Arturo Vargas Bustamante

Arturo Vargas Bustamante, PhD, MPP, is a senior fellow at the UCLA Center for Health Policy Research and a professor in the Department of Health Policy and Management at the UCLA Fielding School of Public Health. He also serves as faculty research director at the UCLA Latino Policy and Politics Institute. 

The primary focus of his research has been on health care access and utilization, particularly among Latinos/Hispanics and immigrants in the United States. He has also contributed to border and international health care research, as well as chronic care management research in primary care settings. Bustamante’s expertise lies in health care disparities, health policy, health services research, and program and policy evaluation. His research has been published in reputable health policy journals such as Health Affairs, Health Services Research, Social Science and Medicine, Medical Care, among others. His work has received funding from the National Institutes of Health (NIH), the Agency for Healthcare Research and Quality (AHRQ), the Robert Wood Johnson Foundation, the Commonwealth Fund, and various government funders and foundations.

Bustamante has a PhD in public policy. He also has a master's in public policy and a master's in economics from Berkeley. As part of his professional experience, he worked as a consultant for the Inter-American Development Bank and for the California Program on Access to Care. Prior to that, he worked for the Health Care Financing Administration of the Mexican Ministry of Health.

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Journal Article

Health Care Use Gaps by Citizenship Status Among Latino Adults Aged 26–49 in California Under a New Federal Immigration Environment

Since 2016, California has expanded Medi-Cal, the state’s Medicaid program, to include all income-eligible residents, regardless of immigration status. The most recent 2024 expansion extended coverage to adults aged 26–49. However, anti-immigration federal policies and a proposed state-level freeze on Medi-Cal enrollment for undocumented adults undermine these expansions. This study examines the association between citizenship/documentation status and health care use among adults ages 26–49 with incomes below 138% of the Federal Poverty Level, the eligibility threshold for Medi-Cal. It also explores differences in health care use between Latinos and non-Latinos. Using data from 2,384,944 adults in the 2018–2021 California Health Interview Survey (CHIS), the analyses employed multivariate logistic regression models with an interaction term between citizenship/documentation status and Medi-Cal enrollment to estimate utilization gaps.

Findings: Non-Green Card holders (non-GCH) with Medi-Cal had significantly higher odds of a doctor visit in the past year compared to citizens without Medi-Cal. Among Latinos, the interaction between Medi-Cal enrollment and non-GCH status was also statistically significant. These findings indicate that Medi-Cal may help undocumented individuals overcome barriers to accessing care, but federal and state policies undermine these advances.
 

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Journal Article

Public Benefit Avoidance And Safety Concerns Among Mixed-Status Latino Families In California, 2021–22

Many Latino immigrants avoid public benefits because of fears about their immigration status or that of family members, which is heightened by anti-immigration rhetoric. This study used data from the Latino Youth Health Study and the 2021–2022 California Health Interview Survey (CHIS) to examine decisions not to apply for noncash public benefits, such as Medicaid, food assistance, and housing subsidies, as well as safety perceptions among income-eligible Latino families in California. Authors also analyzed differences by parental citizenship and household language. 

Findings: Compared to families with two U.S. citizen parents, families with one or both noncitizen parents were more likely (by 38.4 and 46.7 percentage points, respectively) to avoid applying for benefits because of immigration-related concerns, and such families were also more likely to fear deportation for themselves or a family member or close friend. Spanish-only and bilingual households showed similar patterns. These findings underscore the need for accurate information on public benefit eligibility and immigration policies to ensure that immigrant families can access health care and resources to which they are legally entitled.

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Journal Article

Organizational Perspectives on the Public Charge Rule and Health Care Access for Latino Immigrants in California

In this qualitative study, authors aim to examine how mis- and disinformation about the Public Charge Ground of Inadmissibility final rule ("public charge rule") influences health care access for Latino immigrants in California. Between May 2024 and April 2025, primary data were collected from 32 interviews (38 participants) with healthcare and community-based organizational leaders serving Latino immigrants in California.

Findings: Participants identified the public charge rule as a significant barrier to health care access for Latino immigrants. The policy has discouraged many Latinos from accessing public benefits, particularly the state's Medicaid and Supplemental Nutrition Assistance Program. In addition, immigrants' trusted sources of information (e.g., family, friends, and attorneys) were often misinformed about the policy, which amplified confusion and fear. Organizations respond by providing accurate information and connecting individuals with reliable resources to clarify that using public benefits would not necessarily result in being classified as a public charge. However, most efforts focused on education rather than directly countering mis- and disinformation. 

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External Publication

External Publication

Latino Policy & Politics Institute Health and Climate Dashboard

The Latino Climate and Health Dashboard is a digital resource that provides county-specific fact sheets illustrating how Latino neighborhoods (has 70% or more Latino residents) in the state face heightened health and environmental risks. Each county has fact sheets on two topics: heat exposure and air pollution. Data for Latino neighborhoods is compared with data for non-Latino white neighborhoods (has 70% or more white residents).  

Heat exposure data include county-level demographic information that influences heat exposure and neighborhood information on recent (2018–2022) and projected (2035–2064) data on extreme heat days; barriers from or contributors to heat exposure; and vulnerable groups.  

