OBJECTIVES:  To estimate the time to and rates of health plan disenrollment for rheumatoid arthritis (RA) patients compared with a matched group of non-RA patients. METHODS: RA patients (≥18 years) were identified from the HealthCore Integrated Research Database (HIRD) and matched to non-RA patients using exact 1-to-1 matching according to demographic characteristics, primary policy holder status, ACA plan, and length of pre-index enrollment. Patients were identified as having RA if they had ≥1 claim with a diagnosis of RA and ≥1 claim with DMARD use. Non-RA patients were those who did not meet the criteria for RA. Index date for RA cases was the earliest date at which they met the criteria for RA during 1/1/2007-12/31/2014. Non-RA patients were assigned same index date as their matched RA case. All patients were required to have 12 months of pre-index enrollment. RESULTS: