Dr. Christopher W. Brennig – Vascular Surgeon – Austin, TX

Meet Dr. Brennig

Board-certified vascular surgeon Dr. Christopher W. Brennig is the founder and director of The Austin Vein Institute. He is certified by the American Board of Vascular Surgery and the American Board of General Surgery. Dr. Brennig's practice in Austin, TX is dedicated exclusively to the evaluation, diagnosis, and treatment of vein conditions. He has developed a successful vascular and endovascular surgery practice treating some of the most severe and complex arterial and venous vascular conditions today. He performed St. David North Austin Medical center’s first thoracic aortic endograft repair for a patient with a dissecting thoracic aortic aneurysm. He also performed the hospital’s first endovascular clot lysis-recanalization, angioplasty, and stent treatment for a patient with complex deep vein thrombosis/May Thurner syndrome with great success. 

He is an award-winning surgeon and has been named a "Top Doctor" in Austin Monthly Magazine. Dr. Brennig has also presented multiple research papers, published articles, and continues to train other physicians and healthcare providers in emerging vein therapies. He is the founder of The Austin Vascular Institute and its affiliate, The Austin Vein Institute.

Skills & Specialties

Dr. Brennig’s breadth of experience and success in treating the most complex vascular conditions has allowed him to develop a uniquely qualified approach to help his patients with vein problems. He has many years of dedicated training and focused experience in treating some of the most complex arterial and venous peripheral vascular conditions. He is also an authority in the management of other vein conditions including blood clots, venous leg swelling and associated skin conditions (ulcers, hemorrhage, and dermatitis). Dr. Brennig provides rescue therapy for patients with recurrent varicose veins who have had other unsuccessful vein procedures. Each patient's treatment plan is adjusted to be very detailed and tailored to their specific condition.

Education & Training

Dr. Brennig graduated from the University of Texas in Austin, TX earning a Bachelor of Arts degree in biological sciences. He continued his education at the University of Texas Medical School in Houston where he obtained his medical degree. After his general surgery internship at the Baylor College of Medicine in Houston, TX he completed his general surgery residency and served as the chief surgery resident at Baylor University Medical Center in Dallas, TX.

During his five-year general surgery residency, Dr. Brennig developed a keen interest in the field of vascular diseases, vascular surgery, and the latest minimally invasive catheter-based therapies available to treat those damaged veins. This led him to Boston, MA and the Tufts University Medical Center for a two-year vascular surgery fellowship, where he trained with an emphasis on complex minimally invasive vascular therapies including treatment of complex venous disorders. After his seven years of specialty training, Dr. Brennig was recruited to Austin, TX by St. David’s Healthcare System to provide state-of-the-art vascular care for Central Texas patients suffering from critical life and limb-threatening vascular conditions.

Certifications & Memberships

Dr. Brennig is proud to be certified by or a member of the following medical organizations:


  • Texas State Board of Medical Examiners Certification
  • American Board of Surgery: Specialty Board Certification – General Surgery
  • American Board of Surgery: Specialty Board Certification – Vascular / Endovascular Surgery
  • ATLS / ACLS Certified


  • American College of Surgeons
  • American Medical Association
  • Society for Clinical Vascular Surgery
  • Society for Vascular Surgery
  • Southwestern Surgical Congress
  • Texas Medical Association
  • Travis County Medical Society


"True, it's hard to find such a professional office (everyone working there), but combine that with the calm, compassionate treatment and you have one in a million! I am on more third round of vein treatment, and this experience stands out by leaps and bounds. But most meaningful to me was when I went in with an injury that involved my veins and more. Dr. Brennig was very thorough and methodical in the treatment, which will result in a more complete healing! He is what a doctor should be...and his office is what an office should be!"



"Dr. Brennig and his staff are amazing. The care, attention to detail and kindness from this practice is unparalleled. Dr. Brennig is thorough and enjoys what he does. I highly recommend this practice."



"Dr. Brenning is awesome, and the work he does is life-changing! I've suffered from vericose veins for years and never took care of them because I thought that was being vain. Then the pain and discomfort got so bad that I sought out treatment. Dr. Brennig taught me why I was having the pain and swelling and put me on a treatment plan to relief me from all of it! After my first treatment, I felt better almost instantly. It was so worth it!! And the cosmetic benefits for me were just a side-benefit, but those are nice too. I recently bought shorts for the first time in years! I would recommend Dr. Brenning to anyone suffering from vericose veins... but more importantly, I'd recommend him to those folks that are not yet suffering and his treatments can help you avoid future pain."



"I inherited a severe case of varicose veins. Additionally, my veins were creating issues in my lower extremities that required attention. Could not have waited. Dr. Brennig and his staff determined my need and preceded to get things back to "ship shape" . Dr. Brennig is one of the coolest doctors I know. Very professional, very friendly chairside manner. And actually spends the time with you to put you at ease and to let you know exactly what you're looking at. He may even convince me to quit smoking. We're working on it. The vein institute, Dr Brennig and staff are tops !⚕️ Dr. Brennig is also the recipient of the Austin monthly doctor of the year award three years in a row. Congratulations doctor !"



"Dr. Brennig reminds me of my doctors while growing up. He gives you his time, undivided attention and a deep sense of actually caring about you. It’s a rare (but often missing!) trait."



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