JD
41 Years of Experience
Accepting patients
Who is Dr. Duva, Gastroenterologist in Riverhead, NY?
Dr. Joseph Duva, MD is a Gastroenterologist, who primarily practices in Riverhead, NY. He has been practicing for over 41 years and is board certified. Dr. Duva completed his residency at Nassau Co Med Ctr, Gastroenterology; Nassau Co Med Ctr, Internal Medicine. Dr. Duva is fluent in English, and is currently seeing new patients. Dr. Duva’s practice accepts Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Duva’s office.
What are Areas of Expertise for Dr. Duva?
Dr. Joseph Duva, MD is a highly-rated, board-certified Gastroenterologist 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. Duva empowers patients to confidently navigate their health journey, specializing in Colonoscopy & Polypectomy, Endoscopy & Colonoscopy, Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome, Liver Disease, and comprehensive wellness support. Serving the Riverhead, NY community, Dr. Duva is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Duva go to medical school and complete their residency?
Residency: Nassau Co Med Ctr, Gastroenterology; Nassau Co Med Ctr, Internal Medicine
Medical School: Mt Sinai Sch of Med of The City Univ of Ny, New York Ny
Is Dr. Duva board certified as a Gastroenterologist?
Yes, Dr. Joseph Duva, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Duva speak?
Dr. Duva and their clinical team can communicate with patients in the following languages:
English
What conditions does a Gastroenterologist like Dr. Duva typically treat?
As a Gastroenterologist, Dr. Duva 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. Duva. 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.
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:
- 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:
- Hemorrhoids
- Piles
- Swollen Veins in Anus
- Anal Lumps
ICD-10 Codes:
- K649: Unspecified hemorrhoids
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal Polyps
- Intestinal Polyps
- Bowel Polyps
ICD-10 Codes:
- Z86010: Personal history of colon polyps
What procedures does a Gastroenterologist like Dr. Duva typically perform?
As a Gastroenterologist, Dr. Duva 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. Duva. 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.
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
- Flexible Colonoscopy with Biopsy
- Colorectal Polyp Removal
- Hot Biopsy Colonoscopy
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
- 45384: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by hot biopsy forceps
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. Duva accept my insurance?
Dr. Duva accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Duva accept in Riverhead, NY?
Dr. Duva in Riverhead, 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
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
MagnaCare Rx Administered Payer
Medicare
National Benefit Fund
Service Employees International Union (SEIU)
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Duva's office located?
What is Dr. Duva's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Duva's National Provider Identifier (NPI) number is 1992817977.
What common questions do patients ask about Dr. Duva?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Duva
What is Dr. Joseph Duva's specialty?
Dr. Duva is a Gastroenterologist near Riverhead, NY.
What does a Gastroenterologist do?
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.
Is this Dr. Joseph Duva affiliated with a ranked Castle Connolly Top Hospital?
No, Duva is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Stony Brook Eastern Long Island Hospital. Castle Connolly Top Hospitals 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 Gastroenterologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Gastroenterologist. 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 Joseph Duva accepting new patients in Riverhead, NY?
Yes, Dr. Joseph Duva is accepting new patients at this time.
Does Dr. Joseph Duva offer online booking?
Please contact Dr. Duva's office for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Joseph Duva?
Please contact Dr. Duva's office for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Joseph Duva have?
Dr. Joseph Duva is certified by the American Board of Internal Medicine.
Other Gastroenterologist Near Riverhead, NY

Dr. Preeti Mehta, MD is a Gastroenterologist, who primarily practices in Riverhead, NY with 2 additional practice locations. She is board certified.
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Dr. Kevin Yeroushalmi, MD is a Gastroenterologist, who primarily practices in Bay Shore, NY with 2 additional practice locations.
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Dr. Dhiren Mehta, MD is a Gastroenterologist, who primarily practices in East Moriches, NY with 2 additional practice locations. He has been practicing for over 36 years and is board certified.
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Connect with DR. Duva
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887 Old Country Road, Suite A
Riverhead, NY 11901