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.

Background & Education

  • 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

Surgical 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


The Impact of the Implementation of the Bethesda System for Reporting Thyroid Cytopathology on the Surgical Treatment of Thyroid Nodules
American Surgeon, 2012

Gallbladder Carcinoma in a Patient With Streptococcus bovis Bacteremia
West Virginia Medical Journal, 2014

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