Optimization of interdisciplinary team-based care is an important strategy to improve home health care for older adults. An electronic, shared care plan was designed with aim to support shifts toward greater client and family involvement and interdisciplinary team functioning. Content for the home health collaborative care plan (HHCCP) was determined through a review of existing care plans, engagement with client and family partners, and usability testing by home health clinicians using a paper prototype. Client and family consultation and usability testing led to the identification of new and unique requirements for the HHCCP. We provide an example of how a paper prototype was used to validate and determine additional requirements for electronic clinical documentation and conclude that end users should be involved in the design of electronic clinical documentation as early as possible.