Dr. Simon Lessard – Gastroenterologist | Châteauguay, QC

Dr. Simon Lessard is a dedicated Gastroenterologist specializing in the diagnosis and treatment of a wide array of disorders affecting the digestive system in adult patients, and may also see older adolescents for certain conditions. Practicing at Hôpital Anna-Laberge in Châteauguay, QC, he is a key member of the local medical community. He provides comprehensive care for a wide range of digestive system disorders, including conditions affecting the esophagus, stomach, intestines, liver, and pancreas, utilizing diagnostic and therapeutic endoscopy. His approach emphasizes patient-centered care, ensuring each individual receives tailored assessments and treatments to optimize their digestive health in a supportive environment.

Dr. Lessard holds a Medical Degree from a recognized institution and has accumulated over 8 years of experience practicing as a Gastroenterologist since 2016. He has completed extensive post-graduate training and holds the necessary certifications to practice Gastroenterology (Comprehensive Care for Digestive System Disorders) in QC, including licensure through the Collège des médecins du Québec (CMQ), license number 13649. His commitment to continuous professional development ensures that he stays current with the latest advances in digestive health care and endoscopic techniques.

With a strong philosophy rooted in evidence-based medicine, Dr. Lessard is dedicated to providing thorough patient education about gastrointestinal conditions and lifestyle modifications that can improve quality of life. He emphasizes early and accurate diagnosis through advanced diagnostic procedures and offers personalized treatment plans tailored to each patient's needs. Fluent in French, he is committed to serving the Châteauguay community with compassionate and comprehensive digestive healthcare, fostering trust and collaboration with his patients.

Dr. Simon Lessard diagnoses and treats a wide range of digestive system disorders, including:

Liver, Gallbladder, Bile Duct & Pancreatic Disorders

• Pancreatitis (Acute Recurrent & Chronic): Inflammation of the pancreas that can be sudden and severe (acute), recurrent, or long-lasting (chronic), causing significant abdominal pain and digestive enzyme deficiencies.
• Cirrhosis & Management of Its Complications (Ascites, Varices, Encephalopathy): Advanced stage of liver scarring (fibrosis) impairing liver function, leading to complications such as fluid accumulation in the abdomen (ascites), enlarged veins that can bleed (varices), and brain dysfunction (hepatic encephalopathy).

Esophageal, Stomach & Upper GI Disorders

• Barrett's Esophagus & Dysplasia Monitoring: A precancerous condition in which the normal lining of the esophagus is replaced with tissue similar to the intestinal lining, often due to chronic GERD, requiring regular surveillance for dysplasia (abnormal cells).
• Hiatal Hernia & Paraesophageal Hernia: Condition where part of the stomach pushes upward through an opening (hiatus) in the diaphragm into the chest, potentially contributing to GERD and other symptoms.
• Eosinophilic Esophagitis (EoE): A chronic immune system disease characterized by a buildup of eosinophils (a type of white blood cell) in the esophagus, causing inflammation, difficulty swallowing, food impaction, and chest pain.

Functional Gastrointestinal & Motility Disorders

• Pelvic Floor Dysfunction & Anorectal Disorders (e.g., Dyssynergic Defecation): Inability to correctly relax and coordinate pelvic floor muscles to facilitate a normal bowel movement, often requiring specialized testing like anorectal manometry and biofeedback therapy.
• Rumination Syndrome: A condition in which people repeatedly and unintentionally spit up (regurgitate) undigested or partially digested food from the stomach, rechew it, and then reswallow it or spit it out.
• Functional Dyspepsia & Epigastric Pain Syndrome: Persistent or recurrent pain or discomfort centered in the upper abdomen (dyspepsia) or specifically in the epigastric region, without an identifiable structural cause after investigation.

This list is not exhaustive. For personalized advice regarding your specific digestive condition, please consult with Dr. Simon Lessard.

• Management of Functional Dyspepsia & Functional Abdominal Pain Syndrome: Diagnosis and management of chronic upper abdominal pain or discomfort (dyspepsia) or generalized abdominal pain without an identifiable structural cause, often involving lifestyle, dietary, and neuromodulator therapies.
• ERCP (Endoscopic Retrograde Cholangiopancreatography) - Diagnostic & Therapeutic: Specialized procedure combining upper endoscopy and X-rays to diagnose and treat problems of the bile and pancreatic ducts, such as gallstone removal from bile duct, stent placement for strictures or leaks, and sphincterotomy.
• Endoscopic Ultrasound (EUS) with Fine Needle Aspiration/Biopsy (FNA/FNB): Procedure combining endoscopy with ultrasound to obtain high-resolution images and tissue samples (FNA/FNB) of the digestive tract wall, surrounding organs (pancreas, liver, adrenal glands, gallbladder), and lymph nodes for staging cancers or diagnosing lesions.
• Irritable Bowel Syndrome (IBS) Comprehensive Diagnosis & Management (including subtypes IBS-D, IBS-C, IBS-M): Multifaceted approach to managing IBS symptoms (abdominal pain, bloating, diarrhea, constipation, mixed pattern) including thorough exclusion of other conditions, dietary modifications (e.g., low FODMAP diet), lifestyle changes, stress management, and targeted medications.
• Upper Endoscopy (EGD - Esophagogastroduodenoscopy) with Biopsy & Interventions: Diagnostic and therapeutic procedure to examine the esophagus, stomach, and duodenum using a flexible tube with a camera. Allows for targeted biopsies, polyp removal (polypectomy), dilation of strictures, control of bleeding (hemostasis), and foreign body removal.
• Personalized Nutritional Assessment & Medical Dietary Therapy for GI Conditions: Evaluation of nutritional status and provision of evidence-based dietary advice and medical nutrition therapy tailored to specific gastrointestinal disorders like IBD, IBS, celiac disease, eosinophilic esophagitis, gastroparesis, or food intolerances, often in collaboration with registered dietitians.
• Endoscopic Dilation of Gastrointestinal Strictures (Esophageal, Pyloric, Colonic): Procedure to stretch narrowed areas (strictures) in the esophagus (e.g., due to reflux, EoE), stomach outlet (pylorus), small intestine, or colon using balloons or Savary-Gilliard dilators passed through an endoscope.

