Cheryl Greenfield, M.D.

Dr. Greenfield was born and raised in Massachusetts.  She holds a BA in psychology from Simmons College and received her MD from Boston University School of Medicine.  Following her internship and residency, she began practice with her father, Dr. Theodore Greenfield, in Brockton MA.  After his retirement, Dr. Greenfield continued in practice in Brockton until moving to Marion in 1995.  Dr Greenfield is a Fellow of the American Academy of Pediatrics and a Diplomate of the American Board of Pediatrics with a Maintenance of Certification in 2009.  This Maintenance of Certification reflects Dr. Greenfield’s commitment to state of the art, evidence based care for patients.  Dr. Greenfield is an avid sailor and outdoor sports enthusiast.  In addition, she enjoys spending time with her family, cooking and restoring her Victorian Craftsman home.  Dr. Greenfield is the heart and soul of the practice and is completely dedicated to her patients.


Ellen Lewis, FNP

Ellen was born and raised on the North Shore of Massachusetts.
She received her BA in Psychology and Sociology from Boston State College and earned a Masters Degree from Boston College with a concentration in adolescent counseling psychology.  Ellen became a Family Nurse Practitioner following a long career as a health care administrator.  Ellen received her MSN from Regis College and was a student NP with Dr. Greenfield in Brockton before joining the practice upon graduation.  She has taught at Bridgewater State College, Stonehill College and Regis College.  Ellen is an accomplished woodworker and also enjoys gardening, kayaking, and the Red Sox.  Ellen lives on Cape Cod with her family.


Michelle Cronin, Practice Administrator

Michelle came to Gleason & Greenfield Pediatrics in 2002 as a part-time file clerk.  Dr. Greenfield recognized Michelle’s many talents and her wonderful way with patients and quickly moved her into a full time position with increasing responsibilities until she became Practice Administrator in 2005.  Michelle enjoys spending time with her family and attending the many sporting events that having two boys brings. 



Paulette Arnold, BSN, RN

Paulette graduated from the University of Connecticut and worked as a VNA nurse and hospice nurse until joining Gleason & Greenfield Pediatrics in 2002.  Paulette enjoys cooking, oil painting, knitting and, most of all, taking care of her beautiful grandchildren. 




Marion Macrina, RN

Marion earned her Associates Degree in Nursing from Massasoit Community College.  Marion and Dr. Greenfield have known each other for many years dating back to their work at Brockton Hospital where Marion was a nurse on the Pediatric Unit.  Marion is also certified as a SANE (Sexual Abuse Nurse Examiner).  Marion enjoys curling, working out at the gym and spending time with her grandchildren.



Amy Germano, MA

Amy graduated from the Salter School as a certified Medical Assistant in 2007.  After working in retail sales, Amy joined Gleason & Greenfield Pediatrics in 2008.  Amy enjoys spending time with her 2 children.



Diane Sousa, MA
Diane earned an Associates Degree from New England Tech and holds national certification as a Medical Assistant.  Diane began at Gleason & Greenfield Pediatrics as a medical assistant intern in 2003 and was hired immediately after graduation in 2004.  Diane enjoys the beach, shopping, spending time with her family and traveling to Portugal to visit family and friends.



Monday /Friday 8 to 5
Saturday by special arrangement 8:30 to 12

40 Wareham Road
Marion, MA 02738
508-748-1313 • fax: 508-748-2590