Skip to main content
Mark O'Brien, DO, Internal Medicine, Vista, CA

MarkO'BrienDO

Internal Medicine Vista, CA

Hospital Medicine/Hospitalist

Physician

Are you Dr. O'Brien?

Join over one million U.S. Physicians, Nurse Practitioners and PAs, already on Doximity.

  • Gain access to free telehealth tools, such as our "call shielding" and one-way patient texting.
  • Connect with colleagues in the same hospital or clinic.
  • Read the latest clinical news, personalized to your specialty.

Claim this profile

Not you? Find your profile

  • Office

    161 Thunder Dr Ste 210
    Suite 405
    Vista, CA 92083
    Phone+1 760-216-6500
    Fax+1 760-295-4753

Summary

  • Dr. Mark O'Brien, DO is a board certified internist in Vista, California. He is currently licensed to practice medicine in California.

Education & Training

  • Michigan State University College of Osteopathic Medicine
    Michigan State University College of Osteopathic MedicineClass of 1987

Certifications & Licensure

  • CA State Medical License
    CA State License 1990 - 2025
  • Internal Medicine
    American Board of Internal Medicine Internal Medicine