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Our Physician Extenders

These capable Physician Extenders assist in managing acute and chronic brain and spine conditions through comprehensive history taking, physical exams and the ordering of diagnostic tests and treatments. Our nurse practitioners are qualified to diagnose medical problems, assist in surgical procedures, order therapies, prescribe medications, and make referrals. Along with the rest of our Neurosurgical team, the core philosophy of our nurse practitioner role is individualized care that focuses on both the patient’s medical issues, as well as the effects of illness and injury on the life of the patient and his or her family.

A Physician Extender’s areas of expertise include the following:

  • Assisting our Neurosurgeons in surgery
  • Collaborating with the Neurosurgeons and other health providers about patient care
  • Counseling and educating patients on health behaviors, self-care skills and treatment options
  • Diagnosing and treating acute illnesses, infections and injuries
  • Diagnosing, treating, and monitoring chronic conditions
  • Obtaining medical histories and conducting physical examinations
  • Ordering, performing and interpreting diagnostic studies (e.g., lab tests, x-rays, MRIs, CT scans)
  • Prescribing medications
  • Prescribing physical therapy and other rehabilitation treatments

Our Physician Extenders

Stacey Castellanos, NP
Stacey Castellanos, NP
  • Masters of Science, Nurse Practitioner, Texas Woman’s University


Lisa Montgomery, AGNP
Lisa Montgomery, AGNP
  • Masters of Science in Nursing, Adult-Geriatric Nurse Practitioner Program, Texas Women’s University, Dallas, Texas
  • Bachelor of Science in Nursing, University of Texas at Arlington
  • Bachelor of Science in Molecular Biology, University of Texas at Dallas
  • Registered Nurse in the state of Texas
  • ACLS and BLS Certifications
  • CCRN
  • Sigma Theta Tau


Kylie Rutherford, PA-C
Kylie Rutherford, PA-C
  • Masters of Physician Assistant Studies, Louisiana State University Health Sciences Center, Shreveport, Louisiana, Valedictorian
  • Bachelor of Science Biology, Hardin-Simmons University, Holland Scholar, President’s List
  • BLS Certifications
  • American Academy of Physician Assistants


Breanne Smith, FNP-C
Breanne Smith, FNP-C
  • Masters of Science in Nursing, Family Nurse Practitioner program, Texas Women’s University, Dallas, TX
  • Bachelor of science in Nursing, Texas Christian University, Fort Worth, TX
  • Registered nurse in the state of Texas and New York
  • ACLS and BLS certifications
  • First Assist Certification
  • Sigma Theta Tau, Nursing Honor’s Society
  • North Texas Nurse Practitioner Member
  • American Association of Nurse Practitioner’s member


Linda Rodriguez-Gilmore
Linda Rodriguez-Gilmore
  • Masters of Science in Nursing, Chamberlain University
  • Family Nurse Practitioner certified
  • Certified EMT
  • Bilingual in English and Spanish