Bachelor of Science, City University of New York, 1943. Doctor of Medicine, New York University College Medicine, 1948.
Assistant chief medical examiner United States Navy, 1950-1954. Medical director Orentreich Medical Group, New York City, since 1953. Director Orentreich Foundation for the Advancement of Science, New York, since 1961.
Head of hair clinic, skin & cancer unit New York University Medical Center, 1953-1968. Member board directors Animal Medical Center, New York City, 1994, clinical professor dermatology New York University School Medicine, 1996.
Fellow American College of Physicians. Member American Society for Dermatologic Surgery (president 1970-1972), American Federation for Aging Research, American Academy Cosmetic Surgery, American Contact Dermatology Society, Endocrine Society, Skin Pharmacology Society, Skin Pharmacology Society.
Married Roslyn Orentreich, June 22, 1946. Children: Catherine Orentreich, David S. Orentreich, Sari Massachusetts.