Dr. Michael John Abunassar – Gastroenterologist | Gatineau, QC

Dr. Michael John Abunassar 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 Polyclinique 819 in Gatineau, QC, he is a key member of the local medical community. His practice adheres to the high standards set by the Collège des médecins du Québec (CMQ), ensuring that patients receive care that is both safe and effective. Dr. Abunassar 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 to achieve accurate diagnoses and effective treatments.

He holds a Medical Degree from a recognized institution and has accumulated over 6 years of experience as a Gastroenterologist since 2018. With extensive post-graduate training, he has obtained the necessary certifications to practice Gastroenterology (Comprehensive Care for Digestive System Disorders) in QC. His professional development is continuously reinforced by participation in relevant medical education and adherence to the latest clinical guidelines.

Dr. Abunassar's clinical philosophy centers on evidence-based digestive health care, patient education on gastrointestinal conditions and lifestyle modifications, early and precise diagnosis through advanced procedures, and the formulation of personalized treatment plans. His dedication to his patients in Gatineau is reflected in his compassionate approach, ensuring that each patient is supported throughout their healthcare journey. Fluent in French, he is committed to providing accessible and empathetic communication tailored to his patients' needs.

Dr. Michael John Abunassar diagnoses and treats a wide range of digestive system disorders, including:

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.
• Chronic Idiopathic Constipation (CIC) & Opioid-Induced Constipation (OIC): Persistent constipation that does not have an identifiable underlying cause (CIC) or is a side effect of opioid medications (OIC).

Esophageal, Stomach & Upper GI Disorders

• Dysphagia (Difficulty Swallowing) & Odynophagia (Painful Swallowing): Symptoms requiring investigation to determine underlying causes, which can range from structural abnormalities and motility disorders to inflammatory conditions or tumors.
• 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.

Inflammatory Bowel Disease (IBD) Focus

• Crohn's Disease (Ileal, Colonic, Ileocolonic, Perianal): A chronic inflammatory condition that can affect any part of the digestive tract from mouth to anus, causing transmural (full-thickness) inflammation, pain, diarrhea, weight loss, and potential complications like strictures or fistulas.
• Indeterminate Colitis & IBD-Unclassified (IBD-U): Cases of IBD, particularly early in the disease course, where it is difficult to definitively distinguish between Crohn's disease and ulcerative colitis based on clinical, endoscopic, and histological features.

This list is not exhaustive. For personalized advice regarding your specific digestive condition, please consult with Dr. Michael John Abunassar.

• 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.
• Interpretation & Correlation of Advanced Digestive Health Diagnostic Tests: Expert analysis and clinical correlation of results from endoscopies, biopsies, imaging studies (CT, MRI, MRCP, ultrasound), breath tests (e.g., for H. pylori, SIBO, lactose intolerance), stool tests (e.g., calprotectin, FIT), motility studies, and genetic testing for GI conditions.
• Comprehensive Gastroenterology Consultation & Digestive Health Assessment: In-depth assessment of digestive system disorders, including detailed review of medical history, family history, lifestyle factors, physical examination, symptom analysis, and development of a personalized diagnostic and treatment strategy.
• Endoscopic Hemostasis for Acute & Chronic GI Bleeding: Various endoscopic techniques (e.g., injection therapy, thermal coagulation/APC, mechanical clips, hemostatic sprays) used to stop acute or recurrent bleeding from ulcers, varices, angiodysplasias, or tumors in the GI tract.
• Second Opinion Consultations for Complex Digestive Diseases: Providing expert second opinions on challenging or rare gastrointestinal diagnoses, unclear test results, and proposed complex treatment plans, including for IBD, liver disease, and pancreatic disorders.
• 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.
• 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.

Note: This list provides a general overview. Specific procedures and treatments are determined after a thorough evaluation. Discuss with Dr. Abunassar 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.

Polyclinique 819 is situated in Gatineau's Gatineau Sector Central (Mont-Luc, Tecumseh) neighborhood, serving as a key medical facility within a larger hospital complex. The clinic is conveniently located near the Casino du Lac-Leamy, with accessible public transit options including the Société de transport de l'Outaouais (STO) (which includes the Rapibus BRT). The facility is wheelchair accessible, ensuring ease of access for all patients. Paid parking options are conveniently located nearby, providing ease of visitations for patients and visitors alike. The clinic's central location makes it an ideal choice for those seeking specialized digestive health care in the Gatineau area.

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

Medically necessary consultations with a licensed Gastroenterologist like Dr. Abunassar, 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. Abunassar'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. Abunassar, 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. Abunassar 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.

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

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. Abunassar or the anesthesia provider beforehand. Because of the sedation, you will need to have someone accompany you to drive you home after the procedure.

Are there significant risks associated with procedures like gastroscopy or colonoscopy?

Gastroscopy (upper endoscopy) and colonoscopy are generally very safe procedures, especially when performed by an experienced Gastroenterologist like Dr. Abunassar. Complications are uncommon. Potential risks can include bleeding, particularly if polyps are removed or biopsies are taken; perforation (a tear in the wall of the digestive tract); infection (rare); or adverse reactions to the sedative medication used. Before your procedure, Dr. Abunassar will thoroughly discuss the specific potential risks and benefits based on your individual health and the reason for the procedure, allowing you to make an informed decision.

What's the difference between Irritable Bowel Syndrome (IBS) and Inflammatory Bowel Disease (IBD)? Can Dr. Abunassar diagnose and treat both?

Yes, a Gastroenterologist like Dr. Abunassar can diagnose and treat both IBS and IBD, but they are very different conditions. IBD, which includes Crohn's disease and ulcerative colitis, is characterized by chronic inflammation and physical damage (like ulcers and strictures) to the digestive tract, visible during endoscopy and on biopsies. It's an autoimmune-related condition. IBS, on the other hand, is a functional gut disorder, meaning the GI tract doesn't work correctly, but there's no visible inflammation or damage on standard tests. IBS causes symptoms like abdominal pain, bloating, and altered bowel habits. While IBS can significantly impact quality of life, it doesn't cause the destructive inflammation seen in IBD. Diagnosis involves different criteria and investigations for each.

Polyclinique 819
130-444 boul de L’hôpital
Gatineau, QC J8T 7X6

Phone: (819) 282-7095 | Fax: (819) 243-7081

The facility is wheelchair accessible.

Dr. Abunassar 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. Abunassar 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=18079