Dr. Marc L. Greenwald
Overview
"Marc Lehrer Greenwald, MD, is the chief of colorectal clinical services and surgeon-in-chief at North Shore University Hospital. He is a double board-certified colorectal surgeon who specializes in minimally invasive and sphincter sparing techniques to treat a wide range of diseases and disorders of the small intestine, colon, rectum and anus. This includes diverticulitis, Crohn's disease, ulcerative colitis and colorectal cancer.""I'm really fortunate to work with an amazing team at North Shore,"" Dr. Greenwald says. ""They share my passion for helping others, and together, we are making a difference in the lives of so many people.""After receiving his medical degree from the Albert Einstein College of Medicine, Dr. Greenwald completed his residency at Montefiore Medical Center and fellowship in Hartford, Connecticut. He joined Northwell in 1991, and has held many leadership positions at North Shore University Hospital, including president of the medical staff and chair of the medical board.Dr. Greenwald established the Enhanced Recovery Program at North Shore University Hospital, implementing protocols that provide easy, safe and rapid recovery after surgery. ""The program helps patients recover faster, get home to their families sooner and have better results,"" he says. His team also leads the way in delivering the best outcomes and highest quality care, consistently scoring above the national average in quality surveys.As program director of the rectal cancer multidisciplinary team, Dr. Greenwald works closely with other Northwell experts-including medical oncologists, radiation oncologists and colorectal surgeons-to evaluate every patient with rectal cancer. ""It's my job to make sure best practices are used and patients receive individualized care with guided support from start to finish.""Dr. Greenwald is an assistant professor of surgery at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell and has won multiple teaching awards, including the Department of Surgery Award for Excellence in Operative Teaching. He is also a Castle Connelly Top Doctor.Decades of being a surgeon have given Dr. Greenwald a greater awareness about his patients. ""It's not just about treating their illness,"" he says. ""It's about understanding their illness as it relates to everything else in their lives. You need that global perspective to truly understand what the patient is going through.""".
Dr. Greenwald is rated as an Experienced provider by MediFind in the treatment of Meckel's Diverticulum. His top areas of expertise are Ogilvie Syndrome, Familial Colorectal Cancer, Diverticular Disease, Hernia Surgery, and Bladder Reconstruction.
His clinical research consists of co-authoring 4 peer reviewed articles. MediFind looks at clinical research from the past 15 years.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- OTHER COMMERCIAL
- OTHER MEDICARE PART D
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- POS
- HMO
- INDEMNITY
- POS
- PPO
- OTHER MANAGED MEDICAID
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- EPO
- HMO
- POS
- PPO
- MEDICARE DISCOUNT CARD
- MEDICARE PDP
- OTHER MEDICARE
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
310 East Shore Road, Suite 203, Great Neck, NY 11023
900 Northern Boulevard, Suite 100, Great Neck, NY 11021
Additional Areas of Focus
Dr. Greenwald has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
Westchester Medical Center Advanced Physician Services PC
Jamal Mahdavian is a General Surgeon and a Colorectal Surgeon in Valhalla, New York. Dr. Mahdavian is rated as an Advanced provider by MediFind in the treatment of Meckel's Diverticulum. His top areas of expertise are Cellulitis, Omphalomesenteric Cyst, Hernia, Hernia Surgery, and Small Bowel Resection.
Steven C Tizio MD, LLC
Steven Tizio is a Colorectal Surgeon in Neptune, New Jersey. Dr. Tizio is rated as an Advanced provider by MediFind in the treatment of Meckel's Diverticulum. His top areas of expertise are Retroperitoneal Inflammation, Hemorrhoids, Pilonidal Sinus Disease, Hemorrhoidectomy, and Hernia Surgery.
Northwell Health Physician Partners Surgical Specialties At Woodbury
"David E. Rivadeneira, MD, MBA, FACS, FASCRS, is director of Northwell Health Cancer Institute at Huntington and physician-in-chief of clinical strategic initiatives for Northwell facilities across eastern Long Island. He's a board-certified, multilingual general surgeon and colorectal surgeon who provides leading-edge care for colon and rectal cancer, inflammatory bowel disease such as ulcerative colitis and Crohn's disease, as well as diverticulitis.""I've always wanted to help people,"" says Dr. Rivadeneira, who completed his residency in general surgery at Weill Medical College of Cornell University, training at both New York-Presbyterian/Weill Cornell Medical Center and Memorial Sloan Kettering Cancer Center.Dr. Rivadeneira, who joined Northwell in 2013, works alongside a multidisciplinary team including oncologists, geneticists and nutritionists to give patients complete and convenient care. Consultations can usually be made within 24 to 48 hours at various Long Island locations-and everyone receives the care they deserve. ""I treat people like I'd want a family member to be treated,"" says Dr. Rivadeneira. ""I speak to patients in a way that helps them really understand their care-it's clear, concise and always compassionate.""A professor of surgery at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Dr. Rivadeneira also instructs surgeons throughout the country and abroad. He is a fellow of the American College of Surgeons, the American Society of Colon and Rectal Surgeons and the Society of Surgical Oncology, among others. He also works closely with Northwell research partner Cold Spring Harbor Laboratory on tissue analysis for critical research studies for the very best patient care-now and in the future.""Seeing patients have better quality of life with no more pain, and seeing them enjoy major life milestones because of treatment-it just doesn't get any better than that,"" he says.". Dr. Rivadeneira is rated as a Distinguished provider by MediFind in the treatment of Meckel's Diverticulum. His top areas of expertise are Hemorrhoids, Familial Colorectal Cancer, Diverticular Disease, Bladder Reconstruction, and Hernia Surgery.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Distinguished
- Colorectal CancerDr. Greenwald isDistinguished. Learn about Colorectal Cancer.
- Diverticular DiseaseDr. Greenwald isDistinguished. Learn about Diverticular Disease.
- Familial Colorectal CancerDr. Greenwald isDistinguished. Learn about Familial Colorectal Cancer.
- Levator SyndromeDr. Greenwald isDistinguished. Learn about Levator Syndrome.
- Ogilvie SyndromeDr. Greenwald isDistinguished. Learn about Ogilvie Syndrome.
- Rectal ProlapseDr. Greenwald isDistinguished. Learn about Rectal Prolapse.
- Advanced
- Anal FissureDr. Greenwald isAdvanced. Learn about Anal Fissure.
- Bladder ReconstructionDr. Greenwald isAdvanced. Learn about Bladder Reconstruction.
- HemorrhoidsDr. Greenwald isAdvanced. Learn about Hemorrhoids.
- Hernia SurgeryDr. Greenwald isAdvanced. Learn about Hernia Surgery.
- Lynch SyndromeDr. Greenwald isAdvanced. Learn about Lynch Syndrome.
- Mesenteric Venous ThrombosisDr. Greenwald isAdvanced. Learn about Mesenteric Venous Thrombosis.
- Experienced
- Anal CancerDr. Greenwald isExperienced. Learn about Anal Cancer.
- Bowel IncontinenceDr. Greenwald isExperienced. Learn about Bowel Incontinence.
- ColitisDr. Greenwald isExperienced. Learn about Colitis.
- Crohn's DiseaseDr. Greenwald isExperienced. Learn about Crohn's Disease.
- EmphysemaDr. Greenwald isExperienced. Learn about Emphysema.
- EncopresisDr. Greenwald isExperienced. Learn about Encopresis.