This study evaluated the quality of primary care services provided in 15 National Centers of Excellence in Women's Health (CoE) clinical sites in operation in 2001 using self-reported clinical preventive services and patient satisfaction as indicators of quality of care. A sample of 3,111 women served by the CoE program was surveyed and compared with quality of care benchmarks from national and local community surveys. The benchmark surveys were: a nationally representative sample of 2,075 women from the 1998 Commonwealth Fund Survey of Women's Health; a community sample of women who lived within a geographical catchment area for three CoEs; and a sample of 71,438 women in the 1999 Consumer Assessment of Health Plans Study (CAHPS) of commercial managed care plans. Adjusting for region, age, education, perceived health status, and managed care enrollment, women in the CoEs were more satisfied with their care and had received significantly more screening tests and counseling services than women in the benchmark samples. The largest effects among primary care services were for physical breast examination, mammogram (ages 50+), and counseling for smoking, domestic violence, and sexually transmitted diseases.