PAGNY Leadership

James Haller,

Interim CEO

James comes to PAGNY after ten years at HealthCare Partners (“HCP”), a large managed care organization based in Long Island, NY where he held the position of Chief Finance and Analytics Officer. During his tenure at HealthCare Partners, which included the positions of Controller and Vice President of Finance, he oversaw all financial and analytic functions of HCP and was instrumental in driving optimal results to build financial strength throughout the company.   

Prior to HealthCare Partners, James worked for twelve years in the travel industry during a high growth period for both Global Aviation Holdings and Royal Caribbean Cruises with increasing responsibilities in finance and business analytics. James holds a Bachelor of Science Degree in Accounting from State University of New York in Buffalo and is pursuing Certified Public Accountant licensure.

Michelle Ronquillo,

Chief Human Resources Officer

Michelle Ronquillo is a high impact HR Leader with a background in Healthcare, Retail, and Hospitality. She has extensive labor and employee relations experience with a focus on employee engagement.  Michelle most recently served as the Chief HR Officer at National HealthCare Associates where she had responsibility for 6000+ professionals in post-acute settings. She changed the function, culture and impact of HR from transactional to supporting the needs and aspirations of the evolving workforce.

Previous to this role, Michelle led the HR team at Bloomingdale’s as the Operating Vice President for the New York City Trade area where was responsible for the development and implementation of the talent strategy during a time of significant changes in the retail landscape.

Michelle received her undergraduate and Master’s degrees from Northern Arizona University.

Diana Goell Voigt,

General Counsel

Diana is a strategic partner in managing the legal affairs of PAGNY and serves as the legal advisor to the Board of Directors as General Counsel.

Diana has practiced law for over twenty years. Her extensive experience includes representing employers in civil rights, labor and employment administrative/agency proceedings and actions in state and federal court. Prior to joining PAGNY, Diana was a Senior Attorney in the Law Department for Consolidated Edison Company of New York, Inc. where she worked closely with senior management on employment related matters. Earlier in her career, Diana was a Senior Counsel in the Labor and Employment Law Division in the New York City Law Department. She joined the City’s Law Department in 2001 following several years in private practice. For almost nine years, she supervised a team of attorneys while continuing to provide strategic legal advice to various City agencies and NYC Health + Hospitals, on complex matters.

Diana earned her Bachelor of Arts degree from Kenyon College and her Juris Doctor degree from Vermont Law School. She has been a speaker on employment law topics, and was a Lecturer-in-Law at Columbia University School of Law, teaching a seminar on the role of attorneys in government.

Jorge I. Montalvo,

Chief Operating Officer

As Chief Operating Officer, Jorge plays a leading role on PAGNY’s executive management team. He oversees the operations at PAGNY’s affiliated hospitals as well as at the Rikers Correctional Center and manages PAGNY staff. He participates in the negotiation and the administration of the organization’s hospital affiliation contract with NYC Health + Hospitals. Additionally, he leads PAGNY's administrative standardizations efforts, strategic marketing and community initiatives and government relations.

Previously, Mr. Montalvo devoted several decades to public service. Mr. Montalvo was the Founder and the Executive Director of the New York State Office for New Americans and served as New York Deputy Secretary of State for Economic Opportunity. He also advised members of the Medicaid Delivery System Reform Incentive Payment (DSRIP) Program advisory board, with a particular focus on structure and payment points for community-based health facilities, workforce development and the social determinant of health. Prior to joining PAGNY, Mr. Montalvo served as the Deputy Executive Director of the 2018 NYC Charter Revision Commission. He started his career in the private sector working in corporate relations and public engagement for the New York City 2012 Olympic Bid Committee and, then served in various capacities in New York City government. Mr. Montalvo graduated from Dartmouth College with a degree in Chemistry.


Bijan Safai, M.D., D.Sc.


