Dr. Mark Brennan, DO

Dr. Mark Brennan, DO

General Surgery  |  
Male  |  
Age 51
(17)
Insurances AcceptedSave
Dr. Mark Brennan, DO is a general surgery doctor who practices in Johnson City, NY. He is 51 years old and has been practicing for 23 years.

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

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you

Top Care Areas

new

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.

We're trying something new with Top Care Areas.Was it helpful for you?YesNo

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

More

Read More
26

Procedures

  • Aortic Repair, Open or Repair of Arterial Aneurysm, Open
  • Arteriovenous Fistula Repair
  • Arteriovenous Shunt Creation
  • Carotid Artery Stent Placement
  • Carotid Endarterectomy (CEA) or Excision of Infected Graft
  • Carotid Ultrasound
  • 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 Surgery
  • Laparotomy
  • Lung Surgery
  • Non-Coronary Angioplasty, Atherectomy, and Stenting
  • Peripheral Artery Bypass
  • Peripheral Artery Catheterization
  • Port Placements or Replacements
  • Removal of Arteriovenous Shunt for Renal Dialysis
  • Revision of Arteriovenous Shunt for Renal Dialysis
  • Thromboendarterectomy or Excision of Infected Graft
  • Varicose Vein Procedure
  • Vascular Duplex Ultrasonography and Plethysmography
  • Vascular Surgical Procedure
  • Vascular Transcatheter Embolization
  • Video-Assisted Thoracoscopic Surgery (VATS) or Thoracotomy

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)
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)
in Binghamton, NY |
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!
Binghamton, NY |
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!
in Whitney Point, NY |
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.
in Newark Valley, NY |
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.
in Endicott, NY |
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
in Johnson city,ny |
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
Have you seen Dr. Mark Brennan, DO?
Are you Dr. Brennan?
Make it easy for patients to share their feedback. Also manage your personalized profile!

Visit Dr. Brennan

Now Accepting New Patients
Dr. Brennan accepts 9 insurance carriers
  • Aetna
    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
  • MultiPlan
    MultiPlan PPO
  • MVP Health Care
    MVP Health Care PPO

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Brennan has admitting privileges

UHS - Binghamton General Hospital
10 Mitchell Ave
Binghamton, NY 13903
View Hospital Profile

View other doctors with similar experience to find the right doctor for you.

Breast Surgical Oncology
(38)
General Surgery
(9)
General Surgery
(2)
General Surgery
(1)
General Surgery
(9)
General Surgery
(12)
General Surgery
(8)
General Surgery
(2)