Charles A. Sklar, MD -- Director, Long-Term Follow-Up Program

Charles A. Sklar, MD

Pediatric Endocrinologist


Director, Long-Term Follow-Up Program

Clinical Expertise

Pediatric Endocrinology; Abnormalities of Physical Growth and Sexual Development; Treatment-Induced Endocrine Disorders; Diseases of the Pituitary and Thyroid Glands; Long-Term Side Effects of Treatment for Childhood Cancers

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

Contact and Location

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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, University of Southern California Medical School


Children's Hospital of Los Angeles


University of California, San Francisco, Medical Center

Board Certifications

Pediatrics; Pediatric Endocrinology

We’ve made great strides in the treatment of childhood cancers, with more children surviving than ever before. This is tremendously rewarding to us as physicians. Yet with this success comes a possible risk of long-term side effects related to cancer and its treatment. As Director of Memorial Sloan Kettering’s Long-Term Follow-Up Program, I oversee the care of survivors of all types of pediatric cancers, educating them and monitoring their health so we can find and treat related health problems as early as possible.

We always try to emphasize that most survivors have normal healthy lives. But since we can’t predict the small percentage who may go on to develop problems, it’s important for them to get extra screening tests to monitor their health. At Memorial Sloan Kettering, we’re also able to offer survivors of pediatric cancer lifetime follow-up care through our Program for Adult Survivors of Pediatric Cancer.

To study the long-term effects of treatment, I was one of the founding members of the Childhood Cancer Survivor Study (CCSS), which is tracking some 14,000 adult survivors of pediatric cancers and a group of their healthy siblings. The findings of the CCSS have already identified several diseases and disorders that may be more common among some childhood-cancer survivors — information which former patients and healthcare professionals are using to determine the best way to monitor the health of survivors into adulthood.

As a pediatric endocrinologist, I also care for patients with any endocrine (hormonal) complications that may develop as a result of pediatric cancer therapy. I was attracted to endocrinology because I find it to be intellectually challenging, with its own internal logic and coherence. Treatment for cancer in children can sometimes cause problems with growth, sexual development, fertility, and thyroid function, as well as second cancers and heart disease. I conduct research to assess the risks of these possible complications in pediatric-cancer survivors. I also treat children and young adults with endocrine tumors, such as those affecting the thyroid, adrenal, and pituitary glands.

I lecture internationally about the long-term health effects of pediatric cancer treatment and also teach medical students and fellows. I am very involved in several professional organizations, including serving as a medical advisor to the Children’s Brain Tumor Foundation and The Children’s Cause, Inc. I review grants for the National Cancer Institute and the Lance Armstrong Foundation, as well as articles for several scientific journals. In 2000, I received an Outstanding Service Award from CancerCare.

It is satisfying for me to know that research I helped lead is now benefiting children being treated for cancer, minimizing their future risk of therapy-related problems. I find it very gratifying to see our patients not only survive their cancers but grow up to become adults who can lead productive, rewarding lives.

Awards and Honors

  • Castle Connolly: New York Magazine Top Doctors (2002
  • 2005-2018)


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.

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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. Sklar’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.