Air pollution data include county-level demographic information that influences air pollution exposure and neighborhood information on exposure (2015–2017) to fine air particulate matter (PM 2.5) and diesel emissions; proximity to major air pollution sources, vehicle and traffic types; and vulnerable groups. 

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Journal Article

Journal Article

Public Benefit Avoidance And Safety Concerns Among Mixed-Status Latino Families In California, 2021–22

Many Latino immigrants avoid public benefits because of fears about their immigration status or that of family members, which is heightened by anti-immigration rhetoric. This study used data from the Latino Youth Health Study and the 2021–2022 California Health Interview Survey (CHIS) to examine decisions not to apply for noncash public benefits, such as Medicaid, food assistance, and housing subsidies, as well as safety perceptions among income-eligible Latino families in California. Authors also analyzed differences by parental citizenship and household language. 

Findings: Compared to families with two U.S. citizen parents, families with one or both noncitizen parents were more likely (by 38.4 and 46.7 percentage points, respectively) to avoid applying for benefits because of immigration-related concerns, and such families were also more likely to fear deportation for themselves or a family member or close friend. Spanish-only and bilingual households showed similar patterns. These findings underscore the need for accurate information on public benefit eligibility and immigration policies to ensure that immigrant families can access health care and resources to which they are legally entitled.

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Journal Article

Journal Article

Organizational Perspectives on the Public Charge Rule and Health Care Access for Latino Immigrants in California

In this qualitative study, authors aim to examine how mis- and disinformation about the Public Charge Ground of Inadmissibility final rule ("public charge rule") influences health care access for Latino immigrants in California. Between May 2024 and April 2025, primary data were collected from 32 interviews (38 participants) with healthcare and community-based organizational leaders serving Latino immigrants in California.

Findings: Participants identified the public charge rule as a significant barrier to health care access for Latino immigrants. The policy has discouraged many Latinos from accessing public benefits, particularly the state's Medicaid and Supplemental Nutrition Assistance Program. In addition, immigrants' trusted sources of information (e.g., family, friends, and attorneys) were often misinformed about the policy, which amplified confusion and fear. Organizations respond by providing accurate information and connecting individuals with reliable resources to clarify that using public benefits would not necessarily result in being classified as a public charge. However, most efforts focused on education rather than directly countering mis- and disinformation. 

Publication Placeholder
Journal Article

Journal Article

Health Care Use Gaps by Citizenship Status Among Latino Adults Aged 26–49 in California Under a New Federal Immigration Environment

Since 2016, California has expanded Medi-Cal, the state’s Medicaid program, to include all income-eligible residents, regardless of immigration status. The most recent 2024 expansion extended coverage to adults aged 26–49. However, anti-immigration federal policies and a proposed state-level freeze on Medi-Cal enrollment for undocumented adults undermine these expansions. This study examines the association between citizenship/documentation status and health care use among adults ages 26–49 with incomes below 138% of the Federal Poverty Level, the eligibility threshold for Medi-Cal. It also explores differences in health care use between Latinos and non-Latinos. Using data from 2,384,944 adults in the 2018–2021 California Health Interview Survey (CHIS), the analyses employed multivariate logistic regression models with an interaction term between citizenship/documentation status and Medi-Cal enrollment to estimate utilization gaps.

Findings: Non-Green Card holders (non-GCH) with Medi-Cal had significantly higher odds of a doctor visit in the past year compared to citizens without Medi-Cal. Among Latinos, the interaction between Medi-Cal enrollment and non-GCH status was also statistically significant. These findings indicate that Medi-Cal may help undocumented individuals overcome barriers to accessing care, but federal and state policies undermine these advances.
 

Center in the News

Lawfully present immigrants help stabilize ACA plans: Why does GOP want them out?

Arturo Vargas Bustamante, senior fellow at the UCLA Center for Health Policy Research, was quoted in this story about lawfully present immigrants who are enrolled in Obamacare health plans who will lose their insurance subsidies because of the new federal tax and spending law.

News https://daltoncitizen.com/2025/10/18/lawfully-present-immigrants-help-stabilize-aca-plans-why-does-gop-want-them-out/

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Center in the News

Regional: New study on Latino Californians reveals health care obstacles

Using data from the California Health Interview Survey and other sources, the California Health Care Foundation released the 2025 California Latino Health Almanac. Arturo Vargas Bustamante, senior fellow at the UCLA Center for Health Policy Research, was quoted in an article about the almanac. News https://www.sfgate.com/news/bayarea/article/regional-new-study-on-latino-californians-21066341.php

Center in the News

Lawfully present immigrants help stabilize ACA plans. Why does the GOP want them out?

UCLA Center for Health Policy Research Senior Fellow Arturo Vargas Bustamante was quoted in this column about how immigrants bolster the strength of health insurance marketplace plans. News https://californiahealthline.org/news/article/column-covered-california-immigrants-stabilize-aca-marketplace-trump-health-policy/

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Paul Torrens Health Forum: A Tribute to Jerry Kominski — Healthcare Reform in California & the Nation

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