37 Years of Experience
Accepting patients
Online booking
Telehealth
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Sloyer, Gastroenterologist in Great Neck, NY?
Dr. Alan Sloyer, MD is a Gastroenterologist, who primarily practices in Great Neck, NY with 1 additional practice location. He has been practicing for over 37 years and is board certified. Dr. Sloyer graduated from State University of New York Downstate Medical Center College of Medicine and completed his residency at Mem Sloan-Kettering Cancer Ctr, Gastroenterology; North Shore Univ Hosp, Internal Medicine. He is a member of the phi beta kappa, alpha omega alpha, american college of gastroenterology, american college of physici. Dr. Sloyer is fluent in English and Hebrew, and is currently seeing new patients. Dr. Sloyer’s practice accepts Medicare, UnitedHealthcare, Cigna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Sloyer’s office at (516) 487-2444.
What are Areas of Expertise for Dr. Sloyer?
Dr. Alan Sloyer, MD is a highly-rated, board-certified Gastroenterologist known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Sloyer empowers patients to confidently navigate their health journey, specializing in Colon & Rectal Cancer Detection, Colonoscopy, Endoscopy, Inflammatory Bowel Disease, Irritable Bowel Syndrome, or comprehensive wellness support. Serving the Great Neck/NY community, Dr. Sloyer is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Sloyer go to medical school and complete their residency?
Fellowship: Memorial Sloan-Kettering Cancer Center
Residency: Mem Sloan-Kettering Cancer Ctr, Gastroenterology; North Shore Univ Hosp, Internal Medicine | North Shore University Hospital | NSUH - Manhasset | Memorial Sloan-Kettering Cancer Center | Memorial Sloan-Kettering Cancer Center
Medical School: Suny-Hlth Sci Ctr At Brooklyn, Coll of Med, Brooklyn Ny | SUNY Downstate Medical Center College Of Medicine | State University of New York Downstate Medical Center College of Medicine
Is Dr. Sloyer board certified as a Gastroenterologist?
Yes, Dr. Alan Sloyer, MD is board certified by the American Board of Internal Medicine , American Board of Internal Medicine since 1987
What languages does Dr. Sloyer speak?
Dr. Sloyer and their clinical team can communicate with patients in the following languages:
English
Hebrew
What conditions does Dr. Sloyer treat?
As a Gastroenterologist, Dr. Sloyer 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. Sloyer. 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.
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:
- Fatty Liver Disease
- Liver Disease
- Nonalcoholic Fatty Liver Disease (NAFLD) & NASH
- Nonalcoholic Fatty Liver Disease & NASH in Children
- NAFLD
- NASH
- Hepatic steatosis
ICD-10 Codes:
- K760: Fatty (change of) liver, not elsewhere classified
Also known as:
- Acid Reflux
- GERD
- Acid Reflux (GER & GERD) in Adults
- Acid Reflux (GER & GERD) in Children
- Acid Reflux (GER & GERD) in Infants
- Gastroesophageal Reflux
- Heartburn
- Indigestion
ICD-10 Codes:
- K219: Gastro-esophageal reflux disease without esophagitis
Also known as:
- Family History of Digestive Organ Cancer
- Cancer
- Family History
- Genetic risk for gastrointestinal cancer
- Family history of GI cancer
- Hereditary digestive cancer
ICD-10 Codes:
- Z800: Family history of malignant neoplasm of digestive organs
Also known as:
- Stomach Inflammation
- Stomach Disorder
- Gastritis & Gastropathy
- Gastritis
- Inflamed stomach lining
- Stomach lining inflammation
ICD-10 Codes:
- K2970: Gastritis, unspecified, without bleeding
Also known as:
- Other Digestive Symptoms
- Digestive Disease
- Unspecified Abdominal Symptoms
- Other Belly Problems
- Digestive System Issues
ICD-10 Codes:
- R198: Other specified symptoms and signs involving the digestive system and abdomen
Also known as:
- Constipation
- Difficulty Passing Stool
- Infrequent Bowel Movements
- Hard Stools
ICD-10 Codes:
- K5900: Constipation, unspecified
What procedures does Dr. Sloyer perform?
As a Gastroenterologist, Dr. Sloyer 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. Sloyer. 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.
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:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Does Dr. Sloyer accept my insurance?
Dr. Sloyer accepts most major insurance plans. Important: Please call our office at (516) 487-2444 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Sloyer accept in Great Neck, NY?
Dr. Sloyer 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
Crown Cork and Seal Company
Department of Veterans Affairs
HealthComp
Healthfirst
MagnaCare Rx
Medicare
Service Employees International Union (SEIU)
State of Tennessee
UnitedHealthcare
View All Insurances
Where is Dr. Sloyer's office located?
Dr. Alan Sloyer also offers virtual visits
Dr. Alan Sloyer's Primary Practice
233 E Shore Rd Ste 101
Great Neck, NY 11023
(516) 487-2444
Would you like to schedule an appointment with Dr. Alan Sloyer?
Dr. Sloyer has appointments available at his Great Neck, NY office, as well as 1 other location. Please select a location, date, and time below.
Recognitions
Memberships & Associations
phi beta kappa, alpha omega alpha, american college of gastroenterology, american college of physici
Member
Castle Connolly Doctor’s Choice Awards
Doctor’s Choice - 2025
Among the most nominated for the Castle Connolly Top Doctor recognition in 2025
What is Dr. Sloyer's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Sloyer's National Provider Identifier (NPI) number is 1073535050.
What common questions do patients ask about Dr. Sloyer?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Sloyer
What is Dr. Alan Sloyer's specialty?
Dr. Sloyer is a Gastroenterologist near Great Neck, NY. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Sloyer to book an appointment today.
Is this Dr. Alan Sloyer affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Sloyer is affiliated with North Shore University Hospital, St. Francis Hospital & Heart Center which are a Castle Connolly Top Hospitals. 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
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with 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 Alan Sloyer accepting new patients in Great Neck, NY?
Yes, Dr. Alan Sloyer is accepting new patients at this time.
Does Dr. Alan Sloyer offer online booking?
Yes, you can use online booking to schedule an appointment with Dr. Sloyer, or call (516) 487-2444 for more information.
How can I make an appointment with Alan Sloyer?
Yes, Dr. Sloyer offers telehealth appointments. You can use online booking to schedule a telehealth appointment with Dr. Sloyer, or call (516) 487-2444 for more information.
Which board certifications does Dr. Alan Sloyer have?
Dr. Alan Sloyer is certified by the American Board of Internal Medicine.
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