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Dr. Mark J. Brennan, DO

General Surgery

  • (607) 763-8100

Dr. Brennan's Overview

Dr. Mark J. Brennan graduated from the Philadelphia College of Osteopathic Medicine in 1994. He works in Johnson City, NY and specializes in General Surgery and Vascular Surgery. Dr. Brennan is affiliated with Binghamton General Hospital and Wilson Medical Center.

Dr. Brennan's Experience

Years in Practice: 21

Dr. Brennan's Specialties

General Surgery, Vascular Surgery

Dr. Brennan's Education & Training

Medical School: Philadelphia College of Osteopathic Medicine; Graduated 1994

Dr. Brennan'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. Brennan's Accepted Insurance

  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • CIGNA Open Access Plus
  • Emblem HIP Select PPO
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Dr. Brennan's Office Information & Appointments

Office Locations

United Medical Associates
United Health Services

30 Harrison St Ste 455
Johnson City, NY 13790
(607) 763-8100


Office Hours and Information

Fax: (607) 763-8048

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 Closed
Sunday Closed

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Dr. Brennan's Hospital Affiliations

Office Locations

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