Dr. Anissa Hayoun – Endocrinologist | Laval, QC

Dr. Anissa Hayoun, a Endocrinologist (Diabetes & Metabolism Focus), provides expert care for adult patients, and may also see older adolescents for certain endocrine conditions. With her practice located at Clinique BCL, Bureau in Laval, QC, she is an integral part of the local medical community. She adheres to the high standards set by the Collège des médecins du Québec (CMQ), ensuring quality and safety in her clinical practice. Her role primarily centers on the comprehensive management of type 1 and type 2 diabetes, metabolic syndrome, and lipid disorders, offering personalized treatment strategies to support each patient's health journey.

Dr. Hayoun holds a Medical Degree from a recognized institution and has accumulated over six years of specialized experience as an Endocrinologist (Diabetes & Metabolism Focus) since 2018. She has completed extensive postgraduate training and holds the necessary certifications to practice hormone and metabolism care in Quebec, demonstrating her commitment to ongoing professional development and excellence in her field.

Her clinical philosophy emphasizes evidence-based, patient-centered care. Dr. Hayoun is dedicated to patient education on managing chronic endocrine conditions, early and accurate diagnosis, and developing individualized treatment plans focused on long-term well-being. She speaks French fluently and is committed to supporting her patients in Laval with compassionate, comprehensive endocrine and metabolic health services.

Dr. Anissa Hayoun diagnoses and treats a wide range of hormonal and metabolic disorders, including:

Diabetes & Related Metabolic Disorders

• Prediabetes & Insulin Resistance: A state where blood glucose levels are higher than normal but not yet high enough for a type 2 diabetes diagnosis. Insulin resistance is a key feature, where cells don't respond well to insulin.
• Diabetes Complications (Neuropathy, Nephropathy, Retinopathy - endocrine management aspects): Management focused on glycemic, blood pressure, and lipid control to prevent or slow the progression of nerve damage, kidney disease, and eye damage associated with diabetes.

Thyroid & Parathyroid Gland Disorders

• Hypothyroidism (Underactive Thyroid - e.g., Hashimoto's Thyroiditis, Post-Ablation): A common condition where the thyroid gland doesn't produce enough thyroid hormone, leading to symptoms like fatigue, weight gain, cold intolerance, constipation, and dry skin.
• Thyroiditis (e.g., Subacute/De Quervain's, Postpartum, Silent/Painless): Inflammation of the thyroid gland, which can cause temporary hyperthyroidism followed by hypothyroidism, or persistent thyroid dysfunction, depending on the type.

Pituitary, Adrenal & Gonadal Axis Disorders

• Adrenal Nodules (Incidentalomas) & Adrenal Tumors (e.g., Pheochromocytoma, Aldosteronoma): Masses found on the adrenal glands, often discovered incidentally. Evaluation is needed to determine if they are hormonally active or potentially malignant.
• Male Hypogonadism (Primary & Secondary Testosterone Deficiency): Condition in which the body doesn't produce enough testosterone, leading to symptoms like low libido, fatigue, muscle loss, and infertility. Can be due to testicular failure or pituitary/hypothalamic issues.
• Adrenal Insufficiency (e.g., Addison's Disease, Secondary/Tertiary Adrenal Insufficiency): Condition where the adrenal glands do not produce sufficient amounts of steroid hormones, primarily cortisol and sometimes aldosterone, leading to a range of symptoms and potentially life-threatening adrenal crisis.

This list is not exhaustive. For personalized advice regarding your specific endocrine condition, please consult with Dr. Anissa Hayoun.

• Comprehensive Endocrine System Consultation & Hormonal Health Evaluation: In-depth clinical assessment of potential hormonal imbalances and disorders affecting the endocrine glands (e.g., thyroid, pituitary, adrenal, pancreas, parathyroid, gonads). Includes detailed medical history, family history review, targeted physical examination, analysis of symptoms, and formulation of a personalized diagnostic and management plan.
• Expert Second Opinion Consultations for Complex or Rare Endocrine Disorders: Providing specialized second opinions on challenging endocrine diagnoses, interpretation of ambiguous hormone test results, or evaluation of complex or multi-faceted treatment plans.
• Interpretation of Complex Hormonal Assays, Dynamic Endocrine Function Tests & Genetic Markers: Expert analysis and clinical correlation of specialized blood, urine, and saliva tests measuring various hormone levels. Includes interpretation of dynamic stimulation and suppression tests (e.g., ACTH stimulation, dexamethasone suppression, oral glucose tolerance test for acromegaly) to precisely evaluate endocrine gland function and identify genetic predispositions.
• Genetic Counseling Coordination & Testing for Hereditary Endocrine Neoplasia Syndromes & Familial Disorders: Risk assessment and coordination of genetic testing and counseling for individuals and families with suspected hereditary endocrine tumor syndromes (e.g., Multiple Endocrine Neoplasia - MEN1, MEN2; Von Hippel-Lindau), familial thyroid cancer, or other inherited endocrine conditions.
• Transitional Care for Young Adults with Chronic Endocrine Conditions: Facilitating the smooth transition of adolescents and young adults with lifelong endocrine disorders (e.g., Type 1 diabetes, congenital adrenal hyperplasia, hypopituitarism) from pediatric to adult endocrine care services.
• Inpatient & Outpatient Management of Endocrine Emergencies & Crises: Acute diagnosis and management of potentially life-threatening hormonal imbalances such as diabetic ketoacidosis (DKA), hyperglycemic hyperosmolar state (HHS), thyroid storm, myxedema coma, adrenal crisis, severe hypoglycemia, and acute hyper/hypocalcemia, typically initiated in an emergency or hospital setting with ongoing outpatient follow-up.

