Dr. David Lachance

Dr. David Lachance provides assessment and treatment for a wide spectrum of mental health conditions, including:

Mood Disorders

• Premenstrual Dysphoric Disorder (PMDD): A severe form of premenstrual syndrome (PMS) with significant mood swings, irritability, depression, or anxiety in the week or two before menstruation.
• Major Depressive Disorder (MDD) / Clinical Depression: Persistent feelings of sadness, loss of interest or pleasure, fatigue, changes in appetite or sleep, and difficulty concentrating, significantly impairing daily functioning.
• Bipolar Disorder (Type I, Type II, Cyclothymia): Characterized by extreme shifts in mood, energy, activity levels, and concentration, ranging from depressive lows to manic or hypomanic highs.

Personality Disorders

• Obsessive-Compulsive Personality Disorder (OCPD): A preoccupation with orderliness, perfectionism, and mental and interpersonal control, at the expense of flexibility, openness, and efficiency (distinct from OCD).
• Avoidant Personality Disorder: Characterized by social inhibition, feelings of inadequacy, and hypersensitivity to negative evaluation.

Schizophrenia Spectrum & Other Psychotic Disorders

• Brief Psychotic Disorder: A sudden, short-term episode of psychotic behavior, often following a highly stressful event, lasting less than one month.
• Schizoaffective Disorder: A condition that includes symptoms of both schizophrenia (like hallucinations or delusions) and a mood disorder (like depression or mania).

This list is not exhaustive. Effective mental health care is highly personalized. Please consult with Dr. David Lachance for an accurate diagnosis and tailored treatment plan.

• Supportive Psychotherapy: A therapeutic approach aimed at reducing distress, reinforcing coping mechanisms, and improving adaptive functioning through a supportive therapeutic relationship.
• Comprehensive Psychiatric Assessment & Diagnostic Evaluation: In-depth clinical interview to assess mental health status, including review of psychiatric and medical history, family history, psychosocial factors, symptom patterns, and formulation of a multiaxial diagnosis according to DSM/ICD criteria.
• Group Therapy (various focuses, e.g., mood disorders, anxiety, trauma, DBT skills): Facilitating therapeutic groups where individuals with similar concerns can share experiences, learn coping strategies, and receive mutual support under the guidance of a therapist.
• Crisis Intervention & Urgent Psychiatric Assessment (in appropriate settings): Providing rapid assessment and intervention for individuals experiencing acute psychiatric crises, such as suicidal ideation, acute psychosis, or severe agitation, typically in emergency departments or crisis clinics.
• Capacity Assessment (Mental Capacity/Competency Evaluation - specific contexts): Specialized evaluations to determine an individual's mental capacity to make informed decisions regarding treatment, finances, or other legal matters, often in forensic or geriatric settings.
• Psychopharmacological Management & Medication Optimization: Prescribing, monitoring, and adjusting psychotropic medications (e.g., antidepressants, antipsychotics, mood stabilizers, anxiolytics, stimulants) to treat various mental health disorders, focusing on efficacy, tolerability, and minimizing side effects.

Note: This list provides a general overview. Treatment approaches are highly individualized. Please discuss with Dr. Lachance for care relevant to your specific mental health needs.

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

Dr. Lachance practices within the CISSS de Laval healthcare network in the Chomedey North neighborhood of Laval. The facility is situated conveniently near the vibrant areas of Centropolis and Place Bell (Arena/Theatre), making it accessible for residents and visitors alike. Public transit options are plentiful, with the Société de transport de Laval (STL) providing reliable bus services that connect the practice to the wider city region. The practice location is wheelchair accessible and designed to offer a comfortable and private environment, ensuring patients feel at ease during their visits. Paid parking options are conveniently located nearby, some with direct access to the building, making visits hassle-free for those arriving by car. The practice aims to maintain a discreet and welcoming atmosphere, prioritizing patient confidentiality and comfort at all times.

