Our Team


Dr. Michelle Guchereau

board certified Psychiatrist

Dr. Guchereau specializes in the psychiatric evaluation, complementary therapy approach, and medical management of children, adolescents and adults in San Francisco, CA. She has been certified by the American Board of Psychiatry and Neurology in both general psychiatry and child and adolescent psychiatry.

Dr. Guchereau has over a decade of experience as a psychiatric clinician,

Read More

and earned her Medical Doctorate at the prestigious University of California, San Diego, School of Medicine. She served in the US Air Force and was awarded the Air Force Achievement Medal for her support of active duty military and their family members all over the world.

Dr. Guchereau specializes in the evaluation and treatment of the attention issues (ADD/ADHD), depression and anxiety. She is committed to providing specialized and individualized service, and a comprehensive treatment plan is created for each patient. She is experienced in multiple modalities of psychotherapy, including psychodynamic psychotherapy, cognitive behavioral and mindfulness-based approaches.

She tailors each psychotherapeutic and medication intervention to the individual patient and issues presented, taking care to understand and work within the framework of psychological, social and biological factors unique to each individual.



Erik Lee - photo

Erik Lee

Psychiatric Mental Health Nurse Practitioner (PMHNP)


Prior to becoming a PMHNP, Erik spent several years as a psychiatric registered nurse (RN) at the Zuckerberg San Francisco General Hospital’s Psychiatric Emergency Services (PES) and acute psychiatric and forensic inpatient units (7B, 7C, 7L); and the San Francisco VA Medical Center’s Psychiatric Intensive Care Unit (PICU). In these settings, he performed a variety of roles, including charge nurse, triage nurse, and floor nurse. On behalf of the VA, he co-presented at the American Psychiatric Nurses Association’s (APNA’s) 2014 national and 2015 California chapter Annual Conferences on the topic:

Read More

Transforming to a recovery-oriented system of care in an psychiatric ICU:  The risks, the rewards, and the role of nursing. From 2013 to 2015, Erik also worked as adjunct clinical instructor for Samuel Merritt University, teaching Mental Health Nursing (N534) for Masters of Science in Nursing students and supervising them during their clinical rotations at St Francis Memorial Hospital’s inpatient psychiatric unit.

Since becoming a PMHNP, Erik has worked in high-volume settings with varied patient populations in San Francisco. From 2014 to 2018, he was the psychiatric provider at the Felton Early Psychosis Program (formerly called the Prevention and Recovery in Early Psychosis (PREP) program). At PREP, Erik managed the medication needs of young people experiencing their first psychotic or manic episodes, as well as clients considered to be at high risk of developing psychotic and bipolar disorders.

From 2014 to 2017, Erik worked as a psychiatric consultant at Progress Foundation’s transitional residential treatment centers, ensuring that residents receive continuity of psychiatric care. These include their Senior’s Program, which focuses on seniors (age 60 or over) with psychiatric or social adjustment problems, and Cortland House, a 90-day residential treatment program for adults with psychiatric and co-occurring (formerly dual-diagnoses) conditions.

Since 2015, Erik has worked at Westside’s Outpatient and Crisis Clinics. There, he provides medication management and crisis services to uninsured, low-income, and/or indigent clients with a wide variety of psychiatric conditions, including psychotic, major mood, anxiety, insomnia, trauma-related, and attention deficit/hyperactivity disorders; personality disorders, traumatic brain injuries, and co-occurring substance use disorders.


Erik completed a Post-Masters PMHNP program at the University of California, San Francisco (UCSF) with a GPA of 4.0. He was a recipient of a Gero-Psychiatric Stipend. He completed his PMHNP residency at UCSF’s Langley Porter Psychiatric Institute’s Consultation-Liaison Services, supporting the management of patients with mental disorders who have been admitted for the treatment of medical problems at UCSF Medical Center’s emergency room and inpatient units.

Erik earned a Masters of Science in Nursing degree from Samuel Merritt University, Oakland, CA, graduating summa cum laude. His thesis is entitled Nurse Care Coordination Program for Early Intervention for First Episode Psychosis.


2012 APNA Ortho-McNeil Janssen Scientific Affairs, LLC Student Scholarship awarded to the “outstanding graduate nursing student who has demonstrated a commitment to psychiatric mental health nursing”

  • Kindred Healthcare Scholarship
  • SMU Nursing Scholarship
  • T&R Scott Scholarship
  • Sigma Theta Tau (nursing honor society)

Erik holds Bachelors of Arts degrees in Human Development (Adult & Gerontology) from California State University, East Bay (summa cum laude), and in Sociology and European Studies from the National University of Singapore.


  • Institute of Functional Medicine,
  • American Psychiatric Association Annual Conferences,
  • Master Psychopharmacology Program with the Neuroscience Education Institute,
  • Various intensive workshops on cognitive behavioral therapy, motivational interviewing, and integrative medicine


In setting up a private practice, Erik hopes to bring his clinical skills to bear, covering crucial gaps in the needs of San Francisco residents needing mental health services.

Erik splits his time between San Francisco and San Diego. He lives with his husband Tom, and their dog Nemo. He enjoys gardening, traveling, and reading non-fiction books. A native of Singapore, Erik has lived in the Bay Area for 20 years.



Brea Di Dato


Brea Di Dato is an experienced Family Nurse Practitioner who has completed a Post- Master’s Certificate in Psychiatry. She spent over a decade providing care in acute settings, such as critical care and oncology, before transitioning to primary care in 2017.

