High Quality Content by WIKIPEDIA articles! The International Classification of Primary Care (ICPC) is a classification method for primary care encounters. It allows for the classification of the patient’s reason for encounter (RFE), the problems/diagnosis managed, primary or general health care interventions, and the ordering of the data of the primary care session in an episode of care structure. It was developed by the WONCA International Classification Committee (WICC), and was first published in 1987 by Oxford University Press (OUP). A revision and inclusion of criteria and definitions was published in 1998. The second revision was accepted within the World Health Organization`s Family of International Classifications.