Primary Care Health Professional Shortage Research Articles

For the rural curious: mixed methods evaluation of a rural pharmacy practice elective

BackgroundAs of 2020, 20% of people residing in the United States of America (U.S.) lived in rural communities. Despite rural residents tending to be older, poorer, and having greater disease burden than their urban counterparts, the number of rural primary care providers continues to decline. Nearly 66% of U.S. Primary Care Health Professional Shortage Areas are designated as rural. Pharmacists can help address this shortage of rural primary care providers, often serving as providers of first-contact care; however, only 12% of U.S. pharmacists practice in rural communities. To help address this gap, in 2022 an elective Rural Pharmacy course was created at the University of Minnesota College of Pharmacy by a faculty member who has rural practice experience.MethodsThe course combines formal lectures, guest presentations by rural pharmacists and student interviews with additional rural pharmacists. For the 42 students enrolled in the course in 2022 and 2023, non-parametric statistics were used to compare the percentage of students who were raised in rural communities or who otherwise had extensive exposure to rural, and compare student interest ratings (1 to 7) about practicing/living rural at the beginning and end of the course. Students also wrote end-of-course reflection papers, commenting on the course and their interviews with rural pharmacists.ResultsAcross both years, 45% of the enrolled students had previous experience in rural communities. The net change in Rural Interest scores among students completing both questionnaires was + 5 in 2022 and + 2 in 2023, both non-significant differences. The largest shifts in student interest were from “Not Sure” at the start of the course to “Interested” or “Not Interested” at the end of the course, and from “Interested” to “Very Interested.” In their reflection papers nearly 60% of students reported being most impressed by their interviews with rural pharmacists.ConclusionsA course addressing the benefits and challenges of practicing pharmacy in rural communities was well-received by pharmacy students. Even students who have little interest in living in a rural community can benefit from being introduced to rural culture, enabling them to provide more culturally-responsive care for patients from rural communities.

Abstract 998: Pursuing leadership in literacy to ameliorate head and neck cancer disparities

Abstract Overview of Proposed Research. Head and neck cancers are a deadly cancer that ranks among the six most common cancers worldwide. (American Cancer Society, 2021). Studies have shown greater disease burden among minority populations for head and neck cancer, higher mortality rates and lower oral cancer knowledge, but limited evidence has defined the underlying causes of late stage diagnoses and access to the healthcare system (Suzuki et al, 2019). More specifically, in comparison to the national rates, South Carolina is among the top ten for head and neck cancers (Community Outreach, Hollings Cancer Center, MUSC, 2019). Dental and primary care play a critical role delivering quality patient education, prevention, risk reduction and treatment regimes. However, there is a paucity of information published on the value of designing and implementing a health literacy program to prioritize head and neck cancer screening and prevention. Rural communities face unique challenges to achieving optimal oral health, impacted mainly by geographic location and socioeconomic status (IOM&NRC, 2011). More specifically, rural southern states such as SC continues to have a tremendous shortage of primary care providers. SC currently has 44 of 46 counties designated as geographic Primary Care and Dental Health Professional Shortage Areas and approximately 25% of SC citizenry are living in rural areas (HRSA, 2018). Because the vast majority of the state has challenges with availability of primary care and dental providers, this potentially exacerbates access to care inequities for rural and underserved minority populations. To enhance the quality and equity of oral cancer prevention in rural SC, it is critical that we prioritize strategies to elevate the significance of head and neck cancer risks. Therefore, the need to design and deliver innovative strategies to increase opportunities that intersect the healthcare system and community is inevitable. In this regard, we propose PULL A-HEAD, Pursuing Leadership in Literacy to Ameliorate HEAd and neck cancer Disparities. PULL A-HEAD is aimed to develop and implement a community-centered approach design for increasing the health literacy and efficacy of navigating the healthcare system for early detection of head and neck cancers. In this presentation we will share outcome and impact results of a community-centered, health literacy program in collaboration with our Regional Medical Library - Region 2 (RML2), National Library of Medicine partners at the Medical University of South Carolina. The program (i.e. PULL A-HEAD) will emphasize the delivery of health literacy education and health systems navigation tools to improve the early detection of head and neck cancers. Citation Format: Joni D. Nelson, Irene M. Lubker. Pursuing leadership in literacy to ameliorate head and neck cancer disparities [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 998.

