The purpose of this study is to determine the long term safety, tolerability, and effectiveness of ABT-494 in patients with RA, who have completed a preceding ABT-494 study

If you agree to be in this study, you will undergo some activities, tests and evaluations to determine if you are eligible for this study. Such tests and evaluations are completed before study participation during the Last Visit of the M13-550 or M13-537 study, which is the same as Week 0 (Day 1) of this study. If you are eligible to participate in this study, you will undergo the procedures listed below. Please note that the Week 0 (Day 1) procedures are already being done for the Last Visit of the M13 550 or M13 537 study.