An internationally recognized and award winning dermatologist, Dr. Safai is the Professor and Chairman of the Department of Dermatology at New York Medical College, and the Chief of Dermatology at NYC Health + Hospitals/ Metropolitan. Renowned for his expertise and the research he has conducted in association with skin cancers, sarcoma and lymphomas of the skin, he served as Chief of Dermatology Service and Director of the service’s research program at Memorial Sloan Kettering Cancer Center (MSKCC) for almost two decades. Dr. Safai received his medical degree from the Tehran University School of Medicine in Tehran, Iran. He trained in internal medicine and dermatology at New York University Medical School, and completed a fellowship in immunology at MSKCC. His research work in immunology earned him a Doctor of Medical Sciences degree (D.Sc.) from the University of Gothenburg in Sweden.

"This just might be the most challenging time to be involved in the delivery of public healthcare. But it also is a tremendously rewarding endeavor. It’s not a job; it’s a calling."

Edward Chew, M.D.

Vice President

Dr. Edward Chew is the Chief of Emergency Medicine at PAGNY for NYC Health + Hospitals/Harlem.

"I am motivated everyday by my team in the emergency department. We are truly working in a team environment. Everyone has the same goal of providing the best care possible to every patient. My team is motivated by working together and on improving the department as a whole. Our improvements focus on education to our residents and nursing colleagues, and monitoring and lowering stroke and cardiac MI numbers."

Ngozi Nwankpa, M.D.


Dr. Ngozi Nwankpa is a board-certified Obstetrician Gynecologist and Simulation Educator on staff at Harlem Hospital Center. She is passionate about delivering quality care to vulnerable populations and strongly believes that everyone deserves attentive and compassionate care, even more so communities where greater health disparities exist. During her tenure at Harlem Hospital, Dr. Ngozi Nwankpa has worked on quality improvement efforts aimed at reducing maternal morbidity and mortality and premature birth disparities using simulation and an innovative model of prenatal care called Centering Pregnancy.

Lisa A. Ross, M.D., MBA


Lisa A. Ross, MD, MBA joined the staff of NYC Health + Hospitals/Harlem in 2010, became the Director of the Department of Anesthesia in 2012 and is an Associate Clinical Professor of Anesthesia at Columbia University Medical Center. Prior to that she was Program Director in the Department of Anesthesia at St. Vincents Catholic Medical Center in Manhattan.

She earned her A. B. in biology from Harvard University and her M.D. from Columbia University College of Physicians and Surgeons. Her anesthesia residency was completed at Presbyterian Hospital with a focus on neuroanesthesia. Dr. Ross has presented at many anesthesia conferences, has written numerous abstracts and has authored a chapter in a text book that addresses anesthesia in areas outside of the operating room. She serves on several committees within the hospital and is very active in the Dr. Muriel Petioni Women Chiefs’ Council. In 2013 she earned an Executive MBA from Fordham University.

Leaque Ahmed, M.D.

Dr. Ahmed is the Director of Surgery at NYC Health + Hospitals/Harlem, where he also serves as Medical Director of Bariatric Surgery since 2004. He is an Assistant Clinical Professor of Surgery at the Columbia University College of Physicians and Surgeons and an Attending Surgeon at the Lawrence Hospital Center for Advanced Surgery in Bronxville, New York. Dr. Ahmed earned his medical degree at Kilpauk Medical College in Madras, India, and then trained at Columbia University Medical Center in the field of endocrine and pancreatic surgery. He was a surgical resident at the Royal College of Physicians and Surgeons in Glasgow, United Kingdom, and a general surgery resident at NYC Health + Hospitals/Harlem.

Chinyere Anyaogu, M.D.