Ten-Year Outcomes: Community Health Center/Academic Medicine Partnership for Rural Family Medicine Training.

The widening gap between urban and rural health outcomes is exacerbated by physician shortages that disproportionately affect rural communities. Rural residencies are an effective mechanism to increase physician placement in rural and medically underserved areas yet are limited in number due to funding. Community health center/academic medicine partnerships (CHAMPs) can serve as a collaborative framework for expansion of academic primary care residencies outside of traditional funding models. This report describes 10-year outcomes of a rural training pathway developed as part of a CHAMP collaboration. Using data from internal registries and public sources, our retrospective study examined demographic and postgraduation practice characteristics for rural pathway graduates. We identified the rates of postgraduation placement in rural (Federal Office of Rural Health Policy grant-eligible) and federally designated Medically Underserved Areas/Populations (MUA/Ps). We assessed current placement for graduates >3 years from program completion. Over a 10-year period, 25 trainees graduated from the two residency expansion sites. Immediately postgraduation, 84% (21) were in primary care Health Professional Shortage Areas (HPSAs), 80% (20) in MUA/Ps, and 60% (15) in rural locations. Sixteen graduates were >3 years from program completion, including 69% (11) in primary care HPSAs, 69% (11) in MUA/Ps, and 50% (5) in rural locations. This CHAMP collaboration supported development of a rural pathway that embedded family medicine residents in community health centers and effectively increased placement in rural and MUA/Ps. This report adds to national research on rural workforce development, highlighting the role of academic-community partnerships in expanding rural residency training outside of traditional funding models.

Higher Rates Of Emergency Surgery, Serious Complications, And Readmissions In Primary Care Shortage Areas, 2015-19.

Primary care physicians are often the first to screen and identify patients with access-sensitive surgical conditions that should be treated electively. These conditions require surgery that is preferably planned (elective), but, when access is limited, treatment may be delayed and worsening symptoms lead to emergency surgery (for example, colectomy for cancer, abdominal aortic aneurysm repair, and incisional hernia repair). We evaluated the rates of elective versus emergency surgery for patients with three access-sensitive surgical conditions living in primary care Health Professional Shortage Areas during 2015-19. Medicare beneficiaries in more severe primary care shortage areas had higher rates of emergency surgery compared with rates in the least severe shortage areas (37.8percent versus 29.9percent). They were also more likely to have serious complications (14.9percent versus 11.7percent) and readmissions (15.7percent versus 13.5percent). When we accounted for areas with a shortage of surgeons, the findings were similar. Taken together, these findings suggest that residents of areas with greater primary care workforce shortages may also face challenges in accessing elective surgical care. As policy makers consider investing in Health Professional Shortage Areas, our findings underscore the importance of primary care access to a broader range of services.

Acute Care Use Among Patients With Multiple Chronic Conditions Receiving Care From Nurse Practitioner Practices in Health Professional Shortage Areas.

Patients with multiple chronic conditions often have many care plans, polypharmacy, and unrelieved symptoms that contribute to high emergency department and hospital use. High-quality primary care delivered in practices that employ nurse practitioners can help prevent the need for such acute care services. However, such practices located in primary care health professional shortage areas face challenges caring for these patients because of higher workloads and fewer resources. We examined differences in hospitalization and emergency department use among patients with multiple chronic conditions who receive care from practices that employ nurse practitioners in health professional shortage areas compared to practices that employ nurse practitioners in non-health professional shortage areas. We performed an analysis of Medicare claims, merged with Health Resources and Services Administration data on health professional shortage area status in five states. Our sample included 394,424 community-dwelling Medicare beneficiaries aged ≥65 years, with at least two of 15 common chronic conditions who received care in 779 practices that employ nurse practitioners. We used logistic regression to assess the relationship between health professional shortage area status and emergency department visits or hospitalizations. We found a higher likelihood of emergency department visits among patients in health professional shortage areas compared to those in non-health professional shortage areas and no difference in the likelihood of hospitalization. Emergency department use differences exist among older adults with multiple chronic conditions receiving care in practices that employ nurse practitioners in health professional shortage areas, compared to those in non-health professional shortage areas. To address this disparity, the health professional shortage area program should invest in recruiting and retaining nurse practitioners to health professional shortage areas to ease workforce shortages.

