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Bridget O'Brien, D.O., FACS, FSSO

General Summary

Dr. O'Brien is a fellowship-trained breast surgical oncologist. After completing her fellowship and prior to relocating to Texas, she expanded her clinical experience as a surgeon and assistant professor at a community-based academic hospital in Columbus, OH.

Dr. O'Brien treats male and female benign and malignant breast conditions including fibrocystic disease, fibroadenoma, nipple discharge,  gynecomastia, abscess, mastitis, diabetic mastopathy, breast cancers, Phyllodes tumor, and breast sarcoma. She performs minimally-invasive office procedures including ultrasound-guided biopsy and aspiration.

Dr. O’Brien actively teaches other surgeons through regional, national and international courses on these Hidden Scar™ and Oncoplastic techniques to close the defect left behind from the removal of breast cancer. This can significantly reduce the cosmetic defect and changes often experienced with breast conservation surgery. She also works side-by-side with microsurgery fellowship-trained plastic surgeons to offer breast reductions, lifts and implant-based and autologous flap-based reconstruction, including DIEP flaps, when associated with the treatment of breast cancer.


  • Fellowship in Breast Surgical Oncology
    University of Miami, Jackson Memorial Hospital, Miami, FL
  • Residency in General Surgery
    West Virginia University, Charleston Area Medical Center, Charleston, WV
  • Medical School
    West Virginia School of Osteopathic Medicine, Lewisburg, WV

Surgery Locations

  • Ascension Seton Medical Center Austin    
  • Cedar Park Regional Medical Center
  • Cedar Park Surgery Center
  • St. David’s Georgetown Hospital
  • St. David’s Medical Center
  • St. David's Round Rock Medical Center

Other Information

Dr. O'Brien was raised in West Virginia sparking her love and appreciation for the outdoors. She enjoys spending time with her family and friends, road cycling, traveling and cooking. She has a great interest in male breast cancer, triple negative and HER2Neu positive breast cancer, neoadjuvant chemotherapy, intraoperative radiation therapy, and patient education and advocacy. She has been a speaker for Bright Pink, a national non-profit working to educate other physicians on screening and treating patients at risk for breast and ovarian cancer. Dr. O’Brien is currently a course instructor for Stryker Hidden Scar™ and Oncoplastic Surgery Techniques.

Quote from Online Portal

“Have you ever wondered what to do once you have been diagnosed with Breast Cancer? So many things go through your mind and you want to make sure you have picked the right surgeon. I was diagnosed in February of 2018 and was sent to see Dr. O'Brien. I am so glad I was referred to her, because I have never felt so comfortable and knew once we met, she was going to take excellent care of me. This was a drastic change in my life, and I needed someone who was there. SHE WAS ALWAYS THERE.”


  • Disparities in Male Breast Cancer - The Florida Experience

    Clinical Breast Cancer, 2015

  • Current Treatment Guidelines for Postoperative Surgical Site Infection: Clinical Considerations in the Surgical Care Improvement Project Era

    The American Surgeon, 2015

  • Gallbladder Carcinoma in a Patient With Streptococcus bovis Bacteremia

    West Virginia Medical Journal, 2014

  • The Impact of the Implementation of the Bethesda System for Reporting Thyroid Cytopathology on the Surgical Treatment of Thyroid Nodules

    American Surgeon, 2012

Office & Outpatient

  • Abscess Drainage
  • Breast Sonography and Ultrasound
  • Cyst Aspiration
  • Lymphedema Screening and Prevention Program
  • Mediport Removal
  • Needle Biopsy of Breast Lesions - US Guided
  • Skin Biopsies

Surgical Procedures

  • Axillary Lymph Node Dissection
  • Excision of Chest Wall Tumors
  • Excisional Breast Biopsy
  • Hidden Scar Lumpectomy & Mastectomy
  • Hidden Scar Surgery
  • Lumpectomy - Partial Mastectomy - Quadrantectomy
  • Mastectomy
  • Mediport Placement
  • Nipple Duct Excision
  • Nipple Sparing Mastectomy
  • Oncoplastic Partial Mastectomy with Contralateral Mastopexy for Symmetry
  • Oncoplastic Tissue Rearrangement
  • Radical Excision of Metastatic Lesions
  • Reconstructive Surgery
  • Sentinel Lymph Node Biopsy
  • Wire Localization Excisional Biopsy

Breast Cancer Surgery Certificates

  • American Board of Surgery Board Certified in General Surgery
  • American Society of Breast Surgeons Ultrasound Certification
  • Hidden Scar Certificate of Training

Accolades & Memberships

  • American College of Surgeons
  • American Society of Breast Surgeons
  • Cedar Park Regional Medical Center Breast Center of Excellence Program, Chair
  • Fellow of American College of Surgeons
  • Seton Breast Clinic Breast Surgery, Staff Member
  • Society of Surgical Oncology
  • St. David’s Georgetown Hospital Breast Cancer Center, Medical Director
  • Williamson County Medical Association President