Although all Asian Americans and Pacific Islanders are often counted together as one minority, they are an extremely diverse group. These ethnic subgroups vary not only by national origin, but also by language, culture, socioeconomic status, citizenship and refugee status, the circumstances of immigration, and how long their families have lived in the United States. Some of these ethnic subgroups have recent immigration histories and stronger ties to their Asian culture, while others have substantial numbers of at least third generation Americans. This gradient of acculturation is significant because both culture and language affect health in many ways, including individual health practices and a person’s ability to navigate in the American health system.