Do Primary Care Health Professional Shortage Area Physician Bonus Payments Improve Access to Care or Utilization of Services for Medicare Beneficiaries: Empirical Evidence from Established Providers Subject to HPSA Designations

Do Primary Care Health Professional Shortage Area Physician Bonus Payments Improve Access to Care or Utilization of Services for Medicare Beneficiaries: Empirical Evidence from Established Providers Subject to HPSA Designations

We Need You Here! Predictors of Job Placement and Practice among New Mexico Family Medicine Residents.

Primary health care (PHC) is essential for a well-functioning health system. Although PHC has been shown to have adverse effects on health outcomes, many barriers prevent adequate access, including a shortage of primary care physicians. In New Mexico, 32 of 33 counties are designed as primary care health professional shortage areas, and the state has a lower-than-average primary care provider density compared with other states. This study explored the predictors of job placement among New Mexican Family Medicine residents. A retrospective cohort study design was used, which included a subset of data from The University of New Mexico (UNM) Family Medicine Residency Alumni Database and hard copy personnel files. The study's population consisted of the 260 graduates from the UNM Family Medicine Residency Program between 1998 and 2019. Analysis included simple and multiple logistic regression. Results indicated that, consistently, approximately two-thirds of first practices are in New Mexico, whereas the percentage with a current practice in New Mexico decreases over time. Those born in New Mexico or who attended the UNM School of Medicine were more likely to have their first and current practice in New Mexico. The results of this study provide further evidence that the relationship between place of birth and place of medical training are determining factors for both place of first and current practice. These results can inform practice, policy, and future research to address the pressing need for PHC in underserved and rural communities.

1340P Trends in access to early phase clinical trials in underserved populations during the COVID-19 pandemic

As the only NCI designated cancer center in the region, it is the mission of University of Kansas Cancer Center (KUCC) to lead efforts to reduce the cancer burden affecting our catchment area. KUCC serves a total population of 4.5 million; 96 counties (78%) and 25% of the population are rural based upon Rural-Urban Continuum Codes (RUCC). Notably, Kansas is a non-Medicaid expansion state and many rural individuals live at or below the poverty level. All but 12 of the 123 counties in KUCC catchment area are primary care Health Professional Shortage Areas by geographic and/or population standards.

“How do we get to them?” Insights on Preconception and Interconception Health for Women in Rural Northwest Ohio

Background: Rural women in the United States are at increased risk for poor preconception and interconception health. In a previous study, women living in Hardin County, a Primary Care Health Professional Shortage Area and maternity care desert in rural northwest Ohio expressed their concerns and their need for more resources to improve their health. As a follow-up study, key informants of Hardin County were interviewed to provide further insight on current resources for preconception and women’s health available to community members, barriers and challenges community members face, and interventions could be implemented in the county to improve health and pregnancy outcomes. Methods: A purposive sample of 14 key informants from community assets in Hardin County were recruited and individually interviewed with semistructured questions from 2 domains: perceived needs and barriers to care. Interview recordings were transcribed, precoded, and thematically analyzed. Participants received a $20 gift card as a token of appreciation. Results: Three themes were characterized from the data: current resources available, community observations, and suggested intervention strategies. Key informants identified the federally-qualified health center and YMCA, among others, as potentially underutilized resources for reproductive-age women. The small-town culture was described as both an advantage and disadvantage when trying to raise awareness about preconception/interconception health. Interventions built on partnerships and utilizing various outlets were suggested. Childcare, intergenerational knowledge transfer, and trust were issues crossing multiple themes. Conclusion: Key informants gave direction on available resources for reproductive-age women and potential approaches to provide education and outreach regarding preconception/interconception health and care.

COVID-19 Vaccination: Concerning Trends in Primary Care Health Professional Shortage Areas

Widespread vaccination is the most promising way to control the coronavirus disease 2019 (COVID-19) pandemic. Unfortunately, U.S. vaccination rates have stagnated. The rates are particularly low among racial/ethnic minority groups1 and rural residents.2 Although much of the discussion about low vaccination centers on person-level factors, the role of healthcare system factors is not well understood. An important system factor is the availability of primary care physicians, who play an integral role in counseling patients regarding the risks and benefits of vaccination.

