Since ICF is a helpful tool for setting goals and documenting patients' rehabilitation progress, Moorheilbad Harbach Gesundheits- & Rehabilitationszentrum (MoHa) decided to create an online system for documentation by using ICF as a basis. This document aims to present a step-by-step guideline on how to implement an online ICF documentation system by providing insights into the general information, actions, documentation, and evaluation that is needed to develop such a project in a different organization. It should inspire other organizations to start a similar approach by sharing general guidelines about the implementation process. Additionally, the advantages of the use of a documentation system are pointed out as well as obstacles one has to keep in mind.