Dr. Ballenger is a native of Louisville, Kentucky and graduate of Brown University and Howard University School of Medicine. She came to Boston for her pediatric training. She completed her pediatric residency, and a year of fellowship in General Pediatrics, at Boston City Hospital, now Boston University Medical Center, and a second year of fellowship at Children’s Hospital. 

Before establishing her private practice in Cambridge, her clinical practice included care for children admitted to the Commonwealth’s psychiatric hospital for children; primary care at several of Boston’s distinct Neighborhood Health Centers; and as staff physician in the Division of General Pediatrics at Children’s Hospital, Boston.

Her academic and clinical interests have focused on urban pediatric and adolescent primary health care including: adolescent mothers and their children; access to care for homeless children living in motels; medical student and resident education. Recently, through the Pediatric Physicians’ Organization at Children’s (PPOC), Dr. Ballenger has worked on quality improvement measures in pediatric primary care, especially in the area of evidence based diagnosis, treatment and management of ADHD in primary care settings. She is the physician supervisor for the Practice’s Medical Home Initiative.

Over the past 20 years, she has been active at Harvard Medical School (HMS), tutoring in Patient-Doctor I and III; lecturing on topics in child development and adolescent health; as a preceptor for the 3rd year Pediatric Primary Care Clerkship; as well as preceptor for Primary Care residents in their continuity clinics. She is a senior member of the Inter-Society Multicultural Fellows Committee, as well as the Cross Cultural Care Committee. However, her most sustained work on behalf of students and HMS, has been as a member of the admissions committee, serving for almost 20 years, both as a subcommittee chair and as a member of the main admissions committee.

She has received recognition and awards from Harvard Medical School and Children’s Hospital for her contributions to medical student education and commitment to quality primary care. In 2000 she received the Harold Amos Faculty Diversity Award in recognition of her “contributions and commitment to the advancement of diversity at Harvard Medical School and Harvard School of Dental Medicine.” And in 2009 Harvard Medical School students selected Dr. Ballenger to receive the AAMC (the American Association of Medical Colleges) Humanism in Medicine Award. The award honors a medical faculty who “exemplifies the qualities of a caring and compassionate mentor in the teaching and advising of medical students.” In 2010 she was the recipient of the Award of Service to Pediatrics and the Community, presented by Children’s Hospital and the Pediatric Physicians’ Organization at Children’s to four eastern Massachusetts pediatricians.

Dr. Ballenger feels especially honored to be included in the book, Respect: An Exploration, written by Harvard University sociologist, Professor Sara Lawrence-Lightfoot, the Emily Hargroves Fisher Professor of Education. Dr. Ballenger is the subject of a chapter entitled, Healing.

She is the medical consultant for the Crispus Attucks Children’s Center in Dorchester.

Dr. Ballenger is married to William Poole, J. D., a retired federal attorney who worked in the U. S . Department of Housing and Urban Development, and is from Tuskegee, Alabama. Her hobbies include gardening, quilting and children’s literature, and for fun Dr. Ballenger enjoys impromptu singing and dancing.



Aislyn Cangialose joined WCP in 2013. After graduating from Wellesley College with a Bachelor of Arts in Psychology, Aislyn spent four years at Children's Hospital Boston as a clinical research coordinator, where she developed a strong interest in nursing and pediatric patient care. She received her Masters of Science in Nursing from Yale University, and feels very fortunate to have spent the last year of her clinical training working with and learning from our clinicians at WCP. She joined our practice as a Pediatric Nurse Practitioner after graduating from Yale in May 2013. Aislyn lives in Cambridge with her husband, Roberto, their daughter, Pia, and their son, Mateo. Aislyn also enjoys visiting her family in Southern California, especially in the winter months!



Michaela received a bachelor of science in health science, with a concentration in public health from Merrimack College in 2018. While attending Merrimack College she participated in numerous public health focused service opportunities, including service trips to Baltimore, MD and San Diego, CA. Upon completion of her senior internship at Massachusetts General Hospital in the Center for Quality and Safety, she recognized that a career focused on patient care was her calling. She enrolled in the accelerated bachelor of science in nursing program at Northeastern University, graduating with honors in May of 2020. She completed numerous clinical rotations, with her pediatric rotation at Boston Children’s Hospital and her public health rotation at Harvard Public Schools being her favorites. 

