Although the concept of person-centered services has gained much popularity, there are significant discrepancies in the extent to which service agencies are actually implementing it. Eight organizations, each of which was successfully providing person centered services to at least some individuals, were examined. Some agencies were implementing the approach with significantly higher proportions of individuals receiving their services than were others. Interviews and participant observations were used to examine how the various organizational contexts contributed to these differences. Some organizations were found to be well-suited to the approach, whereas others posed significant limitations to the number of individuals who benefited or the rate at which they were likely to benefit from this approach.