The International Classification of Primary Care is copyright property of the World Organization of Family Doctors (Wonca). Wonca is the international incorporated association of national colleges, academies or organizations concerned with the academic aspects of general/family practice. Beginning with 18 members in 1972, there are now 90 member organizations in 75 countries. This includes eight organizations in collaborative relations with Wonca. The total membership of the member organizations of Wonca is over 160,000 general practitioners/family physicians.

ICPC is supported internationally by the Wonca International Classification Committee. Local support is given by individual members of the Wonca International Classification Committee. Australia members include Dr Helena Britt and Dr Graeme Miller.

ICPC is maintained and updated by the International Classification Committee (WICC) of Wonca. The full revision cycle is currently 11 years however mapping to other classifications may be reviewed at shorter intervals to adjust for changes in other classifications and changed usage. WICC has been active since 1972 and currently has 40 members from 23 different countries. WICC is partially funded by Wonca and the participation of some members is supported by their national governments.

ICPC is available in both written and electronic form. ICPC is available in book form from Oxford University Press (OUP) on a print on demand basis. The Family Medicine Research Centre (FMRC) is the authorised distributor of ICPC-2 in Australia and the Pacific Basin in collaboration with the World Organisation of Family Doctors (Wonca). Electronic versions are available in Australia under licence from Wonca through the Family Medicine Research Centre.

A "one off" Wonca user site fee is payable to Family Medicine Research Centre, who pass the total payment on to Wonca at regular intervals. The monies received by Wonca will assist the Classification Committee in continuing its work in further developing classification systems (including ICPC-2) for general practice. This Wonca fee is not GST taxable.