Both her public health and nursing degrees were quickly put to use upon graduating in the midst of the COVID-19 pandemic. While working with the pediatric population had been her goal, she recognized the abundant need for geriatric care and accepted a position in a long term care facility where she worked through the first major waves of the pandemic. When the COVID-19 vaccine gained approval, she was eager to contribute to the state’s vaccination efforts at a vaccine clinic. Now she is thrilled to finally pursue an opportunity in pediatric nursing!

In her free time, she enjoys being outdoors and loves to travel. In the summer months, she spend weekends on Lake Winnipesaukee with family and friends! She love to sail, swim, and spend time at the beach. In the colder months, she enjoys leaf peeping around New England, skiing, and spending time in front of the fire with a good book! 



Sara is a Registered Dietitian and Pediatric Clinical Nutrition Specialist. She received her Master of Science Degree in Food and Nutrition from Framingham State University, where she was awarded theMead Johnson Nutritionals/Bristol-Myers Scholarship as well as the Alumni General Graduate Scholarship. Sara gained her title as a Registered Dietitian and Licensed Dietitian/Nutritionist in the summer of 2009, and began working as a Pediatric Clinical Nutrition Specialist at Boston Children’s Hospital where she is still employed. Sara’s work in the field of dietetics has focused on liver and intestinal transplant, ulcerative colitis, diabetes, eating disorders, picky eating, failure to thrive, multiple food allergies, overweight and obesity. Sara plans to continue to expand her expertise in the field of Medical Nutrition Therapy for the pediatric population as her career progresses, and thoroughly enjoys working with children and their families.



Dan Epstein graduated from the Eastman School of Music in 1972. While attending Case-Western Reserve Medical School, he also taught flute at the Cleveland Institute of Music. After his pediatric residency training at Yale, together with his longtime artistic collaborator, dancer Rozann Kraus, he came to Massachusetts as an Artist in Residence at the Clark University Center for Contemporary Performance.

While in Worcester, Dan directed the Growth and Nutrition Clinic at UMass Medical Center. In 1984, he came to Children's Hospital as a fellow in the Psychiatry Department, eventually joining the Department of General Pediatrics where, in addition to teaching, he saw patients in the Primary Care Center and the Children's Hospital Growth and Nutrition Clinic.

In 1990, Dr. Epstein joined Norm Sherry and Gerry Hass in what would eventually become West Cambridge Pediatrics. He has always had a great interest in the stories his patients tell.

Dan has been teaching at Harvard Medical School since 1988, where he is currently an Assistant Professor of Pediatrics, part-time. For the last several years he has been Vice President of the Pediatric Physicians Organization of Children's Hospital; and during 2007-2008, he was the Interim Medical Director of the Children's Hospital Integrated Care Organization.

Dan continues to sing with the Spectrum Singers, play the flute, and hike the Grand Canyon every October. He lives in Cambridge with his partner, Rozann Kraus, and his dog, Boo. His daughter and son-in-law live downstairs, along with his two young granddaughters, Tali and Ru. His son lives a town over and stops by for dinner often.



Greta Feinberg received a Bachelor of Arts degree in Cultural Anthrolopology from Skidmore College and her Masters degree in Nursing from Boston College School of Nursing. She worked at West Cambridge Pediatrics from 2004 - 2009 and then moved to Austin, Texas for a few years. She is very excited to be back at WCP again and enjoys working with new families, travel medicine and public health. Greta also teaches part-time in the Graduate Nursing Program at Simmons College. She lives in Newton with her husband, Matt, sons Abe and Zach, and two dogs. She loves to run, sew, ski and travel with her family.



