Institutional discrimination matters. The purpose of this longitudinal community‐based participatory research study was to examine institutional procedural discrimination, institutional racism, and other institutional discrimination, and their relationships with participants' health during a maternal and child health program in a municipal initiative. Twenty participants from nine multilingual, multicultural community‐based organizations were included. Overall reported incidences of institutional procedural discrimination decreased from April 2019 (18.6%) to November 2019 (11.8%) although changes were not statistically significant and participants reporting incidences remained high (n = (...) 15 in April and n = 14 in November). Participants reported experiencing significantly less “[when] different cultural ways of doing things were shared, the project did not support my way” from April 2019 (23.5%, n = 4) to November 2019 (0%, n = 0), Wilcoxon signed‐rank test Z = −2.00, p < 0.05. Some participants reported experiencing institutional racism (29.4%, n = 5) and other institutional discrimination (5.9%, n = 1). Participants experiencing institutional racism, compared to those who did not, reported a higher impact of the Initiative's program on their quality of life (t = 3.62, p < 0.01). Participatory survey designs enable nurse researchers to identify hidden pathways of institutional procedural discrimination, describe the impacts experienced, and examine types of institutional discrimination in health systems. (shrink)