Introduction: HIV-related stigma refers to prejudice, negative attitudes and abuse directed at people living with HIV (PLHIV) and interferes with both prevention and treatment efforts. This study was designed to examine drivers of HIV-related stigma among healthcare workers in health clinics in Hulu Langat, Selangor. Methods: This is a sin-gle-blinded, cluster randomised controlled trial (parallel groups). A total of 158 participants from the intervention group and 158 participants from the control group were randomised via balloting process at the cluster (clinic) level. A comprehensive self-administered questionnaire based on the stigma index tool was used. Data were analysed using IBM SPSS version 25 involving descriptive and bivariate analyses. The baseline results were analysed using the chi-square test and Mann-Whitney U test. Results: The response rate for the intervention group was 83.5% and 81.6% for the control group (82.3% combined response rate). Majority of the respondent’s age between 30 – 39 years old, female, nurses, have experience working with PLHIV and worked for 0 – 9 years in the healthcare setting. Comparison of total infection concern score (p = 0.001) and total willingness to treat key populations (KPs) score (p = 0.025) between intervention and control group at baseline were significant. However, comparison of total opinion/perception about PLHIV score, total knowledge about HIV score, total intention to stigmatise score and total health facility policies and guidelines score between intervention and control group at baseline showed no significant dif-ference. Conclusion: The significant difference between groups on certain scores above might be due to different job category between the two groups thus influence how willing they are in treating PLHIV. These findings may assist stigma reduction intervention programmes targeting healthcare providers in Hulu Langat, Selangor and ensure quality care for PLHIV.