Dr. Thomas Klein was born in New York City in 1957. At the age of 16 he started college at Rensselaer Polytechnic Institute in Troy, New York where he graduated with honors. He earned his medical degree from Albany Medical College in 1980 at the age of 22 and then began five years of additional training.
Dr. Klein was an Intern, Resident and Chief Resident at Long Island Jewish Hillside Medical Center in New York City from 1980 to 1983. As a Chief Resident he supervised and taught over fifty physicians in three hospitals, managed the Intensive Care Unit, and was responsible for all hospitalized patients.
Dr. Klein completed his fellowship in Adult and Pediatric Allergy and Immunology at St. Christopher's Hospital in Philadelphia in 1985. During his training he performed clinical research, authored medical journal articles and presented scientific studies at medical conferences around the country.
In 1985 he opened his practice in Adult and Pediatric Allergy, Asthma and Immunology with offices in Havertown and Media, Pennsylvania. He opened his Lankenau Hospital office in 2006.
Dr. Klein continues to enjoy teaching as he frequently lectures at medical grand rounds and seminars throughout the country. He has worked as an expert medical consultant for law firms, an organic food company, pharmaceutical companies and a local school district. He has been interviewed on numerous occasions in New York and Philadelphia on television, radio and in newspapers. He has also authored chapters in several medical textbooks and has been recognized as a 'Top Doc.' Dr. Klein is Board Certified in Allergy and Clinical Immunology.