Note: This list provides a general overview. Specific procedures and treatments are determined after a thorough evaluation. Discuss with Dr. Lessard for care relevant to your specific condition.

All medical and surgical services (if applicable) are provided in accordance with the standards of practice set by the Collège des médecins du Québec (CMQ) and relevant gastroenterological care guidelines. Contact the clinic or your referring physician regarding new patient intake and referral processes.

Hôpital Anna-Laberge is situated in the areas near central Châteauguay, QC, serving as a key medical facility within the region. The hospital is conveniently accessible via local public transit, with parking available at or near the facility. The hospital's specialized units, including the gastroenterology department where Dr. Lessard practices, are located within a modern, wheelchair-accessible building. The hospital's central location near local points of interest makes it an integral part of the community's healthcare infrastructure, providing vital services to residents in Châteauguay and surrounding areas.

Are consultations and procedures like endoscopies with Dr. Lessard, a Gastroenterologist, covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations with a licensed Gastroenterologist like Dr. Lessard, as well as most diagnostic procedures (e.g., endoscopies for investigating symptoms, biopsies for medical reasons) and treatments for provincially insured digestive conditions (e.g., IBD, celiac disease, screening colonoscopies as per provincial guidelines, liver disease management), are generally covered by Régie de l'assurance maladie du Québec (RAMQ) in QC when a referral from a family doctor or another specialist is in place. Procedures considered purely for screening outside of guidelines, or for non-medical reasons, and some advanced technologies or specific drug therapies might have different coverage. It's crucial to discuss coverage specifics for any proposed treatment or procedure with Dr. Lessard's office, the hospital/clinic's financial services, or Régie de l'assurance maladie du Québec (RAMQ) beforehand.

Do I need a referral from my family doctor to see Dr. Lessard, a Gastroenterologist?

Yes, in nearly all cases, a referral from your family physician or another specialist (such as an internist or surgeon) is required to schedule an appointment with a Gastroenterologist like Dr. Lessard for services covered by the provincial health plan. Gastroenterological issues often require initial assessment and preliminary investigations by your primary care provider. The referral ensures that a specialist consultation is appropriate, helps with prioritizing appointments, and facilitates coordinated care, including the transfer of relevant medical information.

How does a Gastroenterologist like Dr. Lessard approach the management of Inflammatory Bowel Disease (IBD)?

The management of IBD (Crohn's disease and ulcerative colitis) by a Gastroenterologist like Dr. Lessard is a highly individualized and long-term process. The primary goals are to induce and then maintain remission (control inflammation), alleviate symptoms, prevent complications, and improve the patient's overall quality of life. Treatment strategies often involve a combination of medications, which can include aminosalicylates (5-ASAs), corticosteroids (for acute flare-ups), immunomodulators (e.g., azathioprine, methotrexate), and increasingly, biologic therapies or small molecule drugs that target specific inflammatory pathways. Regular monitoring through clinical assessment, blood tests, stool tests (like fecal calprotectin), and endoscopic procedures is crucial to track disease activity and adjust treatment as needed. Nutritional counseling and lifestyle advice are also integral parts of comprehensive IBD care.

Will I be asleep for my endoscopy or colonoscopy with Dr. Lessard?

For most endoscopic procedures like upper endoscopy (gastroscopy) and colonoscopy, patients are typically given sedation to help them relax and be comfortable. This is often called 'conscious sedation' or 'moderate sedation,' meaning you'll be drowsy and may not remember much of the procedure, but you won't be under general anesthesia (completely unconscious with a breathing tube). The specific type and level of sedation can vary and will be discussed with you by Dr. Lessard or the anesthesia provider beforehand. Because of the sedation, you will need to have someone accompany you to drive you home after the procedure.

What is generally involved in preparing for a colonoscopy procedure?

Preparing for a colonoscopy is a critical step to ensure the procedure is effective and safe. Dr. Lessard's office will provide very specific instructions, which must be followed closely. Typically, preparation involves dietary changes for a few days beforehand (e.g., low-residue diet), followed by a clear liquid diet for the 24 hours prior to the exam. The most important part is the bowel cleansing process, which involves drinking a prescribed laxative solution designed to completely empty and clean your colon. This usually starts the evening before and may continue the morning of the procedure. You'll also need to arrange for transportation home, as sedation is commonly used.

Hôpital Anna-Laberge
200 boul Brisebois
Châteauguay, QC J6K 4W8

Phone: (450) 699-2425 | Fax: (450) 699-2515

The facility is wheelchair accessible.

Dr. Lessard is a licensed Gastroenterologist regulated by the Collège des médecins du Québec (CMQ) under the Medical Act in QC. A referral from a family physician or appropriate specialist is typically required for consultations with Dr. Lessard for services covered by the provincial health plan.

Verify registration with the Collège des médecins du Québec (CMQ): https://www.cmq.org/en/directory/physicians?number=13649