Natalie Alphonse Sullivan, MD

Meet Natalie Alphonse Sullivan, MD

Bridging Academic Precision and Compassionate Cancer Care in Central Louisiana

Dr. Natalie Sullivan is a radiation oncologist at the CHRISTUS St. Frances Cabrini Cancer Center - South in Alexandria, Louisiana. She has brought over 13 years of clinical expertise to the region. By providing high-precision treatments like stereotactic radiosurgery locally, she ensures that families in Central Louisiana can access top-tier oncological care without the burden of long-distance travel to major metropolitan centers.

Career at a Glance

• Over 13 years of specialized experience in high-precision radiation oncology.
• Recipient of multiple Research Excellence Awards from Wake Forest University School of Medicine (2019–2021).
• Board-certified Diplomate of the American Board of Radiology.
• Served as a dedicated Physics Mentor for physician residents in Radiation Oncology Physics.

Clinical Role and Leadership

As a clinical leader at the Cabrini Cancer Center, Dr. Sullivan integrates advanced multi-modal imaging and meticulous treatment planning to manage complex malignancies. She collaborates within a multidisciplinary ecosystem of medical oncologists and surgeons to ensure radiation is both curative and protective of a patient’s long-term quality of life. She provides specialized care for conditions such as:

• Lung Cancer (Small Cell and Non-Small Cell)
• Prostate and Bladder Malignancies
• Breast Cancer (Adjuvant and Invasive Carcinoma)
• Anal and Rectal Cancers
• Brain Metastases and Primary CNS Tumors
• Gastrointestinal Malignancies

What You Can Expect from Care with Dr. Sullivan

Dr. Sullivan adheres to a philosophy of "healing the whole person," emphasizing that modern oncology requires transparency, kindness, and active listening. She believes that every patient is an individual whose experiences and autonomy must be honored throughout the treatment journey. You can expect:

• Meticulous coordination with your medical team for unified, "whole-person" care.
• The application of "heart-sparing" and brain-protective techniques to preserve long-term health.
• Clear, evidence-based communication regarding treatment goals and safety protocols.
• A compassionate support system dedicated to dignity and empathy in every interaction.

Advanced Surgical Innovation / Diagnostic Care

The practice utilizes cutting-edge radiation modalities, including Intensity-Modulated Radiation Therapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT). Dr. Sullivan specializes in Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT), employing sophisticated linear accelerators and Image-Guided Radiation Therapy (IGRT) to target tumors with millimeter precision. For breast cancer patients, she integrates advanced "heart-sparing" techniques like Deep Inspiration Breath Hold (DIBH) to minimize radiation exposure to healthy tissues.

Research, Clinical Insight, and Thought Leadership

Dr. Sullivan is a published researcher focused on enhancing the safety and efficacy of radiation therapy. Her co-authored phase I clinical trials on pioglitazone investigated new frontiers in protecting brain tumor survivors from radiation-induced cognitive decline. Additionally, her work on the safety of repeat stereotactic radiosurgery for recurrent lesions provides critical dosimetric data used to minimize the risk of radiation necrosis in patients nationwide.

Commitment to Public Health and Health Equity

Deeply committed to health equity, Dr. Sullivan has conducted extensive peer-reviewed research into how sociodemographic factors—such as income and rural residence—impact outcomes for cancer patients. This insight informs her daily practice in Alexandria, where she advocates for early intervention and community outreach to overcome the structural barriers that often delay lifesaving cancer care for underserved populations.

Education and Certifications

Medical School: Wake Forest School of Medicine, Winston-Salem, NC

Residency: Wake Forest Baptist Medical Center, Winston-Salem, NC

Fellowship: Advanced Radiotherapeutic Techniques, Wake Forest School of Medicine, Winston-Salem, NC

Board Certification: American Board of Radiology (Radiation Oncology)