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Comprehensive, compassionate, and respectful care for patients with substance use disorder.

Our Services

Greater Portland Health screens patients for substance use disorder during their first visit and at annual visits to help recognize any unmet need or opportunities for further screening, counseling, and treatment.

Tom Hibbert
Tom Hibbert


Tom is a person of 36 years continuous, long-term recovery. He suffered from heroin and alcohol addiction substance use disorders. As a Peer Support Coordinator/Recovery Coach, Tom uses his skills in motivational interviewing techniques to meet patients where they are in struggling with addiction disorders. He helps develop patients to center on their goals, leading to successful changes in daily living behaviors and better engagement in the recovery process.

Contact our Substance Use Program Coordinator, Mallory, at

(207) 874-2141 ext. 4011

or via e-mail

for a referral to Greater Pathways.


Renee Fay-Leblanc, MD, Chief Medical Officer


A board-certified physician, Renee attended medical school at the University of Vermont and completed her residency in Internal Medicine at New York University. She has been practicing Internal Medicine in the Portland area since 2006 and joined Greater Portland Health in 2014 as Chief Medical Officer. In addition to her administrative duties, Dr. Fay-LeBlanc sees patients at 180 Park Ave, 63 Preble Street and Franklin Towers.


Primary Care Providers

Alison Gorman, MD


A board-certified family physician, Alison earned her MD at Albany (NY) Medical College and completed her training in Los Angeles. She cares for patients from birth to end-of-life, and provides chronic disease management and adolescent health.

Megan Waterman, MD MPH


A board-certified family physician, Megan received her MD and MPH degrees from Boston University and completed her residency and academic fellowship training at UIC in Chicago, IL. She cares for patients of all ages, and particularly enjoys substance use disorder treatment (including medication-assisted treatment), chronic disease management, and women's reproductive health (including procedures such as contraceptive device placement and colposcopy).‚Äč

Diana Lapp, MD, Clinical Director at 180 Park Avenue


A board-certified family physician, Diana attended medical school at Howard University and completed her residency training in Oak Park, Illinois. Diana provides clinical leadership at the 180 Park Avenue health center.  She is excited to join the team and provide care from birth to end-of-life.

Lindsay Tremblay, MS, FNP


Lindsay received an MS in Nursing with a concentration as Family Nurse Practitioner from Georgetown University. Her recent professional experience includes working as a Family Nurse Practitioner at Sacopee Valley Health Center. Here, her role included working in Primary care as well as Urgent Care assisting walk-in patients with acute concerns. She feels privileged to be working at Greater Portland Health in Primary Care for all ages from birth to end of life.  

Courtney Pladsen, FNP


After receiving a Bachelor’s of Science in Nursing from Boston College, Courtney worked as an ER Nurse for five years, went on to get a graduate degree from Georgetown University, and became a Nurse Practitioner (NP). In 2018, she was awarded the Robert Wood Johnson Foundation’s Culture of Health Leaders Fellowship, where over the next three years she will continue to develop programs that promote health equity specifically for people who are experiencing homelessness. She currently provides medical, mental health, and substance use treatment to people who are experiencing homelessness at the 63 Preble St clinic as well as medical outreach to people who were formally homeless in the Housing First Locations across the city of Portland.

Behavioral and Mental Health Providers

Heather Roberts, LCSW/LADC, Social Work Supervisor 


Heather is a licensed clinical social worker who has specialized in substance use disorders for the past ten years. She has always had a passion for helping others and being able to aid in the process of change for those reaching out for support. Heather believes there is a strong correlation between substance use disorders and mental health and uses a variety of counseling techniques such as Motivational Interviewing and Cognitive Behavioral Therapy to address these concerns.