In 1976, Dr. Raymond Coleman joined his father, the late Dr. Allan Coleman, who established the practice in 1949 (we have three generation of families in the practice).  Dr. Coleman received undergraduate and medical degrees from Tufts University in Boston and trained at the University of Pennsylvania and Tufts-New England Medical Centers.  He has been a board member of the Centers for the Handicapped, Green Acres School, and Capital Camps.  He is a past president of the Montgomery County and Prince George's County Pediatric Society, and has been an active member of a School Community Action Team; the community based organization for preventing high-risk adolescent behavior; he has led parent education programs in hospital-based substance abuse programs as well.  He has also been proactive in the effort to address underage smoking and has received a leadership award from the Maryland Chapter of the American Academy of Pediatrics for spearheading anti-tobacco initiatives.  Dr. Coleman was named "Pediatrician of the Year" in 2006 by the Montgomery and Prince George's County Pediatric Societies.  In 2007, he was named "Best Pediatrician in Bethesda" by Bethesda Magazine.  In 2008, he received the Sulam Community Service Award.  He has also been named "Best Physician" by the Washingtonian Magazine, Checkbook Magazine, and U.S. News & World Report.  He has special interests in high-risk adolescent behavior and chronic diseases.  Dr. Coleman has a wife and two children.

Dr. Jeffrey Greenberg joined the practice of Drs. Coleman and Thillairajah in December of 2003, becoming a partner in Coleman Pediatrics a few years later. Jeff’s specific areas of interest are emergency medicine/preparedness, complex medical case care and coordination, and behavioral issues (ADHD, school problems…). Because of his emergency training experience, he is able to perform procedures (i.e., treat acute asthmatics, suturing, incision and drainage of abscesses) in the office. Dr. Jeff has also become well known as a problem solver and coordinator of care for children with complex or as yet undiagnosed entities.  Dr. Greenberg graduated from Syracuse University in 1990, The George Washington University School of Medicine and Heath Sciences in 1999 and completed his residency at Children's National Medical Center in Washington, DC in 2002.  Dr. Greenberg currently works part-time as a Senior Clinical Associate of ​Pediatric Emergency Medicine at Children's Hospital ER. He is very active in medical education in the office, at Children's and GWU. He has recently won awards for "Top Educator in the ER" and for "Top Clinical associate in the CNMC ER." Dr. Greenberg is originally from Ohio, but grew up in the Wheaton and later the Potomac area of Maryland. He attended John F. Kennedy High School and then graduated from Winston Churchill High School in 1986. Dr.Greenberg has a wife and 3 boys.  


Dr. Nandini Thillairajah joined Dr. Ray Coleman and his father Dr. Allan Coleman in practice in November of 1997, becoming a partner in Coleman Pediatrics in 2002. Her specific areas of interest are early childhood development, infant and toddler feeding and behavioral concerns, adolescent gynecology, and the eating and nutrition concerns of adolescents. She attended Princeton University and graduated magna cum laude in 1990 with a degree in Molecular Biology. She then attended the University of Pennsylvania School of Medicine and received her M.D. degree in 1994. In 1997, she completed her residency training in pediatrics from the Children’s National Medical Center in Washington D.C. She is a Fellow of the American Academy of Pediatrics and was Board Certified and recertified by the American Board of Pediatrics in 1998 and 2005. Dr. Thillairajah was born in Washington D.C. and grew up in Bethesda, Maryland. She attended the Holton-Arms School in Bethesda. Dr. Thillairajah lives in Bethesda with her husband and two children and understands many of the challenges facing parents and families. She is actively involved in her children’s schools and serves as a resource for the school community. Dr. Thillairajah was recently named as a U.S. News & World Report Top Doctor. She is in the office five days a week and some Saturdays.