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An ad hoc committee of the North American Primary Care Research Group (NAPCRG) was appointed to develop a classification system for procedures in primary care. The committee developed and field tested a completely hierarchical four digit process code for primary care. It is hoped that with wide-spread use and further testing, the code will become a nucleus for an international companion volume to ICHPPC-2 (International Classification of Health Problems in Primary care, second edition). This first version is being made available to interested potential users at this time.

An ad hoc committee of the North American Primary Care Research Group (NAPCRG) was appointed to adapt the diagnosis clusters instrument for use with the International Classification of Diseases (ICD-9-CM) and the International Classification of Health Problems in Primary Care (ICHPPC-2). This article describes the development and testing of the final roster of 110 diagnosis clusters for family physicians. Almost 90 percent of all diagnoses recorded by family physicians in a variety of settings were included in the clusters. The diagnosis clusters can be used in the analysis of large databases and facilitate comparisons between different providers and practices.

Faculty members from four family medicine training programs participated in the production of a definitive conversion of the Royal College of General Practitioners Classification of Diseases as modified for use with problem-oriented medical records (RCGP) to the International Classification of Health Problems for Primary Care (ICHPPC). The method used to produce the conversion and the several problems encountered are described. A detailed translation with the appropriate ICHPPC equivalent for each RCGP diagnostic title and code number is provided.

Using a standard ambulatory coding system as a base, an index of 42 problem clusters encountered in family practice was developed by two Pennsylvania family practice residency programs. Comparisons of frequencies with which these index problems were encountered by physicians in the Family Practice Centers were used to identify the practice patterns of family practice residents and faculty. Analyses of these displays, while largely subjective, produced some interesting general and specific results. The initial study indicates that many problems known to be common in family practice are not identified as such by the physician. When this type of information can be simplified, it is welcomed and found useful by residents and faculty in family practice training programs. A simplified index can be developed and used by any physician without any special equipment.