Status: Providers

Dr. Andrew Lazar, a board-certified general surgeon, joined The Vascular Care Group in Darien, Connecticut, after completing his vascular surgery fellowship at New York University. With a deep foundation in patient-centered vascular care, academic research, and medical education, he brings a comprehensive and innovative approach to diagnosing and treating vascular disease.

Dr. Lazar earned his medical degree from Weill Cornell Medical College and completed his general surgery residency at Morristown Medical Center. He also completed a postdoctoral research fellowship at Columbia University Medical Center, where he studied cardiovascular disease and vascular surgery outcomes.

He has co-authored numerous peer-reviewed publications in leading medical journals, with research spanning carotid revascularization, health equity in vascular access, peripheral arterial disease, and telehealth adoption in surgical care. Dr. Lazar has also contributed to national vascular surgery meetings and served as both a host and guest contributor for the Audible Bleeding podcast series.

A dedicated educator and advocate for system improvement, Dr. Lazar has been recognized with multiple teaching and humanitarian awards. He remains actively involved in clinical education, surgical curriculum development, and mentorship initiatives. He is a member of the Society for Vascular Surgery, the Society for Clinical Vascular Surgery, and the American College of Surgeons.

Fluent in conversational Spanish and passionate about community health, Dr. Lazar is committed to delivering exceptional, inclusive vascular care. Outside the clinic, he is a devoted husband and father who enjoys spending time with his family, playing soccer, kayaking, and cooking.

Dr. Justin Yu joined The Vascular Care Group’s offices on Cape Cod following his Vascular Surgery Fellowship at the Ochsner Clinic Foundation in New Orleans. During his fellowship training he treated a broad range of pathologies including aortic aneurysms, carotid disease, peripheral arterial disease, and venous insufficiency. He brings a strong foundation in both clinical practice and academic research. Dr. Yu earned his Medical Degree from The Warren Alpert Medical School of Brown University and holds a Master of Science degree from Columbia University, where he conducted advanced research in metabolic disease. He completed his General Surgery Residency at the Zucker School of Medicine at Hofstra/Northwell in New York.

Throughout his career, Dr. Yu has demonstrated a strong interest in improving outcomes for patients with vascular disease, particularly those undergoing dialysis access procedures and peripheral arterial disease. He has published in peer-reviewed journals and presented nationally on topics including frailty, sex disparities in hemodialysis access and the impact of delayed care on amputation rates.

Dr. Yu is a member of the Society for Vascular Surgery, the Vascular and Endovascular Surgery Society, and the Gulf Coast Vascular Surgery Society. His approach to care emphasizes thoughtful, patient-centered decision-making and a dedication to evidence-based surgical practice.

Outside of the clinic, Dr. Yu brings a research-driven perspective and enthusiasm for mentorship and education. He is committed to delivering compassionate vascular care while advancing innovation in the field.

Dr. Ammar Humayun, a board-certified general surgeon, joined The Vascular Care Group’s Worcester office following his vascular fellowship at the University of Connecticut/Hartford Hospital. He brings a strong foundation in complex vascular and general surgery, along with extensive clinical research experience and a passion for academic advancement in vascular care.

Dr. Humayun completed his medical education at Dow Medical College in Pakistan before pursuing postdoctoral research at Mayo Clinic Florida. He trained in general surgery at Hahnemann University Hospital and Crozer-Chester Medical Center, where he gained broad operative and critical care experience across a range of surgical subspecialties.

Throughout his career, Dr. Humayun has remained actively engaged in clinical research. He has co-authored multiple peer-reviewed publications on topics ranging from endovascular interventions and orthopedic trauma to cancer care and critical illness. His presentations at national vascular surgery conferences, including the Society for Clinical Vascular Surgery and the Eastern Vascular Society, highlight his commitment to innovation and clinical excellence.

Dr. Humayun is fluent in Urdu. He enjoys building rapport with diverse patient populations and is committed to delivering thoughtful, evidence-based vascular care.

Outside of medicine, he is an avid tennis and squash player and enjoys spending time outdoors with his family.

Dr. Laura Boitano is a board-certified vascular surgeon who provides comprehensive vascular and endovascular care to patients across Wellesley and Framingham, Massachusetts, and the surrounding communities. She offers expertise in both minimally invasive and open vascular surgical procedures, with a focus on aortic aneurysms, carotid disease, peripheral artery disease, including chronic limb-threatening ischemia, and venous conditions. Dr. Boitano is also skilled in cosmetic procedures for the treatment of spider and varicose veins.

She graduated summa cum laude from Georgetown University with a degree in Human Science and earned her medical degree from Northwestern University’s Feinberg School of Medicine. Dr. Boitano completed an integrated vascular surgery residency at Massachusetts General Hospital, where she conducted two years of vascular research and earned a Master of Public Health in Clinical Effectiveness from the Harvard T.H. Chan School of Public Health. She also holds a Registered Physician in Vascular Interpretation (RPVI) certification.

