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Dr. Lionel D'souza, MD

Dr. Lionel D'souza, MD

New York, NY

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. D'souza, Gastroenterologist in New York, NY?

    As an interventional gastroenterologist, my expertise is in helping people with various diseases of the pancreas and the bile duct and those with benign and cancerous tumors of the gastrointestinal (GI) tract. Advances in technology have greatly expanded our ability to endoscopically address these, and various other GI diseases. My specific interest is in endoscopic surgery which includes minimally-invasive techniques that do not leave external scars and are often outpatient procedures. This includes removing large benign and precancerous tumors and, in some cases, the removal of early cancers of the GI tract. I also offer minimally-invasive options for certain motility disorders of the esophagus and stomach.

    What are Areas of Expertise for Dr. D'souza?

    Dr. Lionel D'souza, 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. D'souza empowers patients to confidently navigate their health journey, specializing in Achalasia, Endoscopic Mucosal Resection, Endoscopic Submucosal Dissection, Endoscopic Ultrasound, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Cancer, Pancreatic & Biliary Disease, Pancreatic/Biliary Endoscopy (ERCP), or comprehensive wellness support. Serving the New York/NY community, Dr. D'souza is dedicated to enhancing lives through expert, patient-centered care.

    Where did Dr. D'souza go to medical school and complete their residency?

    • Medical School: Kasturba Medical College Mangalore

    What languages does Dr. D'souza speak?

    Dr. D'souza and their clinical team can communicate with patients in the following languages:

    • English

    What conditions does Dr. D'souza treat?

    As a Gastroenterologist, Dr. D'souza 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. D'souza. 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:

    • Other Specific Pancreatic Disease
    • Pancreatic Cyst
    • Pancreatic Disease
    • Miscellaneous Pancreas Disorders
    • Named Pancreatic Conditions
    • Other Defined Pancreas Problems
    • Cyst on Pancreas
    • Pancreatic Pseudocyst
    • Fluid Sac on Pancreas

    ICD-10 Codes:

    • K8689: Other specified diseases of pancreas
    • K862: Cyst of pancreas

    Also known as:

    • Obstructed Bile Duct Stones
    • Bile Duct Stones
    • Gallstones
    • Blocked bile duct stones
    • Obstructive choledocholithiasis
    • Choledocholithiasis
    • Biliary duct calculi

    ICD-10 Codes:

    • K8051: Calculus of bile duct without cholangitis or cholecystitis with obstruction
    • K8050: Calculus of bile duct without cholangitis or cholecystitis without obstruction

    Also known as:

    • Achalasia
    • Esophagus Disorder
    • Esophageal Achalasia
    • Cardia Achalasia
    • Difficulty Swallowing

    ICD-10 Codes:

    • K220: Achalasia of cardia

    Also known as:

    • Blocked Bile Duct
    • Bile Duct Disease
    • Biliary Obstruction
    • Bile Duct Blockage
    • Obstructed Bile Duct

    ICD-10 Codes:

    • K831: Obstruction of bile duct

    Also known as:

    • Stomach and Duodenum Disorder
    • Stomach Disorder
    • Gastric Conditions
    • Duodenal Conditions
    • Digestive System Disorders

    ICD-10 Codes:

    • K3189: Other diseases of stomach and duodenum

    What procedures does Dr. D'souza perform?

    As a Gastroenterologist, Dr. D'souza 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. D'souza. 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:

    • ERCP with Sphincterotomy
    • ERCP with Stent Placement
    • ERCP for Bile/Pancreatic Stent Exchange
    • ERCP with Bile or Pancreatic Duct Stent Removal
    • Endoscopic retrograde cholangiopancreatography
    • Bile duct scope
    • Pancreatic duct scope
    • Papillotomy
    • Endoscopic Retrograde Cholangiopancreatography with Stent
    • Bile Duct Stent Placement via ERCP
    • Pancreatic Duct Stent Placement via ERCP
    • Bile duct stent replacement (ERCP)
    • Endoscopic retrograde cholangiopancreatography with stent exchange
    • Biliary stent removal and replacement
    • Pancreatic duct stent exchange
    • Endoscopic Retrograde Cholangiopancreatography
    • Bile Duct Stent Removal
    • Pancreatic Duct Foreign Body Removal
    • ERCP Stone Removal

    CPT Codes:

    • 43262: Endoscopic retrograde cholangiopancreatography (ERCP); with sphincterotomy/papillotomy
    • 43274: Endoscopic retrograde cholangiopancreatography (ERCP); with placement of endoscopic stent into biliary or pancreatic duct, including pre- and post-dilation and guide wire passage, when performed, including sphincterotomy, when performed, each stent
    • 43276: Endoscopic retrograde cholangiopancreatography (ERCP); with removal and exchange of stent(s), biliary or pancreatic duct, including pre- and post-dilation and guide wire passage, when performed, including sphincterotomy, when performed, each stent exchanged
    • 43275: Endoscopic retrograde cholangiopancreatography (ERCP); with removal of foreign body(s) or stent(s) from biliary/pancreatic duct(s)

