Patients and families with limited English proficiency (LEP) face barriers to health care service access, experience lower quality care, and suffer worse health outcomes. LEP is an independent driver of health disparities and exacerbates other social determinants of health. Disparities due to language are particularly unjust because LEP is morally irrelevant and a source of unfair, unnecessary disadvantage. Clinicians and health care organizations have duties to intervene, which this article describes. To claim one AMA PRA Category 1 Credit TM for the CME activity associated with this article, you must do the following: (1) read this article in its entirety, (2) answer at least 80 percent of the quiz questions correctly, and (3) complete an evaluation. The quiz, evaluation, and form for claiming AMA PRA Category 1 Credit TM are available through the AMA Ed Hub TM. Case Dr J is a second-year emergency department (ED) resident physician who, during an unusually busy shift, sees MM, a 13-year-old girl, accompanied by her father; this is their third visit to the ED this week. MM, rubbing her belly, appears somewhat uncomfortable but in no apparent distress. After 15 minutes of fumbling with an interpreter via phone, Dr J realizes that MM and her father speak a language or dialect not available via the interpreter phone service. The 3 navigate a broken English dialogue that seems to reveal that, for 5 days, MM has had decreased appetite and abdominal pain, which was most severe yesterday and since then has improved. Dr J's physical examination of MM reveals mild, diffuse, nonspecific abdominal tenderness that seems most consistent with acute gastroenteritis. Dr J leaves MM's room and confers with Dr C about a treatment plan. Dr J returns to MM, suggesting she take acetaminophen for pain, and arranges for MM's discharge from the ED before moving on to another patient. Two days later, MM returns to the ED with an abdominal abscess from a ruptured appendix, in septic shock, and requiring urgent surgical intervention. Dr J wonders what she might have done differently.