Summary

Dr. Howard Cooper Masuoka is a gastroenterologist with 23 years of experience treating digestive system disorders. They completed their medical education at the University of Alabama School of Medicine and have built extensive expertise in liver conditions and metabolic health. Dr. Masuoka speaks both English and Spanish, helping them connect with diverse patient communities.

Dr. Masuoka practices in Pleasanton, California, and maintains affiliations with several renowned medical centers including Stanford Hospital, Stanford Health Care, and Indiana University Health Hospital. They specialize in treating serious liver conditions such as cirrhosis and nonalcoholic fatty liver disease. Their practice also includes managing high cholesterol in children and teens. Patients have given Dr. Masuoka an average rating of 3.2 stars for their care.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 3.1
  • 23 years of experience
  • speaks English, Spanish
  • University Of Alabama School Of Medicine
  • 1 written review
  • 2 specialties
  • 14 areas of expertise
  • 2 board certifications
  • 11 hospital affiliations
  • 1 office location

Patients’ Perspective

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

Office Location

Howard Cooper Masuoka

5565 W Las Positas BlvdPleasanton, CA 94588
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

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Howard Cooper MasuokaDr. Sidhartha SinhaMounzer Al Samman, MDDr. Sundeep Singh
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.1 
3.4 
23 Years of Experience 19 Years of Experience 39 Years of Experience 19 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks English, Spanish Speaks English
Pleasanton , CAPalo Alto , CAVacaville , CAStanford , CA
Med School: University Of Alabama School Of Medicine Med School: University Of California San Francisco School Of Medicine Med School: University Of Aleppo Faculty Of Medicine Med School: UNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Current Profile
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Insurance Plans Accepted by Howard Cooper Masuoka

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Howard Cooper Masuoka has the following 2 specialties

Specialty Expertise

Howard Cooper Masuoka has the following 14 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Bile Duct Diseases
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Gastroenterologist
  • Hemorrhoids
  • Hepatitis
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Liver Cancer
  • Ulcerative Colitis

Certifications, License, & Education

23 Years Experience

Howard Cooper Masuoka holds expired and active medical licenses in the states of Indiana and California.

Medical License

Medical Doctor with an expired medical license in the state of Indiana that expired in 2025 and an active medical license in the state of California that expires in 2027.

Education & Training

Medical School

Graduated from University Of Alabama School Of Medicine in 2003.

NPI Number

Howard Cooper Masuoka's NPI number is 1770630162.

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Frequently Asked Questions

What languages does Howard Cooper Masuoka speak?
Howard Cooper Masuoka speaks English and Spanish.
Is Howard Cooper Masuoka accepting new patients?
Howard Cooper Masuoka is accepting new patients on Vitals. View Howard Cooper Masuoka's profile on Vitals to make an appointment.
Does Howard Cooper Masuoka accept virtual/telehealth appointments?
Howard Cooper Masuoka has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Howard Cooper Masuoka's office located?
Howard Cooper Masuoka's office is located at 5565 W Las Positas Blvd, Pleasanton, CA, 94588.
Does Howard Cooper Masuoka accept my insurance?
You can see the insurance plans that Howard Cooper Masuoka accepts on their Vitals profile.

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