The effects of physician retirement on patient outcomes: Anticipation and disruption

The physician retirement rate in the United States is increasing as the population ages. I use an event study model allowing for anticipation to evaluate the effects of primary care physician (PCP) retirement on elderly adults’ health care utilization and quality of care. I find that, despite moderate anticipatory effects, PCP retirement results in an approximately $572 increase in total Medicare costs per beneficiary in the first 1.5 years post-retirement and an over 10% increase in detection of new chronic conditions. Heterogeneity analyses show that the increase in costs is disproportionately driven by the retirement of solo practitioners; Medicare beneficiaries with a retired PCP practicing in states with mandatory physician departure notice experience less disruption in care; and beneficiaries living in primary care health professional shortage areas experience greater disruption in care.

Recruitment for Remote Decentralized Studies in Parkinson's Disease.

Background:Traditional in-person Parkinson’s disease (PD) research studies are often slow to recruit and place unnecessary burden on participants. The ongoing COVID-19 pandemic has added new impetus to the development of new research models.Objective:To compare recruitment processes and outcomes of three remote decentralized observational PD studies with video visits.Methods:We examined the number of participants recruited, speed of recruitment, geographic distribution of participants, and strategies used to enhance recruitment in FIVE, a cross-sectional study of Fox Insight participants with and without PD (n = 203); VALOR-PD, a longitudinal study of 23andMe, Inc. research participants carrying the LRRK2 G2019S variant with and without PD (n = 277); and AT-HOME PD, a longitudinal study of former phase III clinical trial participants with PD (n = 226).Results:Across the three studies, 706 participants from 45 U.S. states and Canada enrolled at a mean per study rate of 4.9 participants per week over an average of 51 weeks. The cohorts were demographically homogenous with regard to race (over 95%white) and level of education (over 90%with more than a high school education). The number of participants living in primary care Health Professional Shortage Areas in each study ranged from 30.3–42.9%. Participants reported interest in future observational (98.5–99.6%) and interventional (76.1–87.6%) research studies with remote video visits.Conclusion:Recruitment of large, geographically dispersed remote cohorts from a single location is feasible. Interest in participation in future remote decentralized PD studies is high. More work is needed to identify best practices for recruitment, particularly of diverse participants.

Values that influence employment acceptance among physical therapists practicing in primary care shortage and non-urban designation areas.

Physical therapists (PTs) in all United States, DC, and the US Virgin Islands have first-contact direct access privileges to examine and treat patients. Evidence supports the value of PT services in reducing annual healthcare costs, decreasing the need for prescription pain medication, and decreasing the need for outpatient physician care. PTs can play an essential role in managing patient health needs in primary care health professional shortage areas (pcHPSAs), especially in rural areas, which are disproportionately affected by shortage-related health disparities. The current study examined values that differentiated PTs who accept and maintain employment in pcHPSAs and non-urban areas, as a means of advising health agencies within these designation areas. A survey invitation was emailed to PTs in six states. The Determinants of Employment Acceptance Survey was used to survey the importance of six factors (attachment to place, community assets, practice environment, professional advancement, relationships, and remuneration) when considering employment. Respondents included 373 PTs (36% pcHPSA; 33% non-urban). Professional advancement was significantly more important to PTs intending to continue their employment in a pcHPSA. Community assets were more important to PTs in non-urban areas who planned to leave their employment within 5 years. The most valued factors for PTs, regardless of practice location, were practice environment and attachment to place. Employers in rural areas or pcHPSAs who are interested in recruiting and retaining PTs should consider the importance of professional advancement, practice environment, and workplace relationships, and should use strategic measures to fortify these assets within the workplace.

Pharmacist provider status: Geoprocessing analysis of pharmacy locations, medically underserved areas, populations, and health professional shortage areas

