Medical Leadership

James M. Greenblatt, M.D.

Chief Medical Officer & Vice President, Medical Services
Dr. James M. Greenblatt is chief medical officer and vice president of medical services at Walden. He provides medical management, leadership and oversight of Walden’s eating disorder programs. Working with thousands of children, adolescents and adults, Dr. Greenblatt found that each individual has a unique biochemical profile, range of behaviors and treatment needs. Dr. Greenblatt is board-certified in child and adult psychiatry. He received his medical degree and completed his adult psychiatry residency at George Washington University in Washington, D.C. He completed a fellowship in child and adolescent psychiatry at Johns Hopkins Medical School. In addition, Dr. Greenblatt is a clinical faculty member in the psychiatry department at Tufts Medical School. He lectures extensively throughout the United States and Canada on integrative therapies for mental health. He is the author of “Answers to Anorexia,” which draws on his many years of experience and expertise in integrative medicine and treating eating disorders. He also wrote “The Breakthrough Depression Solution,” which outlines a personalized nine-step method for beating the physical causes of depression, and “Answers to Appetite Control,” which confronts a mistaken understanding of why people struggle with weight management and introduces biological solutions for rebalancing appetite and eating patterns.

Shivkumar Jha, MD

Medical Director / Assistant Vice President, Medical Services
Dr. Shivkumar Jha is Walden’s medical director/assistant vice president, medical services. In his role, he provides direct patient care and medical supervision to patients across Walden’s eating disorder, psychiatric, residential and partial hospitalization programs. He is also responsible for providing leadership and mentoring to clinical staff across the entire organization. Prior to joining Walden, Dr. Jha was the associate medical director of United Healthcare and medical director at Behavioral Health, BlueCross BlueShield and psychiatrist-in-charge at Mclean Hospital. Dr. Jha completed his Residency at Tufts University Department of Psychiatry and M.D. and Bachelor’s from Boston University School of Medicine. He is a board certified adult psychiatrist with fellowship training in geriatrics.

Alexandra Natova, M.D.

Medical Director, Medical Services
Dr. Alexandra Natova is the medical director of medical services. In this role, she is in charge of the nonpsychiatric medical care provided to the patients admitted into Walden’s eating disorder, psychiatric, residential and partial hospitalization programs. She works in close collaboration with attending psychiatrists, nurse practitioners, nurses, dietitians, social workers and counselors. She completes patients’ initial medical evaluation upon admission and provides medical consultations for the management of patients’ medical problems during hospitalization. She is an active member of Walden’s Infection Control Committee, which serves to minimize patient and employee risk of infections. Dr. Natova received her medical degree from the Pavlov Higher Institute of Medicine in Bulgaria and completed internship and residency in medicine at St. Elizabeth’s Medical Center, Boston. Dr. Natova has extensive experience in hospital-based internal medicine and primary care. She has worked as an attending physician at Northeast Specialty Hospital, Braintree, Mass., and Kindred Hospital, Waltham, Mass. She has a private primary care practice at Natov Medical Associates, PC, Weymouth, Mass., and is also an assistant professor in medicine at Tufts Medical School.

Lucille Force, MSN, MHA

Assistant Vice President of Patient Care Services and Chief Nursing Officer
Lucille Force is responsible for providing 24-hour accountability for the professional practice, administrative and clinical operations of Walden’s psychiatric and eating disorder units and its residential program. Ms. Force has more than 20 years of nursing leadership experience, most recently as chief nurse executive at Universal Health Services – Arbour Health Systems in Boston. Before that, she was an associate chief nursing officer with Health Alliance Hospital in Leominster. Ms. Force also served as director of Women & Children’s Health at St. Luke’s Hospital in New Bedford, and as nurse manager at Women and Infants Hospital in Providence, R.I. She is currently an adjunct nursing professor at Bristol Community College, where she provides clinical instruction for nursing students in psychiatric nursing.

Debra Foti-Flynn, M.S., RN, CPNP

Associate Medical Director, Inpatient
Debra Foti-Flynn is the associate medical director on the eating disorders unit at Walden. Her responsibilities include coordination of care for complex, medically compromised eating disorder patients, daily collaboration with a multidisciplinary treatment team and daily medical and psychopharmacological evaluations. She also conducts ongoing assessments of patients for physical and emotional safety, psychiatric evaluations and physical exams. Before joining Walden, she was a full-time visiting professor of nursing at Regis College, where she also earned her master’s degree in nursing.

