- Sleep DisordersHe was Director of the Newark Sleep Disorders Center (at Newark Beth Israel) from 1978 to 2008, during which period the center diagnosed and treated more than 3,000 patients.
- Bronchitis
- Pneumonia
- Internal MedicineDr. Karetzky is licensed by the states of New Jersey, New York, and New Hampshire. He is certified by the National Board of Medical Examiners with a specialty in internal medicine and subspecialties in pulmonary medicine, critical care medicine, geriatrics medicine, and sleep medicine. In November 2011, Dr. Karetzky was recertified in critical care medicine by the American Board of Internal Medicine. In 2013, Dr. Karetzky received the Diplomate Sleep Medicine by ABIM.
- Lung Cancer
- Insomnia
- Geriatrics