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Pioneers in Patient-Centered Care

The Nurse Practitioner Group is proud to serve under a dedicated medical leadership that upholds the standards of high-quality healthcare.


They carry years of experience in the field and lead by example with strong personal and professional values. Our medical leadership carries a strong understanding of the increasingly complex field of 21st-century medicine, wielding a range of non-technical skills that allow them to lead across professional boundaries.


Get to know who they are below.

Lorraine Frazier,
Senior Vice President, Columbia University Irving Medical Center
Dean, Columbia University School of Nursing
Senior Vice President, Columbia University Irving Medical Center
Mary O’Neil Mundinger Professor of Nursing

Dean Lorraine Frazier joined Columbia Nursing from The University of Texas Health Science Center at Houston (UTHealth), where she was a professor and dean of the Cizik School of Nursing. Frazier is a national expert in biobanking. Her research into the interactions of behavior and genetics in patients with acute coronary syndrome has been funded by the National Institutes of Health.

Stephen Ferrara,
Associate Dean, Clinical Affairs
Associate Professor

Stephen Ferrara oversees the Nurse Practitioner Group primary care facilities as well as Columbia University School of Nursing’s attending clinical faculty. He has more than 19 years of clinical experience working in higher education, correctional, retail, men’s, and occupational health settings. Ferrara earned MS and DNP degrees from Pace University and completed a post-graduate fellowship in Health Information Technology for clinician leaders at The George Washington University.

diana hernandez practice manager
Diana Hernandez
Senior Practice Manager

Diana Hernandez oversees all aspects of the Nurse Practitioner Group’s administrative operations, including staffing, scheduling, care coordination, and interdepartmental communication.  Working in close collaboration with the nurse practitioners, she strives to create an environment where all patients receive the highest quality clinical care in an efficient and friendly manner.  Prior to working at the Nurse Practitioner Group, she managed a multi-specialty practice for the Columbia Faculty Practice Organization.

“My nurse practitioner also teaches, is more educated and more knowledgeable about the latest treatments, and isn’t set in an old way of thinking.”
– Patient