Gail Hanson-Mayer, APRN, CS, BC, MPH

Associate Medical Director, Ambulatory Clinics
Gail Hanson-Mayer is an advanced practice nurse responsible for medical and psychiatric management at Walden Behavioral Care clinic locations in Massachusetts. In this position, she coordinates care for patients with a variety of eating disorders. Working with a multidisciplinary team, Gail monitors and evaluates patient medication and provides ongoing physical and emotional assessments. Formerly, she was vice president of clinical operations at Walden and was responsible for the clinical operations of the inpatient and residential programs in Waltham. Gail has 35 years of nursing experience. Currently, she is the director of counseling services for Regis College with responsibility for the coordination of mental health services for undergraduate and graduate students. Previously, she was an advanced practice nurse at Comprehensive Psychiatric Associates where she provided outpatient services to a caseload of psychiatric, addiction, eating disorders and co-occurring disorder patients. In addition, Gail has worked in senior nursing and consulting positions at Sterling Resources LLC, Universal Health Services, Management Services Inc., Choate Health Management Inc. and Choate Health Systems Inc. She earned a nursing degree from Massachusetts General Hospital and a master’s degree in public health from Boston University School of Medicine.

Susan Murphy, NP

Nurse Practitioner
Susan Murphy is a nurse practitioner at Walden Behavioral Care’s Thoreau and Alcott inpatient units for adolescents and adults. Her responsibilities include coordination of care for complex, medically compromised psychiatric patients, daily collaboration with a multidisciplinary treatment team and daily medical and psychopharmacological evaluation. She performs ongoing assessments of patients for physical and emotional safety, psychiatric evaluations and physical exams. Before coming to Walden, Ms.Murphy worked as an NP in family medicine for five years. She also was director of nursing for the Hospice of the Good Shepherd in Newton, Mass., where she supervised NPs and staff nurses and maintained a patient caseload. Ms. Murphy was also an NP at Massachusetts General Hospital in Boston. In this role, she provided care to inpatient gastrointestinal and thoracic oncology patients, collaborated with attending physicians, residents and interns, formulated discharge plans and acted as a clinical oncology resource for staff nurses. Ms. Murphy is an adjunct faculty member at Simmons College, teaching clinical decision making to family nurse practitioner students.

Robert Love, M.A., MSN, LMHC, FNP-C

Nurse Practitioner
Robert Love is the lead nurse practitioner at Walden’s Thoreau Center for Adult Inpatient Psychiatric Care in Waltham. His responsibilities include coordination of care for complex, medically compromised psychiatric patients, daily collaboration with a multidisciplinary treatment team and daily medical and psychopharmacological evaluations. He conducts ongoing assessments of patients for physical and emotional safety, psychiatric evaluations and physical exams. Prior to joining Walden, Mr. Love was a clinical manager at White Glove House Call Health. There he provided acute and chronic medical care in the home and workplace in Massachusetts, New Hampshire and Rhode Island. During this time, Mr. Love was also a nurse practitioner at Arbour Counseling Services of Lawrence, Mass. At Arbour he provided psychiatric consultations and evaluations with medical monitoring of psychotropic medication for adolescents and adults. Over the course of his 35-year career, Mr. Love has held numerous clinical positions including family nurse practitioner, psychiatric charge and staff nurse, psychiatric counselor, crisis clinician and program/clinical director and clinical psychologist. He has degrees in nursing from Regis College and in psychology from Merrill Palmer Institute of Wayne State University. He is proficient in both English and Spanish.

Terry Smith, M.D.