BackgroundPayment reform for pharmacists is both an important and urgent issue that needs to be addressed. Objective(s)The purpose of this paper is to assess the use of medically underserved areas, medically underserved populations, and primary care health professional shortage areas in The Pharmacy and Medically Underserved Areas Enhancement Act; and provide policy recommendations for national pharmacy associations to achieve provider status. MethodsPharmacy location addresses were determined using public domain data from the National Plan & Provider Enumeration System (NPPES) National Provider Identifier (NPI) Registry. Medically Underserved Areas/Populations (MUAs/MUPs) and Health Professional Shortage Areas (HPSAs) were gathered through public data provided by the Health Resources and Services Administration as Keyhole Markup Language (KML) files. Addresses and KML files were analyzed and mapped using the geographic information software, QGIS. A series of maps depicting the location of all MUAs/MUPs, HPSAs, HPSA facility locations, and community pharmacy locations in the U.S. were then created. These maps were overlayed, and geoprocessing tools were used to create the analysis. ResultsAfter analyzing all community pharmacy locations in the United States, we found that only 56% are located within a current MUA/MUP or HPSA. The percentage of pharmacies in healthcare underserved areas differs widely between states from the lowest in New Jersey of 18.26% of pharmacies to the highest of Guam, the Northern Mariana Islands and the Virgin Islands with 100% of pharmacies. ConclusionsAligning the pharmacist business model to be comparable to other health care professionals will ensure patients receive access to pharmacist-provided cognitive patient care services, which have higher value than product-centered services. Future attempts to recognize pharmacists as providers and allow for their reimbursement under Medicare Part B should consider strategies to increase the number of pharmacists that are eligible to participate in order to exemplify value to the public and elected leaders.

Primary Care Health Professional Shortage Area Designations Before and After the Affordable Care Act’s Shortage Designation Modernization Project

This cross-sectional study evaluates whether the Patient Protection and Affordable Care Act (ACA) Shortage Designation Modernization Project is associated with changes in primary care health professional shortage area (PC-HPSA) designations.

Individual and Community Factors Associated with Naloxone Co-prescribing Among Long-term Opioid Patients: a Retrospective Analysis.

Naloxone co-prescribing to individuals at increased opioid overdose risk is a key component of opioid overdose prevention efforts. Examine naloxone co-prescribing in the general population and assess how co-prescribing varies by individual and community characteristics. Retrospective cross-sectional study. We conducted a multivariable logistic regression of 2017-2018 de-identified pharmacy claims representing 90% of all prescriptions filled at retail pharmacies in 50 states and the District of Columbia. Individuals with opioid analgesic treatment episodes > 90 days MAIN MEASURES: Outcome was co-prescribed naloxone. Predictor variables included insurance type, primary prescriber specialty, receipt of concomitant benzodiazepines, high-dose opioid episode, county urbanicity, fatal overdose rates, poverty rates, and primary care health professional shortage areas. Naloxone co-prescribing occurred in 2.3% of long-term opioid therapy episodes. Medicaid (aOR 1.87, 95%CI 1.84 to 1.90) and Medicare (aOR 1.48, 95%CI 1.46 to 1.51) episodes had higher odds of naloxone co-prescribing than commercial insurance episodes, while cash pay (aOR 0.77, 95%CI 0.74 to 0.80) and other insurance episodes (aOR 0.81, 95%CI 0.79 to 0.83) had lower odds. Odds of naloxone co-prescribing were higher among high-dose opioid episodes (aOR 3.19, 95%CI 3.15 to 3.23), when concomitant benzodiazepines were prescribed (aOR 1.12, 95%CI 1.10 to 1.14), and in counties with higher fatal overdose rates. Co-prescription of naloxone represents a tangible clinical action that can be taken to help prevent opioid overdose deaths. However, despite recommendations to co-prescribe naloxone to patients at increased risk for opioid overdose, we found that co-prescribing rates remain low overall. States, insurers, and health systems should consider implementing strategies to facilitate increased co-prescribing of naloxone to at-risk individuals.

Illustrating access to community pharmacies in Wisconsin

ObjectivesCommunity pharmacists also play a vital public health role in increasing access to health care services and information during times of public health crisis. To examine access to community pharmacies in Wisconsin and the relationship between pharmacy locations and primary care health professional shortage areas (HPSAs). MethodsA list of licensed pharmacies in Wisconsin was screened to identify community pharmacies. Rural-urban commuting area codes were used to classify the rurality of pharmacy locations. Descriptive measures and pharmacy location maps were used to assess access to community pharmacies in the state as well as the relationship between pharmacy locations and primary care HPSAs. Spatial analysis was conducted to estimate the percentage of the population that lives within 10-, 20-, and 30-minute drive times of each community pharmacy. ResultsOf the 837 community pharmacies in Wisconsin, 73 (68.5%) were located in metropolitan areas, 95 (11.4%) in micropolitan areas, 112 (13.4%) in small towns, and 57 (6.8%) in rural areas. A total of 265 (31.7%) community pharmacies were located in a primary care HPSA. The drive-time analysis found that 99.7% of the population lives within 30 minutes of a pharmacy, 98.7% within 20 minutes of a pharmacy, and 89.3% within 10 minutes of a pharmacy. ConclusionsNearly the entire Wisconsin population has convenient access to community pharmacies. Community pharmacies are ideally located in underserved areas with shortages of other health professionals, which may provide an opportunity for pharmacists to take on additional clinical roles to support health care providers and facilities in these areas.

