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About St. Joseph Health

SJH provides a full range of care facilities including 16 acute care hospitals, home health agencies, hospice care, outpatient services, skilled nursing facilities, community clinics and physician groups. All of our hospital and home health entities are accredited by the Joint Commission. In our award-winning facilities, SJH maintains a "continuum of care," matched to the diverse needs of the urban centers, smaller cities and rural communities who depend on us every day.

Katherine Manasson, MD

  • Internal Medicine
Additional Language Spoken
Russian, English
Medical Groups & Affiliations
  • Mission Hospital Affiliated Physicians
Katherine Manasson, MD
26732 Crown Valley Parkway
Suite 507
Mission Viejo, CA 92691
Accepting New Patients

Primary Office

Katherine Manasson, MD
26732 Crown Valley Parkway
Suite 507
Mission Viejo, CA 92691
Get Directions
(949) 348-1085
(949) 348-1087
Mon 9 a.m. - 5 p.m., Tue 8 a.m. - 5 p.m., Wed 8 a.m. - 5 p.m., Thu 8 a.m. - 5 p.m., Fri 9 a.m. - 2 p.m., Sat

More Information



  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Internal Medicine
    Areas of Interest

    Internal Medicine

  • Biography



    My professional approach includes preventive care, patient education, and individual treatment planning based on the latest achievements in medicine. I encourage patients to actively participate in their own treatment selection process.

    It is important to take the time to discuss problems with a patient, so we can work together toward a mutually agreeable decision.

    Family tradition.

    listening to classical music, reading biography and popular science books, and playing tennis.

    American Board of Internal Medicine
    Areas of Expertise
    Diabetes, hypertension, women's health.
  • Insurance Accepted

    Insurance Accepted

    Insurance ID Numbers

    Aetna: *276778
    Blue Cross: *0XL079
    Blue Shield: *00A615940
    CIGNA: 8153082010
    CIGNA Select: 8153082014
    Health Net: 3207074981
    Health Net Senior: 5270074981
    SCAN: 955-23132
    United Healthcare: *0183520058

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

  • 24-Mar-2019
    This was my 94 y.o. mother's first visit. *Dr. Manasson was very thorough and referred us to get an x-ray for an injury she had to her wrist after a fall. Also had referral for home health. Referral for orthopedist as well. She was patient with my mother and addressed all my concerns. We received new medication orders. Labs had already been done at Scripps a month earlier in preparation for my mothers move to assisted living. Many of questions above did not really apply since it was our first visit. The office followed up with me about referrals and some issues my mother developed since that appointment.
    *Dr. Manasson is very "matter-of-fact" - there is a degree of a communication barrier just due to her personality.
    After arriving 20 min. prior to my appointment I had to wait an additional 1 hour & 45 minutes to see the doctor. When trying to tell her some of my issues, she informed me that this is a annual check up & if she had listen to my problems & diagnosis if she would have to charge me extra. She also did not like the fact I do not take any drugs.
    The doctor is non approachable - difficult to understand and seemed rude and had NO BEDSIDE MANNER.
    She's a matter of fact doctor, very insensitive with what she says good or bad.
    5 Total Comments
  • More Info

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