This project aims to evaluate different approaches to increase Hepatitis C screening among primary care patients at Penn Medicine through a centralized screening outreach program. In a pragmatic trial, we will evaluate different approaches to increase completion of screening among eligible patients, including changing the default from opt-in to opt-out and incorporating behavioral science principles into the outreach communication.

The hepatitis C virus (HCV) is the leading cause of liver transplant and hepatocellular carcinoma in the US. New direct-acting antivirals are available that can eradicate the disease in over 95% of those that are treated, with minimal side effects. As a result of new therapies and a five-fold higher risk among baby boomers, the US Preventive Services Task Force and CDC now recommend HCV screening for all patients born between 1945 and 1965. Of the estimated 3.2 million people chronically infected with HCV, about 75% were born during this time frame. Despite this, national rates of screening among this group remain low at less than 30%. If more people could get screened, we could potentially identify more undiagnosed disease and help navigate to treatment.

At Penn Medicine primary care practices, HCV screening rates have risen from 37% in 2014 to 61% in 2017, likely from a combination of provider educational efforts and EHR alerts. There is also significant practice variation ranging from 4% to 99% screening rates. While EHR alerts have been shown to increase HCV screening rates, there is potential to complement this with direct outreach to patients homes, as has been incorporated into cancer screening initiatives. Additionally, there is a mandate from the state of Pennsylvania requiring health care providers to offer HCV testing to all primary care patients. There is an opportunity to provide direct outreach to all eligible primary care patients at Penn Medicine, while also evaluating different approaches to increasing HCV screening rates.

Insights from behavioral science have been shown to increase participation in health promoting behaviors in a variety of ways. Switching from opt-in to opt-out framing has been shown to triple patient participation in remote monitoring and CRC screening. Additionally, messaging that incorporates social norms, reciprocity, and precommitment have also been shown to increase participation. However, it is not clear how these approaches would translate to HCV screening.

Inclusion Criteria:

• at least 2 visits to primary care provider within 2 years
• born between 1945 and 1965

Exclusion Criteria:

• have had 1 HCV antibody test, viral load test or are considered up-to-date on HCV screening by health maintenance