Dr. Anyaogu is the Vice Chair of the department of Obstetrics, Gynecology and Women’s Health at NYC Health + Hospitals/North Central Bronx. Dr. Anyaogu received her medical degree from the College of Medical Sciences and Dentistry, University of Nigeria, and a Master in Public Health degree from Columbia University. She completed residencies in Internal Medicine and OB-GYN at Albert Einstein/Montefiore Medical Center. Prior to joining North Central Bronx, Dr. Anyaogu served as an OB-GYN Attending Physician at several medical facilities in North Carolina and served as Medical Director of the Women’s Care Center in Huntersville, North Carolina. Dr. Anyaogu serves as an Assistant Professor at Albert Einstein College. She is also on the board of the Physician Affiliate Group of New York, P.C. where her interest is in improving outcomes in the county she serves. Dr. Anyaogu will soon complete a fellowship in a Clinical Quality Fellowship program for patient safety.

Stephen D. Apfelroth, M.D.


Dr. Apfelroth has been the Director of Clinical Laboratories and Blood Bank at NYC Health + Hospitals/North Central Bronx and NYC Health + Hospitals/Jacobi since 1998, and is also an Assistant Professor of Pathology at Albert Einstein College of Medicine. A native of the Bronx, Dr. Apfelroth graduated from Harvard College, and earned his M.D. and Ph.D. in Immunology at the State University of New York – Downstate. He also successfully completed his residency in pathology at New York University, as well as a fellowship in blood banking at New York Blood Center. In addition, Dr. Apfelroth has an MBA in Information Technology from Iona College Hagen School of Business. Dr. Apfelroth is board certified in Anatomic and Clinical Pathology, Transfusion Medicine, and Clinical Informatics and serves on the Board of Directors of the Council of Hospital Blood Bank Directors of the Greater New York Region.

Stephen M. Blumberg, M.D.


Dr. Blumberg is the Assistant Director of the Pediatric Emergency Department at NYC Health + Hospitals/Jacobi, and the Fellowship Director for the program in Pediatric Emergency Medicine. Dr. Blumberg earned his undergraduate degree from Tufts University and his medical degree from MCP/Hahnemann University School of Medicine. He completed a Residency in Pediatrics at North Shore University Hospital and a Fellowship in Pediatric Emergency Medicine at Jacobi. Dr. Blumberg serves as the Principal Investigator on numerous research studies, receiving grants for his work involving children who have sustained abdominal trauma, febrile infants, and pediatric emergency medicine patient safety issues. He is an active member of the Jacobi trauma and trauma peer review committees and he previously chaired the NYMA fringe benefit (HR) committee. He is also involved in the development of the Jacobi Injury and Violence Prevention Program and in obtaining a Criminal Justice grant for its funding.

Roger Chirurgi, M.D.


Dr. Chirurgi is program director for Emergency Medicine at NYC Health + Hospitals/Metropolitan, where he serves as a member of the Medical Executive Committee (Medical Board), Credentials Committee, ED Steering Team, ED Management Committee, and Anesthesia/Operative and Other Invasive Procedures Committee, as well as being the Director of Simulation. At New York Medical College, he is the Emergency Medicine Clerkship director; a member of the College Faculty Senate, Leave of Absence and Readmission Committee, and Curriculum Committee; and faculty advisor and mentor for the Emergency Medicine Club. Dr. Chirurgi is the recipient of the 2011 Conference of Residency Directors Faculty Teacher of the Year Award. He graduated in 1994 from the Mount Sinai School of Medicine and completed his residency training in emergency medicine at St. Luke’s-Roosevelt Hospital Center.

Daniel Contractor, M.D.

Dr. Contractor is Chairperson of the Department of Radiology and section chief of the Department of Interventional Radiology since 2004 at NYC Health + Hospitals/Coney Island. He earned his medical Degree and completed a residency in general surgery from Grant Medical College in Bombay, India and is Board Certified in General Surgery. Dr. Contractor moved to the United States and completed a residency training in General Surgery at Maimonides Medical Center, as well as a residency in Diagnostic Radiology from New York Methodist Hospital, both located in Brooklyn, NY. He went on to do a Fellowship in Interventional Radiology from University of Texas Medical Branch at Galveston Texas. Dr. Contractor is Board Certified in Diagnostic Radiology with a certificate of added Qualification in Interventional Radiology. Prior to joining Coney Island Hospital he was Assistant Professor in Radiology at UMDNJ at Newark NJ.

