Summary

Dr. William Tsai is a family medicine physician who has been caring for patients for three decades. He earned his medical degree from Western University of Health Sciences College of Osteopathic Medicine of the Pacific. His extensive experience allows him to provide comprehensive care for patients of all ages, from pediatric to adult populations. Dr. Tsai is fluent in both Spanish and English, enabling him to serve diverse communities effectively.

Dr. Tsai practices in Upland, California, and is affiliated with San Antonio Regional Hospital. He specializes in managing high blood pressure conditions, including both routine hypertension and emergency situations requiring immediate attention. His practice also focuses on preventive care through depression screenings, health risk assessments, and alcohol use disorder evaluations. Patients have given him an average rating of 4.3 out of 5, reflecting their confidence in his compassionate and thorough approach to family medicine.

Overview based on verified provider data

Quick Facts

  • 4.3
  • 30 years of experience
  • 75 insurance plans accepted
  • speaks Spanish, English
  • Western Univ Health Sci College Of Osteopathic Medicine Of The Pacific
  • 4 written reviews
  • 1 specialty
  • 7 areas of expertise
  • 1 board certification
  • 2 office locations
  • Male

Patients’ Perspective

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

Office Locations

Dr. William T Tsai has 2 locations

Tsai William T Office

510 N 13th Ave Ste 101Upland, CA 91786
Mon8:30 am - 5:00 pm
Tue8:30 am - 5:00 pm
Wed8:30 am - 5:00 pm
Thu8:30 am - 5:00 pm
Fri8:30 am - 5:00 pm
SatClosed
SunClosed

San Antonio Regional Hospital

999 San Bernardino RdUpland, CA 91786

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Dr. William T TsaiDr. Mona Salib Ghobrial, MDDr. Samantha Von Ins, MDMichael Benavidez, DO
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
3.7 
30 Years of Experience 16 Years of Experience 34 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available No Virtual Visit Option
Speaks Spanish, English Speaks English, Arabic Speaks Spanish, Vietnamese Speaks English, Spanish
Upland , CANewport Beach , CAPlacentia , CAUpland , CA
Med School: Western Univ Health Sci College Of Osteopathic Medicine Of The Pacific Med School: Ain Shams University, Bachelor of Medicine, Bachelor of Surgery Med School: University Of California Irvine College Of Medicine Med School: Western University of Health Sciences
Current Profile
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Insurance Plans Accepted by Dr. William T Tsai

  • AARP
  • Adventist Health
  • Aetna
  • Aetna - HMO
  • Alignment Health Plan
  • Alignment Health Plan - HMO
  • AlphaCare
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Illinois
  • Blue Cross Blue Shield of Kansas City
  • Blue Cross Blue Shield of Nebraska
  • Blue Cross Blue Shield of North Carolina
  • Blue Cross Blue Shield of North Dakota
  • BLUE CROSS of CALIFORNIA
  • BLUE CROSS of CALIFORNIA - HMO
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Brand New Day
  • Bright Health
  • CalOptima
  • CareMore
  • CareSource
  • Central California Alliance for Health
  • Cigna
  • Cigna - PPO
  • Commonwealth Care Alliance
  • Community Health Choice
  • Community Health Group
  • Contra Costa Health Plan
  • Fidelis Care (NY)
  • Florida Blue: Blue Cross Blue Shield of Florida
  • Golden State Medicare Health Plan
  • Golden State Medicare Health Plan - Medicare
  • Harvard Pilgrim Health Care
  • Health Net
  • Health Net - HMO
  • HealthFirst (NY)
  • Humana
  • Humana - HMO
  • Imperial Health Plan of California
  • Inland Empire Health Plan
  • Inland Empire Health Plan - HMO
  • Kaiser Permanente
  • Kaiser Permanente - Medicare
  • L.A. Care Health Plan
  • L.A. Care Health Plan - HMO
  • Magellan Health
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - IPA
  • Medicare - Medicaid
  • Medicare - Medicaid (Managed)
  • Medicare - Medicare
  • Mercy Care
  • Molina Healthcare
  • Molina Healthcare - HMO
  • Molina Healthcare - Medicaid (Managed)
  • Mutual of Omaha
  • Optima Health
  • Optum Health
  • Oscar Health Insurance
  • Premier Health Plan
  • SCAN Health Plan
  • SCAN Health Plan - HMO
  • SCAN Health Plan - Medicare (Advantage HMO)
  • STLDentalPlan| LLC
  • Travelers - Workers’ Compensation
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - PPO
  • Wellcare
  • Western Health Advantage

Medical Specialties

Dr. William T Tsai has the following specialty

Specialty Expertise

Dr. William T Tsai has the following 7 areas of expertise

  • Check-up
  • Contraception
  • Family Planning
  • Immunization
  • Influenza
  • Weight Loss
  • Weight Loss (non-surgical)

Certifications, License, & Education

30 Years Experience

Dr. William T Tsai holds an active medical license in the state of California.

Medical License

Doctor Of Osteopathy with an active medical license in the state of California that expires in 2026.

Education & Training

Medical School

Graduated from Western Univ Health Sci College Of Osteopathic Medicine Of The Pacific in 1996.

NPI Number

Dr. Tsai's NPI number is 1285620443.

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Frequently Asked Questions

What languages does Dr. William T Tsai speak?
Dr. William T Tsai speaks Spanish and English.
How can I make an appointment with Dr. William T Tsai?
You can find contact information for Dr. William T Tsai here on Vitals.
Does Dr. William T Tsai accept virtual/telehealth appointments?
Dr. William T Tsai has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. William T Tsai's office located?
Dr. William T Tsai's office is located at 510 N 13th Ave Ste 101, Upland, CA, 91786.
Does Dr. William T Tsai accept my insurance?
You can see the insurance plans that Dr. William T Tsai accepts on their Vitals profile.

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