Skip to main content

Health care

We provide affordable and personalized care

How can we help?

Helpful links

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play

Thomas Rey Yamamoto, MD

Please contact to confirm appointment availability

Optum Provider

Please contact to confirm appointment availability

Specialty

Obstetrics & Gynecology

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.3

26 reviews

    • Reviewed on Apr 10, 2026
    • Verified Review

    Because he is thorough, kind, compassionate, communicative and likeable. ♥

    • Reviewed on Apr 9, 2026
    • Verified Review

    Because I was very satisfied with the care that I received from Dr. Yamamoto , he was very patient and he took time to explain everything regarding the procedure that he was going to perform, which made me comfortable.

    • Reviewed on Apr 2, 2026
    • Verified Review

    Terrible experience this doctor doesn’t care about my care. He didn’t want to let me tell him about my past medical history. Past medical history was an important key factor of why is was visiting him. Incompetent doctor. I felt he was dismissive about everything I conveyed to him about my discomfort and pain.

    • Reviewed on Mar 31, 2026
    • Verified Review

    mansplanning what a pab smear is to me, as a grown woman who's gotten them before??? The most painful and unprofessional colposcopy I've had before; I will not be returning.

    • Reviewed on Mar 21, 2026
    • Verified Review

    He was polite, informative

    • Reviewed on Mar 7, 2026
    • Verified Review

    Dr. Yamamoto was very informative about my condition and worked to find a a solution for me.

    • Reviewed on Feb 21, 2026
    • Verified Review

    Does not care about patient

    • Reviewed on Feb 21, 2026
    • Verified Review

    He let me know what was being done and every steps that he was doing during my examination. I was well informed on what to expect and a few days after, he called to let me know the results of my biopsy.

    • Reviewed on Feb 5, 2026
    • Verified Review

    He is an exelent Doctor and cares

    • Reviewed on Jan 18, 2026
    • Verified Review

    Detailed

    • Reviewed on Dec 31, 2025
    • Verified Review

    good service, very knowledgeable.

    • Reviewed on Dec 27, 2025
    • Verified Review

    He’s very nice and straightforward. He made me feel comfortable during my visit.

    • Reviewed on Dec 21, 2025
    • Verified Review

    Henis patient, kind, and very knowledgeable.

    • Reviewed on Nov 30, 2025
    • Verified Review

    He was very condescending and dismissive of my personal concerns. Wasted my time with him

    • Reviewed on Nov 19, 2025
    • Verified Review

    Needs to be kinder

    • Reviewed on Oct 23, 2025
    • Verified Review

    Ive been going to him for years, always polite conversation before exam.

    • Reviewed on Oct 23, 2025
    • Verified Review

    Knowledgeable

    • Reviewed on Oct 21, 2025
    • Verified Review

    He was very courteous and explained the procedure I needed and not needed.

    • Reviewed on Oct 17, 2025
    • Verified Review

    He listened to my concerns and provided appropriate care including testing.

    • Reviewed on Sep 21, 2025
    • Verified Review

    He was kind and a great listener. Very informant .explained what and why

Page 1 of 2
  • About Thomas Rey Yamamoto, MD

    Thomas Yamamoto, MD, is board certified in obstetrics and gynecology, with more than 26 years of experience. He earned his medical degree from UC San Diego School of Medicine. Dr. Yamamoto chose a career in medicine because of his interest in the human body and the challenges it poses. He became an OB-GYN doctor because of the skill and assistance he could provide expectant mothers at a special time in their lives. Dr. Yamamoto's patients say that he is a good listener, and takes extra time to address their questions and concerns. In his spare time, he plays music, collects vintage guitars, and travels. In addition to English, Dr. Yamamoto speaks basic Spanish.

    Gender

    Male

    Board certifications

    American Board of Obstetrics & Gynecology

    Licenses

    CA, G66872

    Employed or contracted

    Employed

    Network Name

    OptumCare HealthCarePartners California

    NPI

    1083633457

    Hospital affiliations

    USC Arcadia Hospital

  • Medical School

    • University of California - San Diego

      1984

    Residency

    • Kaiser Foundation Hospital

      Obstetrics & Gynecology

      1988