Senior Psychiatrist
Dr. Terry M. Smith is a senior psychiatrist at Walden and is responsible for providing direct psychiatric and medical treatment to patients primarily on the Thoreau Center inpatient unit. He works closely and collaboratively with nursing and other medical staff as well as with case managers. He provides support to patients and their families, interacts with outpatient providers and agencies, testifies in commitment court hearings, and educates staff members through treatment teams, case conferences and grand rounds. Dr. Smith has extensive experience across all levels of psychiatric care and has served in leadership roles where he provided direction and clinical expertise to psychiatrists and nurse practitioners. Formerly, Dr. Smith was an attending psychiatrist at Bournewood Hospital. He has also served as medical director and attending psychiatrist at Marlborough Hospital, as medical director for Lahey Health Behavioral Services, as attending psychiatrist at Arbour Hospital in Jamaica Plain and as medical director of South Middlesex Opportunity Services in Framingham and Marlborough. Dr. Smith completed his psychiatry residency at Boston University. He received his medical degree from Quillen College of Medicine at East Tennessee State University. He has a master’s degree in computer science and a bachelor’s degree in forensic studies and psychology, both from Indiana University.

Jane Sullivan, PMHCS, BC

Nurse Practitioner
Jane Sullivan is a Nurse Practitioner at Walden’s Alcott Eating Disorder Unit. Her job responsibilities include coordination of care for complex, medically compromised eating disorder patients, daily collaboration with a multidisciplinary team, daily medical and psychopharmacological evaluations, ongoing assessments of patients for physical and emotional safety, psychiatric evaluations and physical exams. She formerly worked for many years at Walden’s Thoreau Center for adult psychiatric care. She has worked in many outpatient clinics and partial hospitalization programs,and held a faculty position at Troy State University. She began her career as a Captain/staff nurse in the United States Air Force. She received her BSN from University of Vermont and her Master’s Degree as a Psychiatric-Mental Health Clinical Specialist from Rivier University.

Emily R. Van Doren, PMHNP-BC

Nurse Practitioner
Emily R. Van Doren is a nurse practitioner at the Alcott Eating Disorder inpatient unit and at the Crescent Street Outpatient Clinic. Her responsibilities include coordination of care for complex, medically compromised eating disorder patients, daily collaboration with a multidisciplinary treatment team, daily medical and psychopharmacological evaluations as well as ongoing assessments of patients for physical and emotional safety, psychiatric evaluations and physical exams. Formerly, Ms. Van Doren was a nurse practitioner at Pediatric Associates of Lewiston in Maine where she worked with children, adolescents and young adults in a primary care setting providing consults to primary care providers, performing psychiatric evaluations, developmental-behavioral assessments and psychiatric medication management. Ms. Van Doren gained experience as a nurse practitioner while working in several practicum locations throughout New England including Cambridge Health Alliance, East Boston Neighborhood Health Center, Naval Health Clinic New England, Donald McKay School and Children’s Hospital, Boston. She has a master’s degree from the William F. Connell School of Nursing at Boston College and is a licensed family-mental health nurse practitioner (PMHNP-BC) and a pediatric nurse practitioner (C-PNP). She is a professional member of Sigma Theta Tau International – Honor Society of Nursing, Alpha Chi Chapter; American Academy of Nurse Practitioners, and American Psychiatric Nurses Association.

Katie Kahn, PMHNP-BC

Nurse Practitioner
Katie Kahn is a board certified Family Psychiatric Nurse Practitioner that works primarily in Walden’s Adolescent Residential and the Waltham Adolescent Partial Hospitalization Program. In this role, she is responsible for performing psychiatric evaluations, prescribing psychotropic medications as needed, providing ongoing follow-up for close psychopharmacogical monitoring, and collaborating daily with multidisciplinary team to ensure safe, holistic care. Ms. Kahn began her career as a registered nurse on a general medical unit at Boston Children’s Hospital. While working there for four years, Ms. Kahn cared for patients with a range of medical and behavioral diagnoses, including patients with eating disorders that required medical stabilization.While pursuing her Master’s Degree, Ms. Kahn interned at the South End Community Health Center and the Blackstone Elementary School, both located in Boston, MA. During these experiences, Ms. Kahn provided individual and group therapy to a diverse population throughout the lifespan with a variety of mental health diagnoses. After graduating from Northeastern University, Ms.Kahn completed a behavioral health fellowship at Harvard Vanguard Medical Associates in Cambridge, MA where she continued to gain experience providing individual therapy and prescribing psychotropic medications. Ms. Kahn has also worked as a clinical instructor for Northeastern University undergraduate and graduate nursing students studying psychiatric/mental health nursing.