Increasing the proportion of newly diagnosed colorectal cancer (CRC) patients and women with a family history of breast and/or ovarian cancer who receive recommended genetic services are clinical and public health priorities (Bowen, Kolor, Dotson, Ned, & Khoury, 2012; US HHS, 2019). In both cases, genetic testing can identify individuals with highly penetrant familial risk factors, for example, Lynch syndrome (LS) and hereditary breast and ovarian cancer (HBOC), which warrant specialized cancer prevention and treatment approaches (NCCN, 2017, 2019). Population-based delivery models, where screening and indicated genetic services are systematically provided to a defined patient group, have been recommended for both LS and HBOC. Specifically, in 2009 the Evaluation of Genomic Applications in Practice and Prevention (EGAPP) working group recommended that all CRC patients have reflex tumor testing to identify mismatch repair (MMR) deficiency with subsequent germline genetic testing, and in 2013, the United States (US) Preventive Services Task Force (USPSTF) (EGAPP