This paper reviews a sign language planning project conducted in Australia with deaf Auslan users. The Medical Signbank project utilised a cooperative language planning process to engage with the Deaf community and sign language interpreters to develop an online interactive resource of health-related signs, in order to address a gap in the health lexicon of Auslan. The goal of this paper is to evaluate the outcome of the bottom-up language planning model that was used in this context, and to make recommendations for similar future sign language planning projects.