Accepting new patients

Dr. Mark Brennan, DO

General Surgery ·  Male · Age 53

Dr. Brennan

United Health Services

30 Harrison St Ste 455 Johnson City, NY 13790

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Dr. Mark Brennan, DO is a general surgery specialist in Johnson City, NY and has been practicing for 25 years. He graduated from Philadelphia College Of Osteopathic Medicine in 1994 and specializes in general surgery and vascular surgery.


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Dr. Brennan accepts

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(607) 763-8100

Dr. Brennan accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Blue Cross Blue Shield
Blue Card PPO
Capital District Physician's Health Plan (CDPHP)
Capital District Physician's Health Plan (CDPHP) HMO
Cigna
Cigna PPO
Open Access Plus
Empire Blue Cross Blue Shield
Empire Blue Cross Blue Shield HMO
Excellus BlueCross BlueShield
Excellus BlueCross BlueShield PPO
Humana
Choice Care PPO
MVP Health Care
MVP Health Care PPO

Background Check

1 board action Found
  • Modification Order (10/1/2015)View details
No malpractice claims found for New York
No disciplinary actions found for the years we collect data
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Experience Check

Check Dr. Brennan's experience treating your condition or procedure

Dr. Brennan's Top Procedures and Conditions

Treatment Frequency
Non-Coronary Angioplasty, Atherectomy, and Stenting
very high
very high

Treatment Frequency

Dr. Brennan performs Non-Coronary Angioplasty, Atherectomy, and Stenting more than 100% of his peers

Dr. Brennan performs this procedure more than 100% of his peers

Rating Includes other areas of care:

  • Airway Stenting
  • Carotid Artery Stent Placement
  • Enteral Stenting
  • Esophageal Stenting
  • Intracranial Angioplasty With Stent Placement
  • Intracranial Vessel Angioplasty
  • Peripheral Angioplasty
  • Renal Artery Angioplasty
  • Stenting, Intracranial Vessels
  • Wingspan™ Stent System
Acute Deep Vein Thrombosis (DVT)
very high
very high

Treatment Frequency

Dr. Brennan treats Acute Deep Vein Thrombosis (DVT) more than 99% of his peers

Dr. Brennan treats this condition more than 99% of his peers

Deep Vein Thrombosis (DVT)
very high
very high

Treatment Frequency

Dr. Brennan treats Deep Vein Thrombosis (DVT) more than 99% of his peers

Dr. Brennan treats this condition more than 99% of his peers

Dr. Brennan's conditions and procedures:

  • Abdominal Aortic Aneurysm (AAA)
  • Acute Deep Vein Thrombosis (DVT)
  • Acute Venous Embolism Thrombosis
  • Aneurysm
  • Aortic Aneurysm
  • Aortic Dissection
  • Aortic Ectasia
  • Aortic Embolism and Thrombosis
  • Aortic Repair, Open or Repair of Arterial Aneurysm, Open
  • Arteriovenous Fistula Repair
  • Arteriovenous Shunt Creation
  • Atherosclerosis
  • Atherosclerosis of Aorta
  • Brachial Plexus Palsy
  • Carotid Artery Disease
  • Carotid Artery Stent Placement
  • Carotid Endarterectomy (CEA) or Excision of Infected Graft
  • Chronic Deep Vein Thrombosis (DVT)
  • Chronic Venous Embolism Thrombosis
  • Congenital Heart Defects
  • Deep Vein Thrombosis (DVT)
  • Dialysis Access Procedures
  • Dressing and-or Debridement of Wound, Infection, or Burn (incl. Negative Pressure Wound Therapy)
  • Embolectomy, Thrombectomy, or Vessel Exploration
  • Endovascular Repair of Abdominal Aortic Aneurysm
  • Endovascular Repair of Aorta
  • Heart Disease
  • Heart Surgery
  • Hypertensive Encephalopathy
  • Laparotomy
  • Lung Surgery
  • Median Arcuate Ligament Syndrome (MALS)
  • Non-Coronary Angioplasty, Atherectomy, and Stenting
  • Peripheral Arterial Aneurysm
  • Peripheral Arterial Aneurysm and Dissection
  • Peripheral Arterial Disease of Extremities
  • Peripheral Arterial Dissection
  • Peripheral Arterial Embolism and Thrombosis
  • Peripheral Artery Bypass
  • Peripheral Artery Catheterization
  • Peripheral Autonomic Neuropathy
  • Peripheral Nerve Disorders
  • Peripheral Vascular Disease (PAD, PVD)
  • Phlebitis and Thrombophlebitis
  • Port Placements or Replacements
  • Removal of Arteriovenous Shunt for Renal Dialysis
  • Renal Artery Arteriosclerotic Disease
  • Revision of Arteriovenous Shunt for Renal Dialysis
  • Ruptured Aortic Aneurysm
  • Secondary Hypertension
  • Thoracoabdominal Aortic Aneurysm
  • Thromboendarterectomy or Excision of Infected Graft
  • Thrombosis
  • Transient Ischemic Attack (TIA)
  • Varicose Vein Procedure
  • Varicose Veins
  • Vascular Disease
  • Vascular Duplex Ultrasonography and Plethysmography
  • Vascular Surgical Procedure
  • Vascular Transcatheter Embolization
  • Venous Compression
  • Venous Embolism and Thrombosis
  • Venous Insufficiency
  • Video-Assisted Thoracoscopic Surgery (VATS) or Thoracotomy

About Me

Biography

Dr. Mark Brennan, DO is a general surgery specialist in Johnson City, NY and has been practicing for 25 years. He graduated from Philadelphia College Of Osteopathic Medicine in 1994 and specializes in general surgery and vascular surgery.

Specialties

  • General Surgery
  • Vascular Surgery

Board Certifications

  • General Surgery
  • General Vascular Surgery

Education

1994
Philadelphia College Of Osteopathic Medicine
Medical School
1994

Dr. Brennan's Reviews

Likelihood to recommend Dr. Brennan

3.6

Based on 17 reviews

5 Stars
64.70588235294117%
(11)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
5.882352941176471%
(1)
1 Star
29.41176470588235%
(5)

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Average Wait Time
  • 10 – 15 minutes
Dr. Brennan's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. Mark Brennan, DO
RecentHighestLowestMost Helpful
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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 this was my first surgery ever and I am only 19.. but he reassured me he would do his absolute best and I was in safe hands. He did an amazing job with a very quick recovery! He did not let me down!
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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 husband to be back home in a matter of two days. I would highly recommend this fine man and I sincerely thank him for his care of my husband.
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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. Brennan while in hospital. I dealt with his staff on the phone after my chemo treatments were done.
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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 aneurysm ruptured but Dr. Brennan was able to save his life. I cannot praise Dr. Brennan enough for all he did for us, his knowledge, wonderful bedside manner and overall treatment he gave to my dad. He
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He acted like I wasn't really in pain.treated me as if i didndidn't know what I was talking about.after surgery he was an ass.yeah he gave me something for pain.but a few days later when he said i could double up on what he gave me for pain..then two days or so after surgery I was on my own.he doesnt want to help.so I'm left having to get out of pain on my own.so thanks a lot Dr Brennan hope you enjoy getting drunk in your off time.I'll be waiting to call the cops and happily be sure u get a dwi
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