Meet the Team

Katherine Grimes, MD, MPH
Benjamin Cook, phD, MPH
Greg Hagan, MD, FAAP
Amy Mayhew, MD, MPH
Cecil Webster, MD
Timothy Creedon , PhD

Katherine Grimes, MD, MPH 

Katherine E. Grimes, MD, MPH, is a child psychiatrist and children’s health services researcher whose contributions to the field of child psychiatry were honored in 2016 by the American Academy of Child and Adolescent Psychiatry. Dr. Grimes is the Founder and Director of the Children’s Health Initiative, at Cambridge Health Alliance (CHA), and was recently awarded a multi-year SAMHSA grant to study integrated systems-of-care for children. She also serves on the Child Health Services Research Interest Group for Academy Health, and is a consultant for the Center for Health Care Strategies, examining national trends in service use and expense. Dr. Grimes and her research team piloted shared training for pediatric residents and child psychiatry fellows in the delivery of mental health services for children within primary care in a study funded by the BCBSMA Foundation. She is currently extending that experience as an HMS – Academy member, with her medical education focus on teaching collaborative practice methods and improving workforce capacity.

Dr. Grimes is the PI for the longitudinal study of Massachusetts’ “Mental Health Services Program for Youth” (MHSPY), via a grant from the RWJ Foundation. MHSPY is an internationally recognized approach to cost-effective treatment of children and adolescents with serious emotional disturbance (SED). It was financially self-sustaining through a uniquely integrated system-of-care that relied on shared goals and blended funding across primary care, schools, juvenile justice, child welfare and mental health.

Dr. Grimes obtained her MPH from the Harvard T.H. Chan School of Public Health and is a former Faculty Research Fellow at Harvard’s Kennedy School of Government. Her experience with designing and delivering integrated care in the public sector has led her to focus her health policy efforts on improving mental health access and treatment quality for children and adolescents.

Benjamin Cook, PhD, MPH

Dr. Cook is the Director of the Health Equity Research Lab and the Center for Multicultural Mental Health Research, a Senior Scientist at Cambridge Health Alliance, and an assistant professor at Harvard Medical School. His research interests are in improving methods for measuring disparities, and applying these methods to understanding the mechanisms underlying mental health and substance abuse treatment disparities, the association between acculturation and mental health, and geographic differences in mental health service use disparities. He received a Ph.D. in Health Policy at Harvard University concentrating in Evaluative Science and Statistics, an MPH from UNC-Chapel Hill in the Department of Health Behavior and Health Education, and a BA in psychology from Swarthmore College.

Greg Hagan, MD, FAAP

Dr. Hagan is the Chief of Pediatrics at Cambridge Health Alliance, as well as a CHA Regional Medical Director, and recent past-President of the Massachusetts Chapter of the American Academy of Pediatrics (MCAAP). As a key player in our recent five year grant to study integrated care for children, within a community-based, participatory research model, Dr. Hagan was instrumental in the design and implementation of the role of the primary care clinician in the integrated model. He also contributes his expertise as a mentor and preceptor for Harvard Medical School students and Massachusetts General Hospital pediatric residents to our clinical training initiatives.

Amy Mayhew, MD, MPH

Dr. Amy Mayhew graduated from Wesleyan University in Connecticut, where she double-majored in English and African-American Studies.  Motivated to work towards social change but unsure in which capacity, she then worked in several nonprofit organizations geared towards education, youth, and the environment, including time at a residential treatment facility associated with UCSF.  She entered a Masters Internationalist MPH program with Tulane School of Public Health and Tropical Medicine and the Peace Corps, and then served as a Peace Corps volunteer in Nepal, where she decided to go to medical school.  After receiving her MPH, she returned to the United States and ultimately graduated from the University of Rochester School of Medicine and Dentistry.  She went on to complete her adult psychiatry residency at Menninger Department of Psychiatry at Baylor School of Medicine, where she receive a Laughlin Award, and then finished child psychiatry fellowship at Cambridge Health Alliance.  As a NHSC scholar, she then worked four years as a staff psychiatrist at Codman Square Health Center in Dorchester, MA.  While there, she participated in the Kraft Practitioner program and created a referral and triage system for patients presenting for psychiatric and mental health treatment at the health center.  She supervised the implementation of the child and adolescent services of the PTS in 2015, and came on as Medical Director in October 2016.  Academic interests include health care parity, unauthorized immigrants, trauma and resiliency, population management, family therapy, and social advocacy. 

Cecil Webster, MD

Cecil Webster is an instructor in psychiatry part time at Cambridge Health Alliance (CHA) and Harvard Medical School, and the Clinical Program Director of Diversity Health Outreach Programs at MIT. He also maintains a private practice in Back Bay, Boston. Dr. Webster has been involved for five years in CHA’s integrated psychiatry/primary care clinic where he most recently served as rotation supervisor for child and adolescent psychiatry fellows. He has published and presented in areas including mental health/pediatrics integration, LGBT parents in primary care settings, school mental health consultation, and culturally mediated influences in psychotherapy such as racial/ethnic identity, and gender and sexuality. He completed his general residency at Baylor College of Medicine where he served as chief resident, and his child and adolescent psychiatry fellowship at Cambridge Health Alliance/Harvard Medical School. He is a former Diversity Leadership Fellow of the American Psychiatric Association, as well as a former American Psychoanalytic Association Fellow.

Timothy Creedon , PhD

Timothy Creedon is a Research Associate at the Health Equity Research Lab and a PhD candidate in Social Policy with a concentration in Behavioral Health Policy at Brandeis University. He is currently the recipient of an F31 predoctoral training grant from NIDA and was previously supported by a T32 grant from NIAAA. His research interests include access to behavioral health services, racial/ethnic health disparities, social determinants of health, and community-based interventions (e.g., supportive housing) for individuals with serious mental illness. He holds a MA in Social Policy from Brandeis University and a BA in History from Tufts University.