Dr. O'Brien is a fellowship-trained breast surgical oncologist. After completing her fellowship, 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. To achieve the best operative oncologic and cosmetic outcome, she uses Oncoplastic and Hidden Scar techniques for lumpectomy and nipple-sparing mastectomy.

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

Surgery Location

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

Personal 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 is a national speaker for Bright Pink and an instructor for Hidden Scar™ Surgery.

Accolades & Memberships

  • Williamson County Medical Association President
  • American Society of Breast Surgeons
  • Society of Surgical Oncology
  • American College of Surgeons
  • Director of Cedar Park Regional Medical Center Breast Center of Excellence Program
  • Seton Breast Clinic Breast Surgery, Staff Member

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


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