Perri Klass is Professor of Journalism and Pediatrics at New York University where she directs the Medical Humanities minor. She attended Harvard Medical School and completed her residency in pediatrics at Children’s Hospital, Boston.

Her book, The Best Medicine: How Science and Public Health Gave Children a Future, is an account of how victories over infant and child mortality have changed the world (originally published as A Good Time to Be Born). She writes regularly about children's issues for many publications, and for years wrote a weekly pediatric column for the New York Times. She has written extensively about medicine, children, literacy, and knitting. She began writing about medicine and about medical training when she was a medical student; her accounts were collected in her two books, A Not Entirely Benign Procedure: Four Years as a Medical Student, and Baby Doctor: A Pediatrician’s Training, which were originally published in 1987 and 1992, and were reissued as classics of the genre in updated editions in 2010. Her most recent book of medical journalism is Treatment Kind and Fair: Letters to a Young Doctor.  Her medical journalism has appeared in a wide variety of publications, including Harpers, The Atlantic, The Washington Post, The Wall Street Journal, The New Yorker, The New England Journal of Medicine, and Harvard Medicine.  Her other nonfiction includes Every Mother is a Daughter: the Neverending Quest for Success, Inner Peace, and a Really Clean Kitchen, which she coauthored with her mother, Sheila Solomon Klass, and Quirky Kids: Understanding and Supporting Your Child With Developmental Differences, which she coauthored with Eileen Costello, M.D., the second edition of which was published by the American Academy of Pediatrics in February 2021.

Perri is the National Medical Director of Reach Out and Read, a national program which promotes early literacy through pediatric primary care, with guidance about reading aloud for parents and children’s books provided at routine well child visits. The program now reaches 4.2 million children a year, many of whom are growing up in poverty. Through her work with Reach Out and Read, Perri has been able to integrate her commitment to the health care of young children with her love of the written word. In an essay on the program, she wrote, "When I think about children growing up in homes without books, I have the same visceral reaction as I have when I think of children in homes without milk or food or heat: It cannot be, it must not be. It stunts them and deprives them before they've had a fair chance." 

She has received numerous awards for her work as a pediatrician and educator including the 2007 American Academy of Pediatrics Education Award, which recognizes her educational contributions that have had a broad and positive impact on the health and well-being of children; the 2006 Women’s National Book Association Award; and the 2011 Alvarez Award from the American Medical Writers Association. In 2016 the American Academy of Pediatrics honored her with The Arnold P. Gold Foundation Humanism in Medicine Award, citing the impact that she has made through her writing, service as an educator, and leadership in promoting early literacy through Reach Out and Read. In April 2021 Perri was elected to the American Academy of Arts and Sciences.

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