Screening and Treatment of Early Psychosis (S.T.E.P) Clinic Staff

As part of the Psychotic Disorders Specialty Clinic, the Screening and Treatment of Early Psychosis (STEP) Clinic at CHL provides clinical service to individuals between the ages of 18 and 40 who are experiencing early psychotic symptoms or in the prodrome phase. For more information or to schedule an intake at the STEP Clinic, please call 508-373-7835. Click here for the STEP Clinic brochure.

Xiaoduo Fan, MD, MPH, MSc (Director)
Phone: 508-856-3881

Dr. Fan is an internationally renowned clinician and researcher specializing in psychotic disorders. Dr. Fan's clinical expertise includes early identification and intervention strategies for refractory symptoms of schizophrenia, medical comorbidity and real life functioning recovery. In addition, Dr. Fan is interested in cultural aspects of mental illness.

Amy Harrington, MD (Medical Director)
Phone: 774-312-2739

Dr. Harrington's interests include co-occurring psychosis and substance, as well as community mental health. As a board certified specialist in Addiction Psychiatry she provides screening and intervention for substance abuse, including cigarette smoking among patients in the clinic.

Irene Coletsos, MD

Dr. Irene Coletsos is an attending psychiatrist at Community Healthlink. She is also an assistant professor of psychiatry at the University of Massachusetts Medical School. Dr. Coletsos did her medical school training at UMass Medical School. She completed her residency in psychiatry in 2013 at two Boston, MA programs: St. Elizabeth's Medical Center/ Tufts Medical School; and at a Massachusetts Mental Health/Harvard Medical School program which specializes in early psychosis treatment. She was chief resident at both programs during her final year of residency.

Debika Paul, PhD

Dr. Paul is a licensed clinical psychologist who offers therapy and psychosocial treatments for young adults experiencing psychosis and their families. Her interests include treatment of major mental illness and community mental health.

Joyce Landers, MS, ANP-BC


Joyce Landers, MS, ANP-BC, is a board certified adult nurse practitioner. She has been providing primary medical care and chronic disease management for patients with mental illness, addiction and housing challenges for over seven years with Community Healthlink. More recently, in partnership with CHL's Outpatient Psychiatry Department and the SAMHSA funded Primary Behavioral Healthcare Integration project, she has developed a primary care clinic, now in its fourth year, which facilitates delivery of well-integrated, comprehensive care and wellness services to individuals who struggle with severe and persistent mental illness. She earned her Registered Nursing and Master's Degrees at University of Massachusetts, Worcester and a Bachelor of Arts in Psychology at University of Massachusetts, Boston.