Medicare Advantage networks offer limited access to racially or ethnically concordant physicians

The first study to evaluate the racial and ethnic diversity of physicians in private insurance networks contributes to the larger conversation about diversity in the physician workforce.

Newly released data from the Association of American Medical Colleges shows a double-digit drop in the enrollment of Black, Hispanic and Native American students in medical schools, a trend that follows the Supreme Court’s 2023 decision to ban the consideration of race in admissions. This decline deepens an already significant structural disparity in the U.S., where Black and Hispanic physicians represent just 5% and 6% of the medical workforce, respectively.

How does this disparity impact health care quality? Research shows that patients are more likely to follow medical recommendations when their providers share similar personal and cultural backgrounds. Diversity also improves patient satisfaction, trust and communication between patient and provider, while encouraging broader perspectives in medical research. Importantly, racially diverse doctors are more likely to work in underserved communities, providing care to uninsured individuals and Medicaid beneficiaries. When providers do not mirror their patient populations, these outcomes are less likely to occur. 

A team of researchers from the Brown University School of Public Health has published a study examining an additional barrier to receiving care from racially or ethnically concordant physicians: Medicare Advantage (MA)—the privately run segment of Medicare that enrolls Black and Hispanic patients at disproportionately higher rates—and the restrictions it often places on the network of available providers. 

Associate director of Brown’s Center for Advancing Health Policy through Research David Meyers co-led the research with Professor Amal Trivedi

Led by David Meyers, associate director of Brown’s Center for Advancing Health Policy through Research and assistant professor of health services, policy and practice, and Dr. Amal Trivedi, professor of health services, policy and practice and of medicine at Brown, the team evaluated the availability of Black and Hispanic primary care physicians for MA enrollees and compared it to the broader pool of physicians practicing in the same counties. Their emphasis on primary care is rooted in strong evidence showing that Black patients who receive primary care from Black physicians are more likely to access critical preventive services.

Here’s what they found: One in five Black and Hispanic individuals in Medicare Advantage plans had no access to Black or Hispanic doctors in their network. Roughly four out of ten counties lacked Black doctors in Medicare Advantage networks, and nearly half of all counties had no Hispanic doctors available. MA plans also included a smaller percentage of Black and Hispanic physicians compared to white physicians. 

“Medicare Advantage plans often limit provider networks, which may restrict access to racially or ethnically concordant physicians, and that is essentially what we found in this study,” said Trivedi. “While 51% of white physicians in a given Medicare Advantage enrollee's county were included in the MA network, the inclusion rates were lower for Black and Hispanic physicians. Specifically, only 43% of Black physicians and 44% of Hispanic physicians practicing in the same counties were included.”   

To improve access to concordant care, researchers suggest that Medicare Advantage insurers increase the racial and ethnic diversity of their contracted physicians. Physician networks should reflect the demographics of the local population to promote equitable representation.

Researchers also recommend that Medicare evaluate network adequacy by tracking both physician diversity and language concordance. Increasing the availability of Spanish-speaking physicians could help Hispanic beneficiaries with limited English proficiency access culturally competent care.

“We focused on Medicare Advantage partly because these plans are growing rapidly,” Trivedi said. “Over half of all Medicare beneficiaries are now enrolled in them. This growth is especially pronounced among Black, Hispanic and low-income populations, making it critical to address disparities within the system.”

Some insurers had notably less diverse networks than others, which raises questions about the factors driving these differences.

Amal Trivedi Professor of Health Services, Policy and Practice and of Medicine
 
man posing for photo

Trivedi notes that not all MA plans are alike, with some parent companies offering more inclusive networks than others. “We observed significant variation in network diversity by geography and insurer,” he said. “Some insurers had notably less diverse networks than others, which raises questions about the factors driving these differences.”

This study–the first to evaluate the racial and ethnic diversity of physicians in private insurance networks–contributes to the larger conversation about diversity in the physician workforce. “The implications may extend to other managed care models, such as Medicaid or commercial care plans,” Trivedi said. “Future research could explore how physician network diversity affects access and outcomes in these programs.”