This article reviews the literature on the transdisciplinary approach to early intervention services and identifies the essential elements of this approach. A practice model describing the implementation of the approach is then presented, based on the experiences of staff members in a home visiting program for infants that has been in existence for over 30 years. The benefits and challenges experienced by therapists and managers of the program are considered, along with the unique aspects of the program and implications for program management. The managerial and team resources required to successfully implement a transdisciplinary model are high, but the potential payoffs for children, families, and therapists' development of expertise are considerable. (Contains 1 figure and 1 table.)