • Accepts Medicaid
  • Aetna
  • Aetna - HMO
  • Aetna - Medicare
  • Affinity Health Plan
  • Affinity Health Plan - Medicare (Advantage HMO)
  • Alameda Alliance for Health
  • Alignment Health Plan
  • Alignment Health Plan - HMO
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield of Oklahoma
  • Blue Cross Blue Shield of Tennessee
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • BLUE CROSS of CALIFORNIA - Medicare (Advantage HMO)
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Brand New Day
  • CareFirst Blue Cross Blue Shield
  • CareFirst Blue Cross Blue Shield - HMO
  • Central California Alliance for Health
  • Cigna
  • GEHA
  • Golden State Medicare Health Plan
  • Golden State Medicare Health Plan - Medicare
  • Health Net - HMO
  • Health Plan of San Mateo
  • Humana
  • Imperial Health Plan of California
  • Kaiser Permanente
  • Kaiser Permanente - HMO
  • Medica
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Medicare - Medicare (Advantage HMO)
  • Meritain Health
  • Molina Healthcare
  • Optimum HealthCare
  • Optimum HealthCare - Medicare (Advantage HMO)
  • Priority Health
  • Santa Clara Family Health Plan
  • SCAN Health Plan
  • SCAN Health Plan - HMO
  • Sutter Health Plus
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare
  • UnitedHealthcare Community Plan
  • UnitedHealthcare Oxford

Medical Specialties

Dr. Wei-Fang Ko has the following specialty

Specialty Expertise

Dr. Wei-Fang Ko has the following 10 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

40 Years Experience

MEDICAL LICENSE

Medical Doctor, California, 2026, Active

EDUCATION & TRAINING

Medical School

University Of Minnesota Medical School
Taipei Medical UniversityGraduated in 1986

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Frequently Asked Questions

Where is Dr. Wei-Fang Ko's office located?
Dr. Wei-Fang Ko's office is located at 19845 Lake Chabot Rd Ste 104, Castro Valley, CA, 94546.
Does Dr. Wei-Fang Ko accept virtual/telehealth appointments?
Dr. Wei-Fang Ko has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Is Dr. Wei-Fang Ko accepting new patients?
Dr. Wei-Fang Ko is accepting new patients on Vitals. View Dr. Wei-Fang Ko's profile on Vitals to make an appointment.
What languages does Dr. Wei-Fang Ko speak?
Dr. Wei-Fang Ko speaks English and Spanish.
How can I make an appointment with Dr. Wei-Fang Ko?
You can find contact information for Dr. Wei-Fang Ko here on Vitals.

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