    Also known as:

    • Upper Endoscopy with Ultrasound (EUS)
    • Upper Endoscopy with Stomach/Duodenum Dilation
    • Upper Endoscopy with Polyp Removal
    • EGD with endoscopic ultrasound
    • Esophageal ultrasound
    • Stomach ultrasound endoscopy
    • Duodenal ultrasound endoscopy
    • EGD with Dilation
    • Esophageal Dilation
    • Stomach Stricture Widening
    • Duodenal Stricture Repair
    • EGD with Polypectomy
    • Esophagus, Stomach, Duodenum Scope with Removal
    • Flexible Endoscopy Tumor Excision

    CPT Codes:

    • 43259: Esophagogastroduodenoscopy, flexible, transoral; with endoscopic ultrasound examination, including the esophagus, stomach, and either the duodenum or a surgically altered stomach where the jejunum is examined distal to the anastomosis
    • 43245: Esophagogastroduodenoscopy, flexible, transoral; with dilation of gastric/duodenal stricture(s) (eg, balloon, bougie)
    • 43251: Esophagogastroduodenoscopy, flexible, transoral; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique

    Also known as:

    • EGD with Endoscopic Ultrasound
    • Diagnostic Upper Endoscopy with Biopsy
    • Upper Endoscopy with Mucosal Resection
    • EGD with Esophageal Balloon Dilation
    • Upper Endoscopy with Injections
    • Upper GI Endoscopy with Ultrasound
    • EUS (Endoscopic Ultrasound)
    • Esophagus, Stomach, Duodenum Ultrasound
    • EGD with Biopsy
    • Esophagogastroduodenoscopy
    • Upper GI Endoscopy
    • Stomach Scope with Sample
    • EGD with Mucosal Resection
    • Endoscopic Removal of Esophageal Lesion
    • Flexible Endoscopy with Tissue Removal
    • Upper Endoscopy with Esophageal Dilation
    • Flexible Esophagoscopy with Balloon
    • EGD with Balloon Widening
    • EGD with Submucosal Injections
    • Esophagogastroduodenoscopy with Injections
    • Stomach Scope with Medication

    CPT Codes:

    • 43237: Esophagogastroduodenoscopy, flexible, transoral; with endoscopic ultrasound examination limited to the esophagus, stomach or duodenum, and adjacent structures
    • 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
    • 43254: Esophagogastroduodenoscopy, flexible, transoral; with endoscopic mucosal resection
    • 43249: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic balloon dilation of esophagus (less than 30 mm diameter)
    • 43236: Esophagogastroduodenoscopy, flexible, transoral; with directed submucosal injection(s), any substance

    Also known as:

    • ERCP with Gallstone Removal
    • ERCP
    • Endoscopic Gallstone Removal
    • Biliary Duct Stone Removal
    • Pancreatic Duct Cleaning

    CPT Codes:

    • 43264: Endoscopic retrograde cholangiopancreatography (ERCP); with removal of calculi/debris from biliary/pancreatic duct(s)

    Also known as:

    • Colonoscopy with Polyp Removal
    • Colonoscopy with Tissue Removal
    • Colonoscopy with Biopsy
    • Colonoscopy
    • Colorectal Cancer Screening Tests
    • Flexible Colonoscopy with Polypectomy
    • Colon Polyp Removal
    • Colorectal Lesion Excision
    • Flexible colonoscopy with EMR
    • Endoscopic mucosal resection (colon)
    • Colon polyp removal during colonoscopy
    • Flexible Colonoscopy
    • Colon Biopsy
    • Large Intestine Scope
    • Colorectal Cancer Screening

    CPT Codes:

    • 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
    • 45390: Colonoscopy, flexible; with endoscopic mucosal resection
    • 45380: Colonoscopy, flexible; with biopsy, single or multiple

    Also known as:

    • Upper Endoscopy with Ultrasound and Biopsy
    • Biopsy
    • Endoscopy
    • Ultrasound
    • EGD with Endoscopic Ultrasound Biopsy
    • Transoral EUS-FNA
    • Esophagogastroduodenoscopy with Biopsy

    CPT Codes:

    • 43242: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic ultrasound-guided intramural or transmural fine needle aspiration/biopsy(s) (includes endoscopic ultrasound examination of the esophagus, stomach, and either the duodenum or a surgically altered stomach where the jejunum is examined distal to the anastomosis)

    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

    Also known as:

    • POEM Procedure (Esophageal Myotomy)
    • Peroral Endoscopic Myotomy
    • Esophageal Muscle Cutting
    • Achalasia Treatment
    • Transoral Esophageal Myotomy

    CPT Codes:

    • 43497: Lower esophageal myotomy, transoral (ie, peroral endoscopic myotomy [POEM])

