A randomized trial was conducted to evaluate the combined impact of a physician reminder letter and a telephone contact on the use of Pap tests and mammograms in a low-income managed care program. Women 40 to 79 years of age who were past due for cancer screening were randomly assigned to an intervention or control group. Medical claims were reviewed after 6 months to determine intervention effectiveness. The odds of receiving all needed cancer screening tests during follow-up were four times higher in the intervention group. Women who reported having to take time off from work to see a doctor had lower odds of getting screened. (Am J Public Health. 1995; 85:834-836); Women who receive reminders by mail and telephone may be more likely to make routine screening appointments for Pap smears and mammograms. Researchers conducted inreach efforts among a low-income population of 659 women between 40 and 79 years old. Pap tests and mammography screening were covered services. A control group of 322 women received standard care and 337 women received letters signed by physicians and subsequent telephone calls by staff. The women who were reminded received 30 percent (%) of needed tests during the following six months, while controls received only 9.6% of identified cancer screening. One additional outcome was the reluctance of women to be tested if it involved time away from their jobs.