35 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Greenwald, Colon & Rectal Surgeon (Proctologist) in Great Neck, NY?
Dr. Marc Greenwald, MD is a Colon & Rectal Surgeon (Proctologist), who primarily practices in Great Neck, NY with 1 additional practice location. He has been practicing for over 35 years and is board certified. Dr. Greenwald graduated from Albert Einstein College of Medicine and completed his residency at Montefiore Medical Center. Dr. Greenwald is fluent in English and Spanish, and is currently seeing new patients. Dr. Greenwald’s practice accepts Medicaid, Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Greenwald’s office at (516) 482-8657.
What are Areas of Expertise for Dr. Greenwald?
Dr. Marc Greenwald, MD is a highly-rated, board-certified Colon & Rectal Surgeon (Proctologist) known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Greenwald empowers patients to confidently navigate their health journey, specializing in Anal Cancer, Anorectal Disorders, Colon & Rectal Cancer & Surgery, Colon & Rectal Cancer-Familial Polyposis, Colon Cancer Screening, Colonoscopy, Crohn's Disease, Diverticulitis, Fistula-Complex, Hemorrhoids, Laparoscopic Surgery, Telemedicine, Ulcerative Colitis, and comprehensive wellness support. Serving the Great Neck, NY community, Dr. Greenwald is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Greenwald go to medical school and complete their residency?
Fellowship: St Francis Hospital
Residency: Montefiore Medical Center
Medical School: Albert Einstein College of Medicine
Is Dr. Greenwald board certified as a Colon & Rectal Surgeon (Proctologist)?
Yes, Dr. Marc Greenwald, MD is board certified by the American Board of Colon & Rectal Surgery , American Board of Surgery
What languages does Dr. Greenwald speak?
Dr. Greenwald and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does a Colon & Rectal Surgeon (Proctologist) like Dr. Greenwald typically treat?
As a Colon & Rectal Surgeon (Proctologist), Dr. Greenwald diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Greenwald. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Colorectal Cancer
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
Also known as:
- Anal Fissure
- Anal Disorder
- Rectal Tear
- Fissure in Anus
- Perianal Fissure
ICD-10 Codes:
- K602: Anal fissure, unspecified
Also known as:
- Large Intestine Diverticulitis
- Diverticulosis and Diverticulitis
- Inflamed Colon Diverticula
- Colon Diverticular Inflammation
ICD-10 Codes:
- K5732: Diverticulitis of large intestine without perforation or abscess without bleeding
Also known as:
- Other Pre-Procedure Examination
- Various pre-op checks
- Miscellaneous pre-surgery exams
- Other pre-treatment assessments
ICD-10 Codes:
- Z01818: Encounter for other preprocedural examination
Also known as:
- Rectal Bleeding
- Gastrointestinal Bleeding
- Gastrointestinal (GI) Bleeding
- Anal Bleeding
- Blood in Stool
- Lower GI Bleed
ICD-10 Codes:
- K625: Hemorrhage of anus and rectum
Also known as:
- Digestive System Surgery Aftercare
- After Surgery
- Post-gastrointestinal surgery care
- Stomach surgery aftercare
- Bowel surgery recovery
ICD-10 Codes:
- Z48815: Encounter for surgical aftercare following surgery on the digestive system
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Hemorrhoids
- Piles
- Anal veins
- Swollen rectal veins
ICD-10 Codes:
- K648: Other hemorrhoids
What procedures does a Colon & Rectal Surgeon (Proctologist) like Dr. Greenwald typically perform?
As a Colon & Rectal Surgeon (Proctologist), Dr. Greenwald performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Greenwald. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
CPT Codes:
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- Anoscopy (Diagnostic)
- Anoscopy
- Anal Canal Exam
- Rectal Scope Exam
- Anus Diagnostic Procedure
CPT Codes:
- 46600: Anoscopy; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Laparoscopic Colon Mobilization
- Laparoscopic Partial Colon Removal
- Splenic Flexure Mobilization
- Laparoscopic Colectomy Assist
- Colon Take-down Surgery
- Minimally invasive colectomy
- Laparoscopic bowel resection
- Keyhole colon surgery
CPT Codes:
- 44213: Laparoscopy, surgical, mobilization (take-down) of splenic flexure performed in conjunction with partial colectomy (List separately in addition to primary procedure)
- 44207: Laparoscopy, surgical; colectomy, partial, with anastomosis, with coloproctostomy (low pelvic anastomosis)
Also known as:
- Flexible Sigmoidoscopy
- Colorectal Cancer Screening Tests
- Sigmoidoscopy
- Lower colon exam
- Flexible colon scope
- Rectum and lower colon check
CPT Codes:
- 45330: Sigmoidoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Rectal Prolapse Repair
- Proctoplasty
- Mucosal Prolapse Repair
- Rectal Wall Repair
CPT Codes:
- 45505: Proctoplasty; for prolapse of mucous membrane
Also known as:
- Anal Sphincter Nerve Block
- Internal Anal Sphincter Chemodenervation
- Anal Sphincter Injection
- Botox for Anal Fissure
- Chemical Denervation of Anal Muscle
CPT Codes:
- 46505: Chemodenervation of internal anal sphincter
Does Dr. Greenwald accept my insurance?
Dr. Greenwald accepts most major insurance plans. Important: Please call our office at (516) 482-8657 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Greenwald accept in Great Neck, NY?
Dr. Greenwald in Great Neck, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Cigna Group
Corporate Services
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Medicaid
Medicare
Service Employees International Union (SEIU)
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Greenwald's office located?
What is Dr. Greenwald's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Greenwald's National Provider Identifier (NPI) number is 1174618557.
What common questions do patients ask about Dr. Greenwald?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Greenwald
What is Dr. Marc Greenwald's specialty?
Dr. Greenwald is a Colon & Rectal Surgeon (Proctologist) near Great Neck, NY.
What does a Colon & Rectal Surgeon (Proctologist) do?
A colon and rectal surgeon possesses the expertise to diagnose and treat a variety of ailments affecting the intestinal tract, including the colon, rectum, anal canal, and perianal area, through both medical and surgical interventions. Furthermore, this professional also engages with other organs and tissues, including the liver, urinary system, and female reproductive system, that are relevant to primary intestinal disorders.
Is this Dr. Marc Greenwald affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Greenwald is affiliated with North Shore University Hospital which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Colon & Rectal Surgeon (Proctologist)?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Colon & Rectal Surgeon (Proctologist). Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Marc Greenwald accepting new patients in Great Neck, NY?
Yes, Dr. Marc Greenwald is accepting new patients at this time.
Does Dr. Marc Greenwald offer online booking?
Please contact Dr. Greenwald's office at (516) 482-8657 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Marc Greenwald?
Please contact Dr. Greenwald's office at (516) 482-8657 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Marc Greenwald have?
Dr. Marc Greenwald is certified by the American Board of Colon & Rectal Surgery and American Board of Surgery.
<section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>