Prior to joining The Vascular Care Group, Dr. Boitano served as Assistant Professor of Surgery at the University of Massachusetts Medical School and Medical Director of the UMass Program for Aortic Screening and Surveillance. In this role, she advanced care for patients with aneurysmal disease and led community outreach efforts to improve access to vascular services.

A dedicated researcher and educator, Dr. Boitano has published widely in peer-reviewed journals, presented nationally, and is active in several regional and national societies. She is a member of the Society for Vascular Surgery’s Resident and Student Outreach Committee (2024–2027). She remains committed to advancing limb preservation strategies and improving outcomes for women with vascular disease, an area often underrepresented in research, while maintaining her broader commitment to delivering high-quality, patient-centered care to all individuals.

Above all, Dr. Boitano takes a collaborative, patient first approach, striving to deliver compassionate, expert care tailored to each person’s unique needs.

Dr. Swati Chaparala is a board-certified vascular surgeon with advanced training in both open and endovascular techniques. She brings a wealth of expertise to The Vascular Care Group, with clinical interests that include peripheral arterial disease, limb salvage, dialysis access, and complex aortic pathology.

Dr. Chaparala earned her medical degree from Northeast Ohio Medical University and completed her advanced training in vascular and endovascular surgery at the Mayo Clinic in Rochester, Minnesota. Immediately prior to joining The Vascular Care Group, she served as an Assistant Professor in the Division of Vascular Surgery at the University of Maryland School of Medicine, where she also led the medical student clerkship program in vascular surgery.

She has authored multiple peer-reviewed publications and presented her research at national and international vascular conferences. Dr. Chaparala is an active member of the Society for Vascular Surgery and the Alpha Omega Alpha Honor Medical Society. She is passionate about improving access to care and advancing the field through education and innovation.

In addition to her clinical work, Dr. Chaparala speaks Spanish at a working level, helping her communicate effectively with a diverse patient population. She is committed to delivering compassionate, patient-centered vascular care in a collaborative outpatient setting.

Dr. Alison Messina is a Board-certified vascular surgeon who joined The Vascular Care Group’s Hyannis, MA office following her vascular fellowship at Temple University Hospital in Philadelphia, PA. She has received several recognitions as a skilled surgeon and is enthusiastic about surgical techniques and innovations. Dr. Messina is committed to lifelong learning and has been involved in numerous research projects and publications.

After studying healthcare management, Dr. Messina earned her medical degree from the University of Connecticut Health Center in Farmington, CT, and completed her general surgery residency at Mount Sinai South Nassau in Oceanside, NY.

Dr. Messina is dedicated to providing compassionate, patient-centered care and believes in a multidisciplinary approach to treatment, working closely with other specialists to ensure the best outcomes for her patients. She promotes preventative care and empowering patients to better understand their health.

Outside of the operating room, Dr. Messina values spending quality time with her husband and growing family, as well as exploring the outdoors with their retriever. She enjoys cooking, golf, and skiing, leading a busy, well-rounded life.

She is excited to join Drs. Gorin, Rosen, and Phillips, and the team in Hyannis and looks forward to serving the community with the highest level of vascular care.

Naiem Nassiri, MD, FSVS, RPVI is a board-certified vascular surgeon, and an outgoing, meticulous, and innovative physician with broad clinical and academic interests.

Naiem graduated Cum Laude with his Bachelor of Science in Biological Sciences from the University of California, Irvine, earned his Doctor of Medicine from Oregon Health & Science University School of Medicine, and was one of the first 6 individuals in the country to complete an integrated residency in vascular & endovascular surgery graduating from the Lenox Hill Heart & Vascular Institute of New York, Lenox Hill Hospital in 2013.

Before joining The Vascular Care Group, Dr. Nassiri served as Associate Professor of Surgery (Vascular) at the Yale School of Medicine, where he remains a voluntary, adjunct faculty; Chief of Vascular and Endovascular Surgery, VA Connecticut Healthcare System in West Haven, CT; Director of the Vascular Malformations Program, at Yale New Haven Hospital in New Haven, CT; and an integral member of the world-renowned Aortic Institute at Yale, where he performed the first physician-assembled, branched, endovascular thoracoabdominal aortic aneurysm repair at Yale New Haven Hospital in October 2021. He is a member of the Editorial Board of the Journal of Vascular Surgery; serves as a Special Government Employee for the United States Food & Drug Administration’s Center for Devices and Radiological Health; and is a Key Opinion Leader, Medical Advisory Board Member, and Proctor for numerous industry partners in the aortic and peripheral space.

He was, previously, the Founding Director of the Vascular Anomalies & Malformations Program and, Co-founder and Co-director, Pelvic Vascular Disease Program at Rutgers Robert Wood Johnson University Hospital and Bristol-Myers Squibb Children’s Hospital in New Brunswick, NJ.