Yoni Gall has some Midwestern roots growing up in Kalamazoo Michigan before moving to New Jersey for middle school and high school. At this point though he is a New Englander, having spent over half his life between Providence and Boston. He attended Brown University for undergraduate studies followed by Boston University School of Medicine for his combined MD and PhD degrees. He continued on in the Boston Combined Residency Program working at Boston Childrens Hospital and Boston Medical Center. He was fortunate enough to have his primary care clinic during residency at West Cambridge Pediatrics (WCP), which changed his life as he had intended to be a renal researcher. Now, instead, his time at WCP as a resident has made him excited to be a primary care doctor.

He has recently moved back to Cambridge with his wife, Dr. Judy Nee, a gastroenterologist at Beth Israel, and two daughters, Ruby and Elly. The family loves living the Cambridge life, from the food, to the schools, to the concerts and museums.

Joining West Cambridge Pediatrics and moving back to Cambridge, it just feels like home.



Jennifer Gill joined the WCP team in early 2010 and is thrilled to be part of this dynamic and diverse practice. After graduating from Bowdoin College with a degree in Anthropology and Environmental Studies she served as a Peace Corps Volunteer in Eritrea, a small country in the Horn of Africa. She returned to her roots in the Midwest to attend medical school at Case Western Reserve Medical School, and graduated with high academic honors and a collection of awards recognizing her dedication to patient care. After medical school, Jennifer received her pediatrics training at the Boston Combined Program in Pediatrics through Boston Medical Center and Children's Hospital Boston, where, incidentally, she trained together with Dr. Pearl Riney - the two have been close friends ever since. After residency, Jennifer completed a three year academic fellowship at Boston Medical Center in General Pediatrics, simultaneously completing a masters in public health degree from Boston University School of Public Health. During her fellowship and masters training, Jennifer cultivated a long standing interest in international health and working with underserved populations. She returned to Eritrea to work with refugee and internally displaced populations and has also worked clinically in Tanzania and Lesotho. She has a a broad interest in pediatrics but is particularly interested in the special needs of adopted children and their families.

Jennifer is learning to play the cello, loves to read and to spend as much time outside as possible. With her husband Chris she has a young daughter named Kalkidan, a son named Eyob, and three lovely stepdaughters Bronwyn, Fiona and Delia.



MacKenzie King graduated from Middlesex Community College in January of 2020 with her associate's degree and will be completing her Bachelors in Nursing in August of 2021 from Southern New Hampshire University. Her first position as a registered nurse was on the spinal cord injury unit at Spaulding Rehabilitation Hospital in Charlestown where she developed a passion for helping the younger population on their road to recovery and adjusting to their new way of life. MacKenzie has always dreamed of helping and caring for the pediatric population.

MacKenzie resides in Merrimack, NH with her boyfriend. In her spare time, she loves to read, exercise, bake, travel, and decorate her apartment. She loves spending time with her four siblings and parents on weekends and during the holidays!



Cindy Luthern came to WCP in January 2002. Cindy graduated from Lafayette College in Easton, PA with a Bachelor of Science in Psychology. She moved to the Boston area in 1996 to pursue a career in healthcare. She received her Masters as a Pediatric Nurse Practitioner from Boston College School of Nursing.
She has a special interest in supporting new parents with feeding issues and newborn care and in adolescent medicine.

Cindy lives in Winchester with her husband Dan and three children, Abigail, Brett, and Elizabeth. She loves to ski, swim, run, bike, play and spend time with family on the Jersey shore among other places!



Erin O’Donnell is excited to return to WCPA. This is a special place where every member of the staff care for families deeply and she hopes to continue in this tradition. Dr. O’Donnell a proud Midwesterner raised in Northwest Indiana along the beautiful Indiana Dunes, near Chicago. She graduated with her B.S. in Applied Health Sciences, with a concentration in Human Development and Family Studies, from Indiana University- Bloomington. She then worked with children, adolescents and families in outpatient care and residential treatment settings in Indiana and Colorado. Graduate school brought her to Massachusetts in 2006, where she calls home. She graduated from Massachusetts School of Professional Psychology (now named William James College) in 2012 with a Doctor of Psychology (Psy.D.). She interned at Lexington High School providing clinical support to teens in need of social and emotional support and conducting psychological testing for the special education department.

