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Dr. Mark G. Byrne, MD

Internal Medicine

  • (831) 768-0220

Dr. Byrne's Overview

Dr. Mark G. 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: 26

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

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Overall Rating


  • Explains conditions & treatments
  • Takes time to answer my questions
  • Provides follow-up as needed
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Dr. Byrne's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • Blue Cross CA Advantage PPO Preferred DirectAccess Plus
  • Blue Cross CA Pathway X PPO Direct Access
  • Blue Cross CA Pathway X Tiered Direct Access
  • Blue Cross CA PPO
  • Blue Cross CA Select PPO
  • Blue Shield CA Basic EPO
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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: Not Available

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

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Dr. Byrne's Hospital Affiliations

Office Locations

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