Vihren G. Dimitrov, M.D.


Dr. Dimitrov is Chief of Medicine at NYC Health + Hospitals/Lincoln and has served in several capacities at Lincoln since 1998, when he was appointed an Attending Physician. Since then, he has served as Lincoln’s Program Director as well as Associate Program Director and Lincoln’s Chief Medical Information Officer. He also played an important role in the creation of PAGNY.

Dr. Dimitrov, a native of Bulgaria, received his medical degree at the Higher Institute of Medicine in the Medical Academy, Sofia, Bulgaria. After serving his residency in internal medicine at Lincoln in New York City, he returned to practice medicine in Bulgaria, including a stint as the medical doctor at the American embassy in Sofia.

In addition to his position at Lincoln, Dr. Dimitrov is Assistant Clinical Professor of Medicine at Weill Medical College in New York and Assistant Professor of Medicine at St. George’s School of Medicine in Granada.

Kenneth Hupart, M.D.


PAGNY Dr. Kenneth H. Hupart has been appointed the Chairperson of the Department of Medicine at NYC Health + Hospitals/Coney Island. Dr. Hupart is a diplomate of both the American Board of Internal Medicine and the National Board of Medical Examiners and has been named to Castle Connolly’s “Top Docs” in America. Dr. Hupart completed his undergraduate degree at Columbia University and Sophie Davis School of Biomedical Education. He received his medical degree from SUNY Stony Brook, and is a Fellow of the American College of Physicians. Dr. Hupart is a published author and has held numerous teaching positions. Prior to his appointment, Dr. Hupart was the Chief of Endocrinology, Diabetes and Metabolism at Nassau University Medical Center.

Gregory Girshin, M.D., Ph.D.


Dr. Gregory Girshin is the Chairman of Anesthesiology at NYC Health + Hospitals/Coney. An experienced clinical anesthesiologist and a Physician-Leader with extensive exposure to various healthcare organizations in Russia, Israel and the United States.   He graduated Magna Cum Laude from the 2ND Moscow University Medical School in Russia in 1984.  He proceeded with training in general surgery, combining clinical work with extensive experimental research.  In 1987, Dr. Girshin was awarded a Ph.D. degree for his studies in Acute Pancreatitis. 

Dr. Girshin later moved to Israel where he worked for a short period of time as a surgeon.  He later moved to the United States and completed residency in Anesthesiology at Montefiore Medical Center, Albert Einstein College of Medicine, serving as a Chief Resident during his last year of training for which he was awarded the Best Resident of the year.  He later continued his studies and completed Fellowship in Pain Management at Roosevelt Hospital Center in Manhattan.

Dr. Girshin is Board Certified in Anesthesiology and Pain Management by The American Board of Anesthesiology. He dedicated a larger part of his professional career in Anesthesiology to H+H,  serving in a leadership capacity at Jacobi Medical Center, North Bronx Healthcare Network and Harlem Hospital Center.

Akinola Fisher, M.D.


Dr. Fisher is the Chief of Ambulatory Care at NYC Health + Hospitals/Lincoln. He graduated from the University of Ibadan College of Medicine in Ibadan, Nigeria, and went on to several years of training in obstetrics and gynecology in the United Kingdom. Dr. Fisher relocated to the United States in 1997 and completed an internal medicine residency at Englewood Hospital and Medical Center in New Jersey, where he received the Excellence in Ambulatory Medicine Award as well as an award for professionalism in medicine. He then practiced at St. Dominic’s Family Health Center in Jamaica, Queens. Dr. Fisher was subsequently named Medical Director of the Walton Avenue location of the Morris Heights Health Center, and eventually became Deputy Chief Medical Officer.

