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
Mark Joseph Fredrick, MD

Mark Joseph Fredrick, MD

Please contact to confirm appointment availability

Optum Provider

Please contact to confirm appointment availability

Specialty

Internal Medicine

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.7

69 reviews

    • Reviewed on May 30, 2026
    • Verified Review

    Dr. Fredrick is very knowledgeable and fiendly, polite and courteous, making you feel at ease while discussing your health condition.

    • Reviewed on May 25, 2026
    • Verified Review

    He is the best doctor.

    • Reviewed on May 17, 2026
    • Verified Review

    He has been my physician for 25+ years and have always been pleased with his care.

    • Reviewed on Apr 24, 2026
    • Verified Review

    Best doctor i ever have

    • Reviewed on Apr 22, 2026
    • Verified Review

    I already provided this response in the previous comments box.

    • Reviewed on Apr 22, 2026
    • Verified Review

    Because

    • Reviewed on Apr 22, 2026
    • Verified Review

    Appears to be relatively competent. He has taken way too long to provide a referral for an MRI and an ENT

    • Reviewed on Apr 21, 2026
    • Verified Review

    Very good doctor

    • Reviewed on Apr 17, 2026
    • Verified Review

    Listens to your concerns

    • Reviewed on Apr 16, 2026
    • Verified Review

    Caring, listens, responds to concerns and offers effective treatment. I feel very comfortable with him, and I don't feel rushed.

    • Reviewed on Apr 7, 2026
    • Verified Review

    Friendly and couteous

    • Reviewed on Mar 15, 2026
    • Verified Review

    Dr. Fredrick is a class act and fantastic MD.

    • Reviewed on Mar 12, 2026
    • Verified Review

    He is very personable and listens to our needs. Shares the possibilities of treatment and therapy. Makes followup calls to check up on how we are doing.

    • Reviewed on Mar 5, 2026
    • Verified Review

    He is knowledgeable, friendly, and caring!

    • Reviewed on Mar 2, 2026
    • Verified Review

    The rating I gave was for the way Optum takes our telephone calls. Dr. Fredrick has always been very good asks questions and always sees that you understants them .I .wou;d always recommend him.

    • Reviewed on Feb 26, 2026
    • Verified Review

    He is a very good docker

    • Reviewed on Feb 26, 2026
    • Verified Review

    Thorough

    • Reviewed on Feb 14, 2026
    • Verified Review

    Dr. Fredrick is not only an exceptional physician but also a truly compassionate human being. His knowledge and professionalism are outstanding, but what sets him apart is the warmth and kindness he shows to his patients. I always leave his office feeling reassured and supported. I am deeply grateful to have him as my doctor-he is, without question, the best healthcare provider I have ever had.

    • Reviewed on Feb 14, 2026
    • Verified Review

    He is the best! Answers all my questions and really is a great listener!!

    • Reviewed on Feb 12, 2026
    • Verified Review

    He listens to my problems and has always been able to get me the help I need

Page 1 of 4
  • About Mark Joseph Fredrick, MD

    Mark Fredrick, MD, is board certified in internal medicine. Dr. Fredrick earned his medical degree from Indiana University School of Medicine. He completed his internship and residency at Los Angeles County-USC Medical Center. In his spare time, Dr. Fredrick enjoys bicycling, photography and traveling. In addition to English, he speaks medical Span ish.

    Gender

    Male

    Board certifications

    American Board of Internal Medicine

    Licenses

    CA, G67380

    Employed or contracted

    Employed

    Network Name

    OptumCare HealthCarePartners California

    NPI

    1518964998

    Hospital affiliations

    Orange Coast Medical Center

  • Medical School

    • LAC & USC Medical Center

      1989

    Internship

    • Los Angeles General Medical Center

      1988