Throughout his career, he has had a broad range of experience in clinical research in vascular surgery where he has served primarily as a principal investigator. Dr. Nassiri holds a provisional international patent for “Compositions and Methods for Treating Slow-Flow Vascular Malformations” and has founded two companies related to vascular disease, with an emphasis and expertise in targeted intralesional drug delivery. He is currently the global principal investigator for the first-ever use of therapeutic ultrasound technology for non-invasive ablation of vascular malformations. As such, Naiem is a much sought-after speaker with podium presentations at international, national, regional, and local meetings, as well as numerous peer-reviewed journal publications, books, book chapters and educational materials.

As a provider, Dr. Nassiri has a special interest in the comprehensive diagnosis and multi-faceted management of vascular anomalies and malformations, including those in the pediatric population, as well as minimally invasive treatment of complex aortic pathologies, cervical carotid disease, pelvic venous disorders, and peripheral arterial disease. He is experienced and comfortable with open, endovascular, hybrid, and medical management for vascular patients, and enjoys working in and leading multi-disciplinary settings. He treats peripheral arterial, aortic, carotid, venous (superficial and deep) disease, provides and maintains dialysis access, and treats other pathologies that encompass the field of vascular & endovascular surgery, including those requiring advanced embolotherapeutic maneuvers.

Naiem is passionate about delivering outstanding, cutting edge, minimally- and non-invasive patient-centered care for his patients and he brings his extensive experience in clinical care, research, collaboration, and dedication to advancing vascular care to provide the best possible care to the patients of The Vascular Care Group.

Hector Simosa is a Board-certified vascular surgeon with substantial training in vascular care. He received his medical degree from the Universidad Central de Venezuela in Caracas, Venezuela and furthered his medical training by completing a General Surgery Residency at the Medical College of Virginia Hospital, Virginia Commonwealth University and Boston Medical Center, Boston University. Dr. Simosa completed his vascular surgery training at Harvard Medical School Beth Israel Deaconess Medical Center Vascular Surgery Fellowship. He also completed a Vascular Surgery Research Fellowship at Brigham & Women’s Hospital Harvard Medical School. During his career, he has compiled various peer-reviewed publications and presentations at national meetings. He was honored with the Lester F. Williams Jr., MD Medical Student Teaching Award in Surgery at Boston University Medical School and was inducted into the Alpha Omega Alpha Honorary Medical Society. As a vascular surgeon, Dr. Simosa covers the full spectrum of vascular care, treating aortic aneurysms, carotid disease, deep vein thrombosis and venous disorders, renal mesenteric vascular disease, peripheral artery disease as well as managing lower extremity circulation issues and wounds in diabetic patients. He performs minimally invasive catheter procedures and open surgical reconstruction for patients. Dr. Simosa has been practicing vascular surgery since 2006. He is certified by the American Board of Vascular Surgery and in Advanced Cardiovascular Life Support (ACLS), and Basic Life Support (BLS). He is also fluent in Spanish.

Alfred J. Phillips DPM, FACFAS is a Board-certified foot and ankle surgeon with more than 30 years of experience. Dr. Phillips received his undergraduate degree from St. Lawrence University before receiving his Doctorate of Podiatric Medicine (DPM) from Temple University. He completed a three-year residency in reconstructive foot and ankle surgery at HCA Doctors Hospital/Northlake Regional Medical Center in Atlanta, G.A. Over the course of his career, Dr. Phillips has treated patients at hospitals throughout New England. The majority of this time was spent actively training podiatric surgical residents at Carney Hospital, Cambridge Health Alliance, and, most recently, St. Elizabeth Medical Center in Brighton, Mass. Dr. Phillips has also served as the Chief of the Podiatry Division for Optima Health/Catholic Medical Center, Cambridge Health Alliance and St. Elizabeth’s Medical Center. He has served as president of the Massachusetts Podiatric Medical Association and has been a member of the American Podiatric Medical Association; New Hampshire Podiatric Medical Association; Podiatric Institute; American Board of Podiatric Surgery; and American College of Foot and Ankle Surgeons. Dr. Phillips is Board-certified in foot surgery and rearfoot/ankle reconstructive surgery by the American Board of Foot and Ankle Surgery. As a member of the Podiatry Institute, Dr. Phillips has lectured locally and nationally on foot surgery to podiatry and orthopedic surgeons and is actively involved in research projects. He contributed to the McGlamry Reconstructive Foot and Ankle Textbook 5th Edition on Achilles Tendon Disorders. His clinical interests include treatment of painful flatfeet, osteoarthritis of the foot and ankle, diabetic foot reconstruction and limb salvage, revisional foot surgery, and sports injuries of the foot and ankle. When he’s not working, Dr. Phillips can be found hiking or taking long walks with his wife, Christine, and their dog, Maevie. He also enjoys birdwatching, kayaking, and watching his three children grow into independent young adults.