Shefali Khanna, M.D.


Dr. Khanna has been the Chairperson of the Department of Pediatrics at Lincoln Medical Center since April 2010.  She is Assistant Professor of Clinical Pediatrics at Weill Cornell Medical College, where she served on the General Faculty Council.  Dr. Khanna graduated medical school from Seth G.S. Medical College & K.E.M. Hospital, Mumbai, India.  She completed her residency and Chief Residency at St. Luke’s-Roosevelt Hospital Center, University Hospital of Columbia University College of Physicians & Surgeons.  Upon completion of her training in 1998, she joined the Department of Pediatrics at Lincoln Medical Center as a Pediatric Hospitalist.  In November 2019, Dr. Khanna successfully passed the first examination in Pediatric Hospital Medicine conducted by the American Board of Pediatrics. As a faculty member, she has been actively involved in the education of pediatric residents and medical students.  In addition to her clinical and teaching responsibilities Dr. Khanna is a member of numerous departmental and hospital wide committees. 

She has an interest in improving operational efficiency to enhance quality of care and patient safety. Dr. Khanna remains a strong advocate for the well-being and education of children in the hospital and the community that she serves.

Ashok Khanna, M.D.


Dr. Khanna is an attending physician, Division of Cardiology, at NYC Health + Hospitals/Coney Island, and clinical associate professor of medicine at SUNY Downstate College of Medicine. He earned his medical degree at Government Medical College, Punjabi University, Patiala, in Punjab, India. He did his internship at Long Island College Hospital and his residency at Beekman Downtown Hospital, completing his cardiology fellowship at Coney Island Hospital, where he became an attending physician in the Emergency Department and, later, in the Division of Cardiology. Board certified in internal medicine, cardiology and emergency medicine, Dr. Khanna also is certified by the American Society of Echocardiography and American Society of Nuclear Cardiology. He is a fellow of the American College of Cardiology, the American Heart Association and the American Society of Echocardiography. He has authored several publications and abstracts in the field of cardiology.

Peter K. Kim, M.D., M.M.M.


Dr. Kim is a General, Trauma, and Oncologic Surgeon at NYC Health + Hospitals/Jacobi and NYC Health + Hospitals/North Central Bronx. He is also an Associate Professor of Clinical Surgery at the Albert Einstein College of Medicine. He is a graduate of Harvard College and Weill Medical College of Cornell University, where he received his M.D. degree with Honors in Research. Dr. Kim spent a year at the NIH with a Howard Hughes Medical Institute Fellowship, then completed a General Surgery Residency with three additional years of surgical research at the University of Pittsburgh and UPMC hospitals. Dr. Kim completed a Clinical Quality Fellowship Program sponsored by the Greater New York Hospital Association and United Hospital Fund. Most recently, he completed a Master’s degree in Medical Management at the University of Southern California Marshall School of Business.

Warren Seigel, M.D., M.B.A., F.A.A.P.


Dr. Warren Seigel, Chairman of Pediatrics at NYC Health + Hospitals/Coney Island, he has been treating kids for the past 30 years. After graduating from Adelphi University in 1978, he earned his medical degree from Universidad CETEC in the Dominican Republic and returned to his native New York for his residency and fellowship at The Brookdale University Hospital Medical Center in Brooklyn. Dr. Seigel's distinguished career includes AAP District II Chair representing New York state, Board-certified in adolescent medicine, he has testified before Congress on universal access to comprehensive health care, published dozens of articles on adolescent medicine and co-authored the 2011 AAP policy Male Adolescent Sexual and Reproductive Health Care.

In addition to having directed adolescent medicine at several New York hospitals, he is an associate professor of clinical pediatrics at SUNY-Health Science Center. Well-known for his advocacy on behalf of primary care pediatricians, he is past president of the Brooklyn Pediatric Society and the New York Regional Society for Adolescent Medicine.