Dr. O’Donnell was an intern, post-doctoral fellow and staff psychologist for Lynn Community Health Center. This was a rich experience of working a multi-stressed, multicultural population, including refugees. Dr. O’Donnell worked across the lifespan in a school-based health center, outpatient behavioral health clinic, and performing crisis evaluations and support to primary care. She designed and implemented quality improvement efforts to support new mothers, by conducting postpartum depression and anxiety screenings within the pediatric department. She spearheaded the behavioral health integration of their pediatric department. Dr. O’Donnell enjoyed providing clinical supervision in this dynamic setting.

With this background in community health and primary care psychology, Dr. O'Donnell takes a strong mind-body approach. Physical health and psychological health are interwoven and both must be nurtured to thrive. As a clinician who incorporates positive psychology techniques to assist in building resilience, Dr. O'Donnell encourages discussion about strengths from wherever they reside (e.g. family, community, ethnicity, faith, etc.). She practices collaborative care and treatment planning that incorporates Cognitive Behavioral Therapy techniques. Her areas of clinical specialty or extensive experience include: perinatal emotional complications, brief treatment for infant and toddler sleep challenges, tantrums, parenting stress, ADHD, trauma, health stress, weight management for kids and adolescents, higher functioning autism spectrum disorders, depression, and anxiety. Dr. O'Donnell is a welcoming clinician with a history of supporting LGBTQ adolescents to be their most resilient, authentic selves.

As a mother of two young children, Dr. O'Donnell can validate the complex feelings that come with the lived experience of being a parent. From frustration with breastfeeding through sleep training, tantrums, and supporting your child in the school system, she can assist with Positive Parenting techniques and awareness that the best of techniques are messy and challenging when you are in the parenting trenches.



Pearl Riney has been with WCP since August 2007. She is a graduate of the University of Vermont where she received a bachelor of arts in Spanish and Biology. She then spent a year in Los Angeles working for Planned Parenthood. She graduated from the University of Vermont College of Medicine in 2002, where she was awarded several honors and was elected into the Alpha Omega Alpha medical honor society. She did her residecy at the Boston Combined Program, at Children's Hospital Boston and the Boston Medical Center. After completing her residency she did a year of Chief Residency, where she focused in improving the primary care training in the residency program.

She has a broad interest in general pediatrics, but is particularly interested in adolescent medicine and neonatal medicine. She spends some time working at Mount Auburn Hospital in the department of newborn medicine. She comes from a long line of teachers in her family, and continues this good tradition teaching medical students, residents, and most importantly her patients and their families.

Dr. Riney has two boys, Penn and Cooke, and a litte girl, Ginger who keep her busy when she is not working at the office. She is married to Seth, who started a green limo service, Planettran, in 2001. She hails from Vermont, and loves to telemark ski, hike, make quilts and cook.



Sarah Teasdale, a native of the Catskill mountain region of NY, graduated with a BA with honors in classics from Union College. After college, Dr. Teasdale participated in the Teach For America program in Los Angeles, then returned east for a Masters in Education at Harvard, focusing on issues of risk and resiliency. Dr. Teasdale returned to the classroom after graduate studies, first at Hyde Park High then at the Boston Latin School, where she directed the theater program. At Latin School, Dr Teasdale created inter-school teaching programs for students to learn literature through peer-created performance, and led student trips to international theater festivals in Scotland. Although she loved teaching, Dr. Teasdale had long held the desire to be a pediatrician, and after nearly a decade in the classroom, she entered medical school at the University of Massachusetts, followed by residency in the Boston Combined Residency Program at Boston Children’s Hospital and Boston Medical Center. Prior to joining West Cambridge Pediatrics, Dr. Teasdale worked in the Primary Care Center at Boston Children’s Hospital where she was Clinical Director of the Rainbow Program for Children with Complex Medical Needs. Dr Teasdale has a passion for advocacy around issues that affect children and adults with sickle cell disease, enjoys writing and spending time with family. Dr. Teasdale lives with her husband, Pedro, who is professor of Mathematics and poet originally from Guatemala; their son, Gabriel; and her two soccer-star step sons, Juilen and Daniel.