Dr. Mark Brennan, DO

Dr. Mark Brennan, DO

General Surgery  |  
Male  |  
Age 51
(17)
Insurances AcceptedSave
Dr. Mark Brennan, DO is a general surgery specialist in Johnson City, NY and has been practicing for 24 years. He graduated from Philadelphia Coll Of Osteo Med in 1994 and specializes in general surgery and vascular surgery.

30 Harrison St Ste 455

Johnson City, NY 13790

Contact Information

(607) 763-8100

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Capital District Physician's Health Plan (CDPHP)
  • Cigna
  • Empire Blue Cross Blue Shield
  • Excellus BlueCross BlueShield
  • Humana
  • MultiPlan
  • MVP Health Care

*Please verify this information when scheduling an appointment.

Learn about Dr. Brennan

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Top Care Areas

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See how frequently Dr. Brennan performs your care needs compared to other doctors.

Acute Deep Vein Thrombosis (DVT)
very high
more than 99% of peers
Deep Vein Thrombosis (DVT)
very high
more than 99% of peers
Thrombosis
very high
more than 99% of peers

Dr. Brennan's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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2

Specialties

  • General Surgery
  • Vascular Surgery
2

Board Certifications

  • General Surgery
    Accredited by: American Osteopathic Board of Surgery*
  • General Vascular Surgery
    Accredited by: American Osteopathic Board of Surgery*
39

Conditions Treated

  • Abdominal Aortic Aneurysm (AAA)
  • Acute Deep Vein Thrombosis (DVT)
  • Acute Venous Embolism Thrombosis
  • Aneurysm
  • Aortic Aneurysm
  • Aortic Dissection
  • Aortic Ectasia
  • Aortic Embolism and Thrombosis
  • Atherosclerosis
  • Atherosclerosis of Aorta
  • Brachial Plexus Palsy
  • Carotid Artery Disease
  • Chronic Deep Vein Thrombosis (DVT)
  • Chronic Venous Embolism Thrombosis
  • Congenital Heart Defects
  • Deep Vein Thrombosis (DVT)
  • Heart Disease
  • Hypertensive Encephalopathy
  • Median Arcuate Ligament Syndrome (MALS)
  • Peripheral Arterial Aneurysm
  • Peripheral Arterial Aneurysm and Dissection
  • Peripheral Arterial Disease of Extremities
  • Peripheral Arterial Dissection
  • Peripheral Arterial Embolism and Thrombosis
  • Peripheral Autonomic Neuropathy
  • Peripheral Nerve Disorders
  • Peripheral Vascular Disease (PAD, PVD)
  • Phlebitis and Thrombophlebitis
  • Renal Artery Arteriosclerotic Disease
  • Ruptured Aortic Aneurysm
  • Secondary Hypertension
  • Thoracoabdominal Aortic Aneurysm
  • Thrombosis
  • Transient Ischemic Attack (TIA)
  • Varicose Veins
  • Vascular Disease
  • Venous Compression
  • Venous Embolism and Thrombosis
  • Venous Insufficiency

Less

Read Less
26

Procedures

Background Check

0 Malpractice Claims

No malpractice history found for New York.

1 Sanction
  • Substandard Care, Incompetence or Negligence (12/11/2013)
    Action Taken: Probation
    Summary: Please reference the following Document
    Documentation: Download here (PDF)
    State: New York
1 Board Action
  • Modification Order (10/1/2015)
    Action Taken: Probation Terminated (Ended)
    Summary: Please reference the following Document
    Documentation: Download here (PDF)
    State: New York

Education

  • Philadelphia Coll Of Osteo Med
    Medical School | Graduated 1994

Awards & Recognition

Awards & Honors

Dr. Brennan has no awards or honors listed.

Media & Publications

Dr. Brennan has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Brennan does not have any memberships or affiliations listed. If you are Dr. Brennan and would like to add memberships or affiliations, please update your profile.

Dr. Brennan's Reviews

Likelihood of recommending Dr. Brennan to family and friends
3.7
based on 17 total reviews (6 with comments)

Likelihood to Recommend (17)

  • 5
    (11)
  • 4
    (0)
  • 3
    (0)
  • 2
    (1)
  • 1
    (5)

Dr. Brennan's Performance

Trustworthiness
VERY GOOD
Explains condition(s) well
VERY GOOD
Answers Questions
VERY GOOD
Time well spent
VERY GOOD

Office & Staff Performance

Scheduling
VERY GOOD
Office environment
VERY GOOD
Staff friendliness
VERY GOOD
Average wait time
10 to 15 minutes

Patient Comments (6)

I, myself, looked through Dr. Brennan's reviews to see if others recommended him as well before my surgery so I decided to write my own review. Dr. Brennan performed a scheduled cholecystectomy (gall bladder removal) for me and it could not have gone any better! I was so nervous/scared/anxious as...more
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Horrible. Don't go to him!! Did a junk by-pass with artificial vein which caused massive infection. Then gave up on the leg. Didn't care. Leg saved by another surgeon, not UHS based!
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Over the Christmas holidays my husband became ill with what we thought were heart issues.Fortunetly this wasn't the case. It was gallbladder problems. Dr. Brennan didn't hesitate and insisted the surgery be done on Christmas Day. His bedside manner was personable and his surgical skill enabled my...more
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Dr. Brennan is compassionate, courteous and able to answer all my questions and concerns. I am glad he was the surgeon chosen by my team of doctors. Thank you, Dr. Brennan and The Lord Bless you. I am unable to answer three of four questions in the first part below as I was treated by Dr....more
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Doctor Brennan is a wonderful and caring doctor. He saved my dad's life on October 10, 2015. My dad was rushed to surgery for an emergency abdominal aortic aneurysm. His aneurysm was beyond the point of a minor repair and we were told the risk of him NOT surviving was great. While in surgery the...more
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