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

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

Clinique BCL, Bureau is situated in Laval's areas near central Laval, within the vibrant neighborhood surrounding Station de la Concorde (Metro/exo) and Parc des Prairies. The facility is easily accessible by public transit via the Société de transport de Laval (STL). The location is fully wheelchair accessible, ensuring ease of access for all patients. Parking is available at or near the facility for those arriving by car, providing convenience for patients attending appointments with Dr. Hayoun.

Are consultations, hormone tests, and treatments with Dr. Hayoun, an Endocrinologist (Diabetes & Metabolism Focus), covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations with a licensed Endocrinologist (Diabetes & Metabolism Focus) like Dr. Hayoun, most standard diagnostic hormone blood tests, dynamic endocrine function tests when indicated, and treatments for provincially insured endocrine conditions (e.g., diabetes, thyroid disorders, adrenal insufficiency, osteoporosis management as per guidelines) 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. Some newer or specialized medications (e.g., certain advanced diabetes drugs, some growth hormone therapies, specific osteoporosis agents), medical devices (like some insulin pumps or continuous glucose monitors and their supplies), or treatments considered primarily for lifestyle or cosmetic reasons may have different coverage criteria or require special authorization. It's crucial to discuss coverage specifics for any proposed investigation or treatment with Dr. Hayoun's office, the hospital/clinic, or Régie de l'assurance maladie du Québec (RAMQ) directly.

Is a referral required to see Dr. Hayoun, an Endocrinologist (Diabetes & Metabolism Focus)?

Yes, for services covered by the provincial health plan, a referral from your family physician or another specialist (e.g., an internist, pediatrician, or gynecologist) is almost always required to schedule an appointment with an Endocrinologist (Diabetes & Metabolism Focus) such as Dr. Hayoun. Endocrine system disorders often involve complex interactions and can have wide-ranging effects, so an initial assessment by your primary care provider helps determine if specialist care is needed and ensures that relevant preliminary tests and medical history are available to the endocrinologist. This facilitates a more focused and efficient consultation.

What types of diagnostic tests are commonly used by an Endocrinologist (Diabetes & Metabolism Focus) like Dr. Hayoun?

An Endocrinologist (Diabetes & Metabolism Focus) like Dr. Hayoun utilizes a variety of tests to diagnose endocrine disorders. Blood tests are fundamental for measuring levels of specific hormones (e.g., TSH, free T4, cortisol, ACTH, testosterone, estrogen, LH, FSH, insulin, HbA1c, prolactin, PTH, calcium, vitamin D). She often orders dynamic endocrine function tests, where hormone levels are measured after administering a stimulating or suppressing agent (e.g., ACTH stimulation test for adrenal function, oral glucose tolerance test for diabetes/acromegaly, dexamethasone suppression test for Cushing's). Imaging studies like thyroid ultrasounds, CT scans, or MRIs of the pituitary or adrenal glands are common. Bone mineral density (DXA) scans assess for osteoporosis. For thyroid nodules, a fine-needle aspiration (FNA) biopsy might be performed or arranged.

I have a thyroid nodule. What can I expect during an evaluation with an Endocrinologist like Dr. Hayoun?

When evaluating a thyroid nodule, an Endocrinologist like Dr. Hayoun will conduct a thorough assessment. This typically involves reviewing your medical history (including any symptoms of thyroid dysfunction or family history of thyroid disease), performing a physical examination of your neck and thyroid gland, and ordering blood tests to check your thyroid function (TSH, and possibly free T4, T3, and thyroid antibodies). A thyroid ultrasound is almost always performed to precisely characterize the nodule's size, number, and sonographic features (e.g., solid, cystic, calcifications, irregular margins). Based on these ultrasound characteristics and the nodule's size, Dr. Hayoun will determine if a fine-needle aspiration (FNA) biopsy is needed to obtain cells for microscopic examination to rule out thyroid cancer. Most thyroid nodules are benign.

What treatment options for osteoporosis might Dr. Hayoun discuss?

If you are diagnosed with osteoporosis, Dr. Hayoun will discuss a management plan aimed at reducing your risk of fractures. This starts with lifestyle modifications, including ensuring adequate intake of calcium and vitamin D (through diet and/or supplements), engaging in regular weight-bearing and muscle-strengthening exercises, smoking cessation, and limiting alcohol intake. Fall prevention strategies are also important. If medication is indicated based on your bone density (DXA scan) and fracture risk assessment (e.g., using FRAX or CAROC tools), options include antiresorptive medications that slow bone loss (like bisphosphonates or denosumab) or anabolic agents that stimulate new bone formation (like teriparatide or romosozumab). She will help choose the most appropriate therapy based on your individual circumstances, potential side effects, and treatment goals.

Dr. Hayoun mentioned 'dynamic endocrine testing'. What does that mean?

Dynamic endocrine testing involves tests that assess how your endocrine glands respond when stimulated or suppressed by specific substances. Unlike simple blood tests that measure baseline hormone levels, these tests evaluate the gland's functional reserve or its responsiveness to normal control mechanisms. For example, an ACTH stimulation test checks how well your adrenal glands produce cortisol when stimulated. A dexamethasone suppression test helps diagnose Cushing's syndrome by seeing if cortisol production can be suppressed. An oral glucose tolerance test can be used to diagnose diabetes or acromegaly. These tests usually involve taking a baseline blood sample, then administering a medication or substance, followed by one or more timed blood samples to measure hormone changes. Dr. Hayoun uses these tests for more precise diagnosis of certain complex endocrine conditions.

Clinique BCL, Bureau
3300 100e Avenue
Laval, QC H7T 0J7

Phone: (450) 634-2256 | Fax: (450) 903-0788

The facility is wheelchair accessible.

Dr. Hayoun is a licensed Endocrinologist (Diabetes & Metabolism Focus) 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. Hayoun 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=18804