He also is past president of New York Chapter 2 and has served on the AAP Section on Adolescent Health Executive Committee and Committee on Adolescence.

"It's really an honor to be allowed to take care of people's children, the trust that they have in us, in the medical profession, is a humbling experience."

Jeremy Sperling, M.D.


Dr. Jeremy Sperling is the Chair of Emergency Medicine at NYC Health + Hospitals /Jacobi and NYC Health + Hospitals/North Central Bronx. He is an Associate Professor of Emergency Medicine at the Albert Einstein College of Medicine.  Dr. Sperling is the co-chair of the NYC Health + Hospitals Emergency Medicine Council.  Dr. Sperling earned his undergraduate degree from Cornell University and his medical degree from the Albert Einstein College of Medicine. He completed his residency training in Emergency Medicine at Bellevue / New York University Medical Centers where he also served as a Chief Resident.  Dr. Sperling has received multiple teaching awards including the American College of Emergency Physicians (ACEP) National Emergency Medicine Faculty Teaching Award.  

Ronnie Swift, M.D.


Dr. Ronnie Gorman Swift is the Chief of Psychiatry and Associate Medical Director for NYC Health + Hospitals/Metropolitan. In addition, she is Professor and Associate Chairman of Psychiatry and Behavioral Health at New York Medical College. In 2017, Dr. Swift also became a member of the Board of Directors of Search & Care. Dr. Swift is included in Who’s Who in America, Who’s Who in the World and received America’s Top Psychiatric Award given by Consumers’ Research Council of America.

Dr. Swift is a recipient of numerous accolades over her career. In May 2005, New York Medical College selected Dr. Swift as the first recipient of the Sidney E. Frank Visiting Professor Award. This program established a visiting professor exchange program between New York Medical College and Hadassah University in Israel. In September 2005, Dr. Swift was awarded Honorary Membership in the World Psychiatric Association for her “contributions to Psychiatry.” Meanwhile, Dr. Swift is considered an expert on the clinical manifestations of Wolfram Syndrome. In addition, she has published articles in several scientific journals including The Lancet, Science, The Proceedings of the National Academy of Science, and Biological Psychiatry, to name a few.

She has been a member of the teaching faculty of the Neuroscience Education Institute (NEI) since 2005 and since 2008 has served as the Chairman of their Continuing Education Committee. NEI is a leading provider of Psychiatric Continuing Education.

Dr. Swift is a graduate of the City College of New York with a degree in chemistry and earned her medical degree at the University of North Carolina School of Medicine.

Cara Taubman, M.D. M.P.H


Dr. Cara Taubman is an Emergency Physician at Harlem Hospital where she is the Assistant Director for the Emergency Department,  Clinical Director of Emergency Management for the hospital and Assistant Program Director for the Met-Harlem Emergency Medicine residency. She graduated from New York Medical College with an MD and MPH and completed her Emergency Medicine residency at Jacobi and Montefiore Medical Centers where she served as Chief Resident. During residency she received Leo M. Davidoff society’s Award for Medical Student Education and Emergency Physician of the year. After residency she went on to a Global Emergency Medicine fellowship at Columbia University where she worked with the Ministries of Health in both Ghana and Rwanda and for Doctors Without Borders.

Daryl Wieland, M.D


Dr. Daryl Wieland is the Chair of Obstetrics & Gynecology at Jacobi and North Central Bronx and Associate Professor of Obstetrics & Gynecology at Albert Einstein College of Medicine. She earned her undergraduate degree from Yale University and her medical degree from Columbia University College of Physicians and Surgeons. After residency at Mount Sinai Medical Center, she took her first attending position at Jacobi in 1998. In addition to her clinical and teaching experience, Dr Wieland’s interest in improving the electronic medical record and collecting better data for reuse led her to complete her master’s degree in clinical informatics from Northwestern University.  Board certified in clinical informatics, she has served in the role of Chief Medical Informatics Office at Jacobi.