Variation in Usual Source of Care in Asian American, Native Hawaiian, and Other Pacific Islander Adult Medicaid Beneficiaries.

BACKGROUND: Disparities in access to care between non-Hispanic White and Asian American, Native Hawaiian, and Pacific Islander (AANHPI) patients are often attributed to higher uninsurance rates among AANHPI patients. Less is known about variation among individuals with Medicaid health insurance coverage and among AANHPI subgroups. OBJECTIVE: The objective of this study was to examine differences in access to care between White and AANHPI adult Medicaid beneficiaries, both in the aggregate and disaggregated into 9 ethnic subgroups (Asian Indian, Chinese, Filipino, Japanese, Korean, Vietnamese, Other Asian, Native Hawaiian, and Pacific Islander). RESEARCH DESIGN: Nationwide Adult Medicaid Consumer Assessment of Healthcare Providers and Systems data (2014-2015), a cross-sectional survey representative of all Medicaid beneficiaries. SUBJECTS: A total of 126,728 White and 10,089 AANHPI Medicaid beneficiaries were included. MEASURES: The study outcomes were: (1) having a usual source of care; and (2) reporting a health center or clinic as the usual site of care. Multivariable linear probability models assessed the relationship between race/ethnic subgroup and our outcomes, adjusting for sociodemographic characteristics and health status. RESULTS: Compared with White beneficiaries, Korean beneficiaries were significantly less likely to report having a usual source of care [difference=-8.9 percentage points (PP), P =0.01], and Chinese (difference=8.4 PP, P =0.001), Native Hawaiian (difference=25.8 PP, P <0.001), and Pacific Islander (difference=22.2 PP, P =0.001) beneficiaries were significantly more likely to report a health center or clinic as their usual site of care. CONCLUSIONS: Despite similar health insurance coverage, significant differences in access to care remain between White and AANHPI Medicaid beneficiaries. Disaggregated AANHPI data may reveal important variation in access to care and inform more targeted public policies.