I partnered closely with product, engineering, and support to move quickly while maintaining quality. Using realistic scenarios and dummy accounts, I led user interviews and usability testing to uncover workflow friction under privacy constraints. I shaped and refined solutions through low- and high-fidelity wireframes, clarifying navigation, hierarchy, and decision points, while acknowledging that these screens evolved before the final interactive prototype. Iterative validation of navigation, search, and visit-preparation flows reduced uncertainty and improved member confidence before visits. I also mentored junior designers by reviewing their contributions, sharing design rationale, and guiding them through cross-functional collaboration. Regular stakeholder reviews allowed me to align teams and reduce downstream risk. The mid- and high-fidelity screens illustrate design iterations, and the interactive prototype demonstrates the final patient options flow, guiding members from provider selection through visit details and available care choices.