Leonard H. Wexler, MD

Leonard H. Wexler, MD

Pediatric Oncologist

Clinical Expertise

Pediatric Oncology; Bone and Soft Tissue Sarcomas; Anthracycline Cardiotoxicity/Cardioprotection; Supportive Care

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Accepted Insurance Providers

Dr. Wexler accepts the following list of insurance providers. Select your insurance provider to see more details.

Contact and Location

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Find a Convenient Location

Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offers many services, including screening, chemotherapy, and medical testing.

About Me


MD, Boston University School of Medicine


General Pediatrics - Albert Einstein College of Medicine/Montefiore Medical Center


Pediatric Hematology/Oncology - National Cancer Institute

Board Certifications

Pediatrics; Pediatric Hematology-Oncology

I am a pediatric oncologist with a special interest in treating children, adolescents, and young adults with sarcomas of the bone and soft tissues. These are rare tumors — fewer than 2,000 cases are diagnosed in United States each year. I work with a team of oncologists, pediatric and orthopedic surgeons, and radiation therapists to offer unique expertise and treatment options to patients with both newly diagnosed and recurrent sarcomas.

I co-directed an international study to evaluate the effectiveness of chemotherapy for children with osteosarcoma, a type of bone cancer. I am the leader of a clinical trial evaluating a novel combination of chemotherapy agents and radiotherapy approaches to treat children with a soft-tissue cancer called rhabdomyosarcoma, particularly tumors with an intermediate or high risk of returning after initial therapy.

Some of the chemotherapy drugs that we use to treat children may injure heart tissue. I have been involved in the development and assessment of dexrazoxane, a drug we now routinely use to protect heart tissue in children who are receiving doxorubicin as part of their treatment.

To educate the next generation of physicians, I am one of the lead attending physicians on the faculty-fellow team, which is designed to work closely with young doctors who are training in this subspecialty to help them learn how best to identify the individual needs of patients and manage the care of children with malignancies.

Nationally, I have served on the National Comprehensive Cancer Network committee on fatigue in people with cancer. I also serve on Memorial Sloan Kettering’s fertility preservation committee to develop standards to refer patients for counseling and options.

My colleagues and I form a team of individuals who extend the same family-centered, holistic philosophy of care to our young adult and adult patients as we do with our younger pediatric patients. We try to connect with our patients and their families on a very personal level. Many of us maintain relationships with our patients outside the hospital and find great satisfaction in attending major life milestones such as weddings, births, Bar Mitzvahs, and confirmations.

Each year, I volunteer my time to work with children at Camp Simcha, a summer camp for children battling cancer. I find it incredibly rewarding to care for children — they are courageous and indomitable. They just want to finish treatment and go back to being kids who play and go to school. I am amazed at the strength of their families during this time as well, and I am as devoted to helping their children get better as if they were my own.

Awards and Honors

  • Castle Connolly: New York Magazine Top Doctors (2005-2009
  • 2011-2018)


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

Clinical Trials

Smiling doctors in the lab

Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Wexler’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.