OBJECTIVES: Osteoporosis and chronic inflammatory rheumatic diseases (CIRD), including rheumatoid arthritis (RA), psoriatic arthritis (PA) and ankylosing spondylitis (AS), are major issues in rheumatology. In these two therapeutic areas, data are needed to describe  burden of disease and clinical management. Our objective was to identify patients likely to have osteoporosis or CIRD within French claims database, before running analyses. METHODS: As there is no diagnosis code in the database, treatment pattern or medical resource utilization were used to identify patients. Patients with osteoporosis were identified using age (≥50), reimbursement of anti-osteoporotic agents (ATC codes), osteoporosis-related hospitalization, or Long Term Disease (LTD) status, based on ICD-10 codes. For CIRD, the study population included 3 sub-groups: patients with RA, PA and AS. For AS, identification was based on hospitalizations and LTD status for ICD-10 codes M08.1, M08.8, M08.9, M45, and M46. Identification for RA was based on ICD-10 codes M05, M06, M08.0, M08.2, M08.4 and M13. Identification for PA was based on ICD-10 codes M07 and M09. RESULTS: Identification criteria for osteoporosis allowed to identify 7,939 patients, corresponding to 4.5% of the French population ≥50 years. This population consists of 92% of women and mean age is 71.6 years. Identification criteria selected 2,070 for RA, 923 patients for SA, and 492 patients for RP, corresponding to 3,223 patients with CIRD disease (0.62% of French population) CONCLUSIONS: