DOD meaning in Medical ?

A death anniversary (or deathday) is the anniversary of the death of a person. It is the opposite of birthday. It is a custom in several Asian cultures, including Azerbaijan, Armenia, Cambodia, China, Georgia, Hong Kong, Taiwan, India, Myanmar, Iran, Israel, Japan, Bangladesh, Korea, Nepal, Pakistan, the Philippines, Russia, Sri Lanka and Vietnam, as well as in other places with significant overseas Chinese, Japanese, Jewish, Korean, and Vietnamese populations, to observe the anniversary on which a family member or other significant individual died. There are also similar memorial services that are held at different intervals, such as every week.

Although primarily a manifestation of ancestor worship, the tradition has also been associated with Confucianism and Buddhism (in East Asian cultural civilizations) or Hinduism and Buddhism (South Asia but mainly in India, Nepal and Sri Lanka and Southeast Asia). In Judaism (the majority religion of Israel), such a commemoration is called a yahrtzeit (among other terms). Celebration of mass in memory of a loved one on or near the anniversary of their death is also a part of Roman Catholic Christian tradition.