In response to the existing health equity gap for communities of color, which the pandemic exacerbated, this collaboration tackled the challenge of increasing COVID-19 vaccination rates and improving health equity among Latina/x/o individuals of childbearing age in southern Arizona. Partnering with the local health department and a diverse Community of Practice, our team employed a Human-Centered Design approach to co-create and pilot solutions that address critical health needs and strengthen patient-practitioner trust. Our year-long design process led to the successful implementation of a community and a clinical pilot that enhanced healthcare navigation and engagement for our primary users, with early outcomes showing positive impacts on the local healthcare system. This experience underscores the power of creating space for cross-disciplinary collaboration and offers valuable insights into integrating equity-focused practices within service design. Attendees will learn about the effectiveness of coalition-based approaches and strategies for broadening service design practices to address complex health equity issues affecting diverse, low income communities.