Annual chlamydia trachomatis screening of all sexually active women younger than age 26 is a recommended standard practice. Yet most women are not being tested. The author describes a successful practice change intervention to increase routine chlamydia screening rates in a women's health primary care setting. Screening rates increased from 53.4% to 76.1% following the intervention. Results suggest a combination of education, provider feedback, and clinic prompts can influence chlamydia screening behavior among providers.