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Alison Unzeitig Barron, M.D., FACS

General Summary

Dr. Alison U. Barron is a breast surgeon specializing in breast surgical oncology and is certified by the American Board of Surgery. She is an adjunct assistant professor at Texas A&M University College of Medicine.

Dr. Barron sees all patients with any breast complaint. She is fellowship trained to treat all forms of breast cancer from initial diagnosis, to active management, and long-term post-treatment surveillance. Not only does she treat breast cancer patients but she also manages patients with common breast issues like breast pain, disorders of the nipple/areola, breast abscesses/mastitis, fibrocystic breast disease, abnormal mammograms and palpable abnormalities of the breast tissue. She also manages patients who are at high risk for breast cancer either due to a genetic mutation or based on their family history, dense breast tissue, multiple breast biopsies, among other things.


Dr. Barron attended medical school at the University of Texas Southwestern Medical Center in Dallas, Texas where she obtained her medical doctorate. She then went on to complete a general surgery internship and residency at the University of Texas Southwestern Medical Center and Parkland Hospital where she was also chief resident. Dr. Barron then completed a fellowship in Breast Surgical Oncology at the Mayo Clinic in Rochester, MN.

Accolades & Memberships

  • American College of Surgeons
  • American Medical Association 
  • American Society of Breast Surgeons
  • Bridge Builders Society Founders Award (2023)
  • George Peters Award for Best Presentation by a Breast Fellow (2018)
  • Outstanding Women in Medicine by the Scene in San Antonio Magazine (2024)
  • Society of Surgical Oncology
  • Super Doctors® Rising StarsSM (2021-2024)

Surgery Locations

  • Methodist Hospital Landmark
  • Methodist Hospital Metropolitan
  • Methodist Surgery Center Landmark
  • ​North Central Baptist Hospital


  • Local Production of Lactate, Ribose Phosphate, and Amino Acids Within Human Triple-Negative Breast Cancer

    Med (New York, N.Y), 2021

  • Association of Low Nodal Positivity Rate Among Patients With ERBB2-Positive or Triple-Negative Breast Cancer and Breast Pathologic Complete Response to Neoadjuvant Chemotherapy

    JAMA Surg, 2018

  • Predicting Non-sentinel Lymph Node Metastases in Patients with a Positive Sentinel Lymph Node After Neoadjuvant Chemotherapy

    Annals of Surgical Oncology, 2018

  • Do Acute-Care Surgeons Follow Best Practices for Breast Abscess Management? A Single-Institution Analysis of 325 Consecutive Cases

    Journal of Surgical Research, 2017

Office & Outpatient

  • Abscess Drainage
  • Breast Sonography and Ultrasound
  • Cyst Aspiration
  • Mediport Removal
  • Needle Biopsy of Breast Lesions - US Guided
  • Partial Breast Radiation Catheter Insertion (SAVI, Contura, Mammosite)
  • 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
  • Sentinel Lymph Node Biopsy
  • Wire Localization Excisional Biopsy

Community Service

Dr. Barron enjoys giving back to the community and has traveled to Guatemala for the Emmaus Medical Mission in Sumpango where she assisted in general surgical operations.

Other Information

Dr. Barron was born and raised in Laredo, TX and is fluent in Spanish. She comes from a large family of physicians and medical care workers in south Texas. She enjoys cooking, running, hiking, traveling, and bowling.