Summary

Dr. Wei-Fang Ko treats colon polyps, hemorrhoids, and abdominal pain, and performs lower GI endoscopy, colonoscopy, and upper GI endoscopy. He has practiced gastroenterology for 40 years and is affiliated with Saint Rose Hospital.

Dr. Ko earned his medical degree from Taipei Medical University and sees patients in Castro Valley, California. He speaks English and Spanish.

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 hospital affiliation
  • 2 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

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, MD
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Dr. Wei-Fang Ko, MDMounzer Al Samman, MDDr. David LimsuiDr. Laren Becker
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.2 
4 
5 
3.2 
40 Years of Experience 39 Years of Experience 22 Years of Experience 24 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English, Spanish Speaks English
Castro Valley , CAVacaville , CAPalo Alto , CARedwood City , CA
Med School: University Of Minnesota Medical School Med School: University Of Aleppo Faculty Of Medicine Med School: University Of Illinois At Chicago College Of Medicine Med School: Albert Einstein College Of Medicine Of Yeshiva University
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

Dr. Wei-Fang Ko holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Medical School

Graduated from University Of Minnesota Medical School and Taipei Medical University in 1986.

NPI Number

Dr. Ko's NPI number is 1417068081.

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Frequently Asked Questions

How can I make an appointment with Dr. Wei-Fang Ko?
You can find contact information for Dr. Wei-Fang Ko here on Vitals.
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.
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.
Which hospitals is Dr. Wei-Fang Ko affiliated with?
Dr. Wei-Fang Ko is affiliated with Saint Rose Hospital.
Does Dr. Wei-Fang Ko accept my insurance?
You can see the insurance plans that Dr. Wei-Fang Ko accepts on their Vitals profile.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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