Accepting New Patients

Mercedes Tomioka, MD, FACP

  • Geriatric Medicine
    (Board Certified)
  • Internal Medicine
    (Board Certified)
Spanish, English
Primary Address | Office Details

16300 Sand Canyon Avenue

Suite 311

Irvine, CA 92618

Phone: (949) 791-3101

Fax: (949) 791-3112

Medical Groups & Affiliations
  • Hoag Medical Group
  • Hoag Physician Partners
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to Your Provider
(949) 791-3101
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  • Meet The Provider

    A native speaker of Spanish and conversational Japanese, Dr. Tomioka brings cultural diversity, excellent skills, and her compassionate nature to her profession as a physician. Her grandparents immigrated to Peru prior to World War II and that is where Dr. Tomioka spent her early years surrounded by family, which included many physicians. Always concerned about everyone around her, her family encouraged her to become a physician to fulfill her desire to help others.

    Practicing since 2003, Dr. Tomioka chose a career in Internal Medicine as she truly appreciates the challenge. She enjoys being exposed to a broad variety of skills and applying her knowledge to help her patients. She is excited to lend her talent and innovative ideas to Hoag Medical Group.

    Dr. Tomioka has extensive training and always pursues ways to improve her skills and knowledge. She attended medical school at Universidad Nacional Mayor de San Marcos in Lima, Peru, completed her residency in Internal Medicine at St. Barnabas Hospital (affiliated with The New York Hospital - Cornell Medical Center), and finished with a fellowship in Geriatrics at UC Davis.

    Outside of work, Dr. Tomioka enjoys spending time with her husband and daughter. Her focus is on bringing new experiences to her daughter and they often travel and visit museums during their weekend excursions.

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    Primary Specialties
    Primary Specialties
    • Geriatric Medicine
      (Board Certified)
    • Internal Medicine
      (Board Certified)
    Other Specialties Associations
    Education & Training
    • Medical School
      Universidad Nacional Mayor de San Marcos - 1996
    • Residency
      National Hospital
    • Internship
      St. Barnabas Hospital
    • Residency
      St. Barnabas Hospital - 2002
    • Fellowship
      University of CA Davis Medical Center - 2003
  • Insurance Accepted

    Insurance Accepted

    Aetna: *7691697
    Blue Cross: *Z64420
    Blue Shield: 100036422017
    CIGNA: 8576503040
    CIGNA Select: 8576503041
    Health Net: 3620131416
    Health Net Senior: n/a
    SCAN: 996-135989
    United Healthcare: *0326600044

    *Provider ID is the same for both HMO and Medicare Advantage Plans

  • Primary Location

16300 sand canyon ave