Code used to indicate the disease had by or the condition of a person.

Code indicating the treatment activity related to a health condition of a person.

Code indicating the date format, time format, or date and time format.

Expression of a date, a time, or range of dates, times or dates and times.

HC04 refers to the date the disease or condition was first encountered.

Code indicating a Yes or No condition or response.

HC05 indicates if the disease or condition has been resolved. A ``Y'' indicates the disease or condition has been resolved, an``N'' indicates the disease or condition has not been resolved.