Are psychiatric consultations and treatments with Lachance, a Psychiatrist, covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations, diagnostic assessments, and medication management provided by a licensed Psychiatrist like Lachance are generally covered by Régie de l'assurance maladie du Québec (RAMQ) in QC when a referral from a family doctor is in place. Coverage for psychotherapy services provided by a psychiatrist can vary; some provinces cover it, while others may have limitations or it may be part of hospital-based programs. Specific medications may also require special authorization or be subject to formulary restrictions. It's crucial to discuss coverage specifics for therapy or any specialized treatments with Lachance's office or Régie de l'assurance maladie du Québec (RAMQ).

Do I need a referral to see Lachance, a Psychiatrist?

Yes, a referral from your family physician or another medical doctor (e.g., a pediatrician for child psychiatry, or an ER physician for urgent assessment) is almost always required to see a Psychiatrist such as Lachance for services covered by the provincial health plan. Mental health conditions often benefit from initial assessment by a primary care provider who can determine the need for specialist psychiatric care. The referral ensures coordinated care, appropriate triaging, and transfer of relevant medical history.

What is the main difference between a Psychiatrist like Lachance and a Psychologist?

The main difference is that a Psychiatrist, like Lachance, is a medical doctor (MD) who has completed medical school and then specialized residency training in psychiatry. Because they are physicians, psychiatrists can diagnose mental health conditions, prescribe and manage psychotropic medications, and provide various forms of psychotherapy. They can also order medical tests to rule out physical causes of psychiatric symptoms. A Psychologist typically has a doctoral degree (PhD or PsyD) in psychology and is trained in psychological assessment, diagnosis, and providing psychotherapy (talk therapy). Psychologists generally cannot prescribe medication in Canada, though they often work closely with psychiatrists or family doctors who do.

How can I prepare for my first appointment with Lachance?

For your first psychiatric appointment with Lachance, it's helpful to gather some information beforehand. Try to make a list of your main concerns, symptoms (including when they started, how often they occur, and their intensity), and any significant life events or stressors. Bring a list of all current medications (psychiatric and non-psychiatric), including dosages, as well as any past psychiatric medications you've tried and your experience with them. Information about your family history of mental health conditions can also be very useful. Be prepared to discuss your personal history, social situation, and coping strategies. Writing down any questions you have for Lachance can also ensure you get the most out of your consultation.

What does a Psychiatrist like Lachance specialize in?

A Psychiatrist is a medical doctor (MD) who has completed specialized training in psychiatry, which is the branch of medicine focused on the diagnosis, treatment, and prevention of mental, emotional, and behavioral disorders. Unlike psychologists, psychiatrists can prescribe medication. He is a Psychiatrist who assesses, diagnoses, and treats mental, emotional, and behavioral disorders through medication, psychotherapy, or other interventions. Lachance is trained to assess both the mental and physical aspects of psychological problems and can provide a range of treatments including psychotherapy, medications, and sometimes other interventions like ECT or rTMS.

When should someone consider a referral to a Psychiatrist like Lachance?

A referral to a Psychiatrist like Dr. Lachance is typically considered when mental health symptoms are severe, persistent, complex, or not responding adequately to initial treatments provided by a family doctor or therapist. This can include: thoughts of suicide or self-harm; severe depression or mania; psychosis (hallucinations, delusions); debilitating anxiety or panic attacks; complex PTSD; severe OCD; suspected bipolar disorder or schizophrenia; treatment-resistant depression; or when medication management by a specialist is indicated. Psychiatrists are also consulted for diagnostic clarification and comprehensive treatment planning, especially for co-occurring conditions.

CISSS de Laval
2008 boul René-Laennec
Laval, QC H7M 4J8

Phone: (450) 662-3665 | Fax: (450) 662-9124

The facility is wheelchair accessible and aims to provide a comfortable and private environment for all patients.

Dr. Lachance is a licensed Psychiatrist regulated by the Collège des médecins du Québec (CMQ) under the Medical Act in QC. A referral from a family physician or another medical doctor is typically required for consultations with Dr. Lachance 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=13231