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Bridget O'Brien, D.O., FACS

General Summary

Dr. O'Brien is a fellowship-trained breast surgical oncologist with over 10 years of post-fellowship experience. 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. She continued to educate surgical residents and students through the Seton Breast Clinic/Dell Medical School through 2022.

Dr. O'Brien treats female and male 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 as well as the full range of operative breast surgical oncology procedures.

Dr. O’Brien has taught 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 Oncoplastic closure after a partial mastectomy/lumpectomy (breast reductions/lift) 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

Accolades & Memberships

  • American College of Surgeons
  • American Society of Breast Surgeons
  • Seton Breast Clinic Breast Surgery, Staff Member
  • Society of Surgical Oncology, Fellow
  • St. David’s Georgetown Hospital Breast Cancer Center, Previous Medical Director
  • Williamson County Medical Association, Past President

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

Surgery Locations

  • Cedar Park Regional Medical Center
  • Oakwood Surgery Center Round Rock
  • St. David’s Georgetown Hospital
  • St. David’s Medical Center
  • St. David’s Surgical Hospital


  • 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

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Other Information

Dr. O’Brien was raised in West Virginia sparking her love and appreciation for the outdoors. She enjoys spending time with her husband, two stepchildren and furry family members. She loves to travel, attend youth sports activities, lift weights, hike, cook and dares to ride the tallest, fastest rollercoasters just to cherish the excitement with the kids. She has a great passion for education and is currently a national speaker and educator for Stryker Hidden Scar Surgery™ teaching other surgeons these innovative techniques. She has previously been a national speaker for Bright Pink educating young physicians about the importance of identifying patients with risk factors for breast cancer for genetic testing and/or high-risk breast cancer screening purposes. She has a great interest in breast cancer risk reduction, triple negative and HER2Neu positive breast cancer, neoadjuvant chemotherapy when required, intraoperative radiation therapy, male breast cancer, and patient education and advocacy.