Skip to content

    Physician Directory

    Find a Doctor

    Mark G. Byrne, MD

    Internal Medicine, Cardiovascular Disease

    • (831) 768-0220

    Dr. Byrne's Overview

    Dr. Byrne graduated from the University of Illinois, Chicago College of Medicine in 1989. He works in Watsonville, CA and specializes in Internal Medicine and Cardiovascular Disease. Dr. Byrne is affiliated with Watsonville Community Hospital.

    Dr. Byrne's Experience

    Years in Practice: 28

    Dr. Byrne's Specialties

    Internal Medicine, Cardiovascular Disease

    Dr. Byrne's Education & Training

    Medical School: University of Illinois, Chicago College of Medicine; Graduated 1989

    Dr. Byrne's Rating

    Rate This Doctor

    Overall Rating


    • Explains conditions & treatments
    • Takes time to answer my questions
    • Provides follow-up as needed
    • View All Ratings

    Dr. Byrne's Accepted Insurance

    Please verify insurance information directly with your doctor's office as it may change frequently.

    • Aetna Choice POS II
    • Aetna Managed Choice POS
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
    • Anthem BC Pathway X PPO Tiered
    • BCBS Blue Card PPO
    • Blue Cross CA PPO Prudent Buyer Small Group
    • Blue Cross CA Advantage PPO Preferred DirectAccess Plus
    • Blue Cross CA Pathway X PPO
    • Blue Cross CA PPO Prudent Buyer Individual
    • View More

    Dr. Byrne's Office Information & Appointments

    Office Locations

    Brennen Medical Group
    Brennan Medical Clinic

    30 Brennan St
    Watsonville, CA 95076
    (831) 768-0220


    Office Hours and Information

    Fax: (831) 722-1702

    Practice Website:

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: Yes

    Monday 8:00 AM - 5:00 PM
    Tuesday 8:00 AM - 5:00 PM
    Wednesday 8:00 AM - 5:00 PM
    Thursday 8:00 AM - 5:00 PM
    Friday 8:00 AM - 5:00 PM
    Saturday 8:00 AM - 12:00 PM
    Sunday Closed

    Other Physicians in Dr. Byrne's Practice

    Dr. Byrne's Hospital Affiliations

    Office Locations

    Other Internists Near Watsonville, CA

    View More Internists