The Medical health IC card should allow consistent, complete management of a patient's medial information across different medical centers. Even though many medical institutions are researching on a medical health IC card, as yet no standard is determined for the items that should be stored in the cards. Since there are no standards for the items, the use of the card is limited and confined within specific hospitals or regions. In this paper, we investigated various standardized items adopted in the medical health IC card and how they are actually stored in a card. We proposed a storage mechanism that categorizes each item into 3 hierarchical classes: the Global class, the Interest class, and the Detail class. In addition, the memory file system for the medical health IC card was also designed to conform to the international standards. The proposed memory file system can store the standard item within the limited memory capacity of IC cards. The memory file system also facilitates selective storage mechanism to save memory space by allowing only the selected items can be stored as needed. That is, except the information needed for the security purpose, all other items can be selectively stored as needed. Therefore, it is necessary that application programs accessing the medical health IC card must provide means of security.