Despite focusing on different strategies for managing chronic pain, both Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT) aim to increase adaptive coping and improve quality of life. Limited existing literature suggests that CBT and ACT for chronic pain result in comparable improvements, yet it is unclear whether CBT also inadvertently reinforces acceptance. The current study evaluated the effect of a CBT group intervention on pain-related acceptance and secondary measures of adaptive coping in Veterans with chronic pain. A total of 50 Veterans with mixed, idiopathic, chronic pain participated in a 12-week, CBT for pain group intervention at a Midwestern VA Medical Center between November 13, 2012 and October 23, 2014. Paired-samples t-tests were conducted to evaluate the effect of the intervention on the outcome variables from baseline to post-treatment. At post-treatment, Veterans reported significantly greater pain-related acceptance, increased self-efficacy for pain management, and internal health locus of control. However, there were no significant changes witnessed in chance health locus of control, neither psychological nor environmental quality of life, and in illness perception. Outcomes of the present study support the notion that CBT's focus on modifying maladaptive behaviors may inadvertently increase acceptance of chronic pain via decreased behavioral avoidance.