Abstract OBJECTIVES Evaluate reliability and validity of an adapted Commissioning for Quality in Rheumatoid Arthritis (RA)-RA-Patient Reported Experience Measure (CQRA-RA-PREM) for assessing care experience in an Australian rheumatology outpatient cohort. METHODS Individual patient interviews were performed to check the language and completion time of the CQRA-RA-PREM before modification. Australian Rheumatology Association Database (ARAD) participants completed the CQRA-PREM-Australian version (CQRA-PREM-AU) (22 items, 5 domains), disease activity measure (RAPID-3, BASDAI), Assessment of Quality of Life (AQOL-6D) index. Exploratory Factor Analysis (EFA) assessed item correlation. Cronbach’s alpha assessed internal consistency. RESULTS Individual patient interviews (n = 8, 62% male, mean age 50 years, mean disease duration 4.5 years) informed CQRA-RA-PREM modification. ARAD survey response rate was 707/1124 (63%); 459 (65%) RA, 134 (19%) Psoriatic Arthritis (PsA), 114 (16%) Ankylosing Spondylitis (AS); 67% female, mean age 62 years, mean disease duration 22 years. Median instrument completion time: 299 s (IQR 130). Scoring of responses allowed an averaged, overall score. EFA extracted 5 factors: all items loading similarly onto factor 1, indicating validity of the overall score. CQRA-PREM-AU score correlated with AQOL-6D score (rho-0.23, p < 001); partial correlation with disease activity was not significant (rho = 0.03, p = 0.45), indicating divergent validity. Reliability was comparable across disease subgroups (Cronbach’s alpha >0.94). Mean overall score did not differ by disease subgroup (4.1, SD 0.6, p = 0.73) and there was no floor/ceiling effect. CONCLUSION CQRA-PREM-AU, adapted to the Australian setting, is a valid and reliable instrument to measure self-reported care experience in Australian rheumatology patients, and may be interpreted as an average overall numerical score.