Since her transition to Nurse Practitioner in primary care she has been diagnosing and treating mental health disorders in an outpatient setting. Because she is also trained as a primary care provider, she understands the critical link between physical and mental

Read More

well-being.​ She is adapt at identifying underlying medical conditions and mental health disorders.

She has experience treating:
• Depression
• Bipolar disorders
• Anxiety disorders



Jon May

Psychiatric Mental Health Nurse Practitioner (PMHNP)

Jon May is an ANCC board-certified Psychiatric Mental Health Nurse Practitioner. He is a passionate mental health advocate focused on providing compassionate evidenced-based care while employing the latest innovations in psychiatry. Jon completed psychiatric internships at Well Coast and in Santa Clara public health clinics, where, working alongside multi-disciplinary teams, he treated clients with chronic mental illness and complex medical diagnoses.

Read More

Jon’s vast clinical experience includes critical care, medical education, quality improvement, and healthcare informatics.  His distinct background makes him uniquely suited to support clients navigating mental health concerns in the diverse technology-focused setting of the Bay Area.  Jon is a life-long supporter of human rights and the LGBTQIA+ community, and he is deeply committed to a “whole person” approach, where mind, body, and spirit are emphasized.

Jon has expertise in evaluating and treating:

  • Attention-deficit / Hyperactivity Disorder (ADD/ADHD)
  • Mood disorders (bipolar disorder, depressive disorder, perinatal depression)
  • Anxiety disorders (generalized anxiety disorder, social anxiety, panic disorder



Marco Oliver D. Lopez


Marco is a doctorally-prepared advanced practice nurse who is board certified as a both a Family Nurse Practitioner and a Psychiatric Mental Health Nurse Practitioner.  He brings over 12 years of experience working as a Registered Nurse in various clinical and non-clinical areas including primary & ambulatory care, medical-surgical nursing, psychiatric-mental health, clinical informatics, nursing education, and staff development. He received his training and experience in San Francisco at PRC, Progress Foundation, Zuckerberg San Francisco General Hospital and Training Center, and Westside Community Services.

Read More

Marco values collaborative practice in promoting competent, evidence-based, and personalized care to patients and families.  A dedicated life-long learner, Marco is an adjunct faculty member at the University of San Francisco, and has earned an impressive array of academic credentials, including:
  • Doctor of Nursing Practice with a focus on Healthcare Systems Leadership (University of San Francisco)
  • Master of Science in Informatics – Health Specialization & Post-Baccalaureate Wound Care Certificate (San Jose State University)
  • Post-Master’s Psychiatric Mental Health Nurse Practitioner Certificate (University of California, San Francisco)
  • Post-Master’s Family Nurse Practitioner Certificate (Sonoma State University)
    Master of Science in Nursing (Holy Names University)
  • Master of Business Administration (Holy Names University)
  • Associate in Science in Computer Networking & Information Technology w/ emphasis in Network Security (City College of San Francisco)
  • Associate in Science in Social and Behavioral Sciences (City College of San Francisco)
Marco is our provider on staff for Saturdays in our San Francisco office.



Victor Torres-Collazo


Victor Torres-Collazo, MD provides specialty psychiatric evaluations, medication management and consultations for adults. He specializes in assessments and treatment of patients with comorbid medical and psychiatric issues.

Dr. Torres-Collazo is ABPN board-certified in both General Psychiatry and Consult-Liaison Psychiatry/CLP. He completed fellowship at Georgetown, during which he also trained at the National Institutes of Health (NIH). 

Read More

He is very experienced with pharmacogenetic testing, neuropsychiatric issues, complex medical issues and medication management. He is fluent in both English and Spanish.

As a specialist, Dr. Torres-Collazo does a very thorough review of each case, including medical records, imaging and labs. This is often a more thorough evaluation process than that of non-specialist psychiatrists or providers, and patients should NOT expect a prescription on the first visit. Here’s more info on his specialty:


Dr. Torres-Collazo is not currently in-network for any insurance panels and can only accept patients who are “self-pay.” We can provide a statement (ie- superbill) for patients to submit to their insurance company if their plan allows for reimbursement for services by “out-of-network” providers.

Once an assessment and treatment plan is formed, Dr. Torres-Collazo can provide consultation to other providers and/or transfer care to a psychiatric provider in-network at Well Coast or elsewhere as requested by the patient and as medically indicated.



Emily Samuel


Emily has been a Psychiatric Nurse Practitioner for over 6 years and a Psychiatric Nurse for over 10 years. She is a California Board-Certified Psychiatric Mental Health Nurse Practitioner (PMHNP) who provides medication management in order to alleviate symptoms of mental illness and allow you to reach your maximum potential of well being. Originating from the East Coast, her academic training includes Penn State University and University of Maryland. 

Read More

Her clinical experience includes work at Johns Hopkins Hospital, University of Maryland, Sheppard Pratt Health System (Maryland), The Complete Wellness Center (Los Angeles), Stanford Hospital, Westside Community Services (San Francisco), and Artemis Institute for Clinical Research (San Diego). She provides complete psychiatric evaluations and diagnostics, medication management, along with supportive psychotherapy. She has been working in telemedicine for over 3 years and believes in the effectiveness of videochat appointments as a successful approach to psychiatric treatment. She will meet you on the road to wellness and travel the journey together.


We are experiencing issues with self-scheduling follow-up appointments. Please call or text our office at (833) 931-1716 to book, cancel or reschedule a follow-up appointment.