To help reach the UNAIDS 95-95-95 targets by 2025, the public health community must ensure that people living with HIV have access to antiretroviral therapy (ART). Access to this lifesaving medication is one issue; staying on it is another, because continuing ART is not always possible due to a variety of circumstances. In a project FHI 360 recently concluded in Nigeria, we demonstrated how machine learning can complement the efforts of health care workers to help people stay on ART.