    Also known as:

    • EGD with Pseudocyst Drainage
    • Endoscopic Pseudocyst Drainage
    • Transoral Pseudocyst Stent Placement
    • Pancreatic Pseudocyst Drainage (Endoscopic)
    • Stomach Cyst Drainage

    CPT Codes:

    • 43240: Esophagogastroduodenoscopy, flexible, transoral; with transmural drainage of pseudocyst (includes placement of transmural drainage catheter[s]/stent[s], when performed, and endoscopic ultrasound, when performed)

    Also known as:

    • Upper GI Endoscopy with Ultrasound Biopsy
    • Biopsy
    • Endoscopy
    • Ultrasound
    • EGD with EUS-FNA
    • Endoscopic Ultrasound Biopsy
    • Esophageal/Stomach Biopsy

    CPT Codes:

    • 43238: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic ultrasound-guided intramural or transmural fine needle aspiration/biopsy(s), (includes endoscopic ultrasound examination limited to the esophagus, stomach or duodenum, and adjacent structures)

    Also known as:

    • Endoscopic Tube Placement into Bile or Pancreatic Duct
    • ERCP Cannulation
    • Bile Duct Cannulation
    • Pancreatic Duct Access (Endoscopic)

    CPT Codes:

    • 43273: Endoscopic cannulation of papilla with direct visualization of pancreatic/common bile duct(s) (List separately in addition to code(s) for primary procedure)

    Also known as:

    • Upper GI Scope with Stent Placement
    • EGD with Stent
    • Esophageal Stent Placement
    • Stomach Stent Insertion

    CPT Codes:

    • 43266: Esophagogastroduodenoscopy, flexible, transoral; with placement of endoscopic stent (includes pre- and post-dilation and guide wire passage, when performed)

    Also known as:

    • Sigmoidoscopy with Stent Placement
    • Colorectal Cancer Screening Tests
    • Flexible Sigmoidoscopy with Stent
    • Lower Colon Stent Insertion
    • Rectal Stent Placement

    CPT Codes:

    • 45347: Sigmoidoscopy, flexible; with placement of endoscopic stent (includes pre- and post-dilation and guide wire passage, when performed)

    Also known as:

    • Upper Endoscopy for Foreign Body Removal
    • EGD for Foreign Body
    • Gastroscopy for Object Removal
    • Esophagogastroduodenoscopy for Foreign Body

    CPT Codes:

    • 43247: Esophagogastroduodenoscopy, flexible, transoral; with removal of foreign body(s)

    Also known as:

    • Esophageal Balloon Distension Study
    • Esophageal distension test
    • Balloon provocation test
    • Esophageal pain study

    CPT Codes:

    • 91040: Esophageal balloon distension study, diagnostic, with provocation when performed

    Does Dr. D'souza accept my insurance?

    Dr. D'souza 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. D'souza accept in New York, NY?

    Dr. D'souza in New York, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • ArcBest Corporation

    • Centene

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • EmblemHealth

    • Healthfirst

    • Medicare

    • State of New York

    • State of Tennessee

    • UnitedHealthcare

    View All Insurances

    Where is Dr. D'souza's office located?

    Mount Sinai Hospital

    5 East 98th Street

    New York, NY 10029

    Get Directions | View Website

    Q&A with Dr. Lionel D'souza, MD

    Q: What made you decide to pursue your specialty?

    A: Interventional gastrointestinal (GI) gives me the opportunity to be at the forefront of advancing technology and to continue to innovate how we help people with various GI diseases. Perhaps more importantly, my specialty often includes people with complex diseases, and cancers, that can significantly impact their quality of life or cause significant suffering. I find great fulfillment in caring for them and being able to offer minimally-invasive ways to alleviate symptoms and doing what I can to improve their quality of life.

    A: I direct the Center for Interventional Endoscopy at Stony Brook University Hospital which consists of a group of interventional gastroenterologists who are experts in this field. We accept referrals from gastroenterologists in the community and work closely with them to help care for their patients with complex gastrointestinal disorders. We have an excellent, well-trained staff who strive to provide people with the best possible experience as they navigate towards their treatment goals.

    What is Dr. D'souza's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. D'souza's National Provider Identifier (NPI) number is 1679733182.

    What common questions do patients ask about Dr. D'souza?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. D'souza

    What is Dr. Lionel D'souza's specialty?

    Dr. D'souza is a Gastroenterologist near New York, 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. D'souza to book an appointment today.

    Is this Dr. Lionel D'souza affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. D'souza is affiliated with The Mount Sinai 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

    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 Lionel D'souza accepting new patients in New York, NY?

    Yes, Dr. Lionel D'souza is accepting new patients at this time.

    Does Dr. Lionel D'souza offer online booking?

    Please contact Dr. D'souza's office for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Lionel D'souza?

    Please contact Dr. D'souza's office for information regarding telehealth appointment availability or for scheduling assistance.

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