LAUSR

Key Points Question Is primary care physician (PCP) exposure to a patient with a new breast or colorectal cancer diagnosis associated with increases in cancer screenings for other patients who subsequently visit the affected PCP? Findings In this cohort study of 3158 PCPs caring for 1 920 189 patients, using stacked difference-in-differences analyses, there were rapid and sustained increases in cancer screening rates for patients visiting PCPs who were recently exposed to new cancer diagnoses, for both breast cancer and colorectal cancer. Meaning These findings suggest that PCPs’ exposures to new diagnoses of cancer are associated with significant, sustained increases in cancer screening rates for other patients subsequently visiting the exposed PCPs.