Percentage of Black Population and Primary Care Shortage Areas Associated with Higher COVID-19 Case and Death Rates in Georgia Counties.

We hypothesized that the proportion of Black individuals in a county would be associated with higher rates of coronavirus disease 2019 (COVID-19) cases and deaths, even after accounting for other high-risk socioecologic factors such as poverty, population density, and household crowding, and uninsured rates. We also expected that counties designated as primary care health professional shortage areas (PCHPSAs) would be associated with higher COVID-19 death rates, and the lack of primary care access would exacerbate racial disparities in death rates. We undertook this study to test these hypotheses and discern the independent effects of racial composition, socioecologic characteristics, and healthcare system factors on COVID-19 cases and deaths in Georgia counties. We used county-level COVID-19 cases and deaths on April 23, 2020 from the Johns Hopkins Coronavirus Resource Center and estimates of 2019 county-level populations from the US Census Bureau to calculate the cumulative event rates for the state of Georgia. We used multiple regression models to examine crude and adjusted associations of socioecologic and health system variables with county-level COVID-19 case and mortality rates. After adjustment, a 1% increase in the proportion of Black people in the county resulted in a 2.3% increase in the county COVID-19 confirmed case rate and a 3.0% increase in the death rate (relative risk 1.03, 95% confidence interval 1.01-1.05, P < 0.001). Primary care shortage areas had a 74% higher death rate (relative risk 1.74, 95% confidence interval 1.00-3.00, P = 0.049). These results highlight the impact of racial disparities on the spatial patterns of COVID-19 disease burden in Georgia, which can guide interventions to mitigate racial disparities. The results also support the need for robust primary care infrastructure throughout the state.

Nurse practitioners’ workforce outcomes under implementation of full practice authority

BackgroundFull practice authority laws that permit nurse practitioners (NPs) to practice independently and prescribe medications may influence NPs’ workforce outcomes. PurposeTo examine whether implementation of full practice authority laws affect NP self-employment, average earnings, and likelihood of residing in a primary care health professional shortage area (HPSA). MethodsA nationally representative U.S. sample of 9,782 NPs employed in health care during 2010 to 2018 was drawn from the American Community Survey. Difference-in-differences regression was used to estimate covariate-adjusted mean differences in NPs’ workforce outcomes after full practice authority implementation. FindingsAmong full-time employed NPs, full practice authority was associated with an increased probability of residing in a HPSA (adjusted odds ratio [aOR]:2.34, 95%CI 1.14, 4.83) and with a higher mean probability of self-employment (aOR:4.97, 95%CI 1.00, 24.86). DiscussionFull practice authority implementation improves access to primary care providers in health professional shortage areas and may increase practice ownership among NPs.

The geographic alignment of primary care Health Professional Shortage Areas with markers for social determinants of health.

BackgroundThe Health Resources and Services Administration (HRSA), an agency within the U.S. Department of Health and Human Services (HHS), works to ensure accessible, quality, health care for the nation’s underserved populations, especially those who are medically, economically, or geographically vulnerable. HRSA-designated primary care Health Professional Shortage Areas (pcHPSAs) provide a vital measure by which to identify underserved populations and prioritize locations and populations lacking access to adequate primary and preventive health care–the foundation for advancing health equity and maintaining health and wellness for individuals and populations. However, access to care is a complex, multifactorial issue that involves more than just the number of health care providers available, and pcHPSAs alone cannot fully characterize the distribution of medically, economically, and geographically vulnerable populations.Methods and findingsIn this county-level analysis, we used descriptive statistics and multiple correspondence analysis to assess how HRSA’s pcHPSA designations align geographically with other established markers of medical, economic, and geographic vulnerability. Reflecting recognized social determinants of health (SDOH), markers included demographic characteristics, race and ethnicity, rates of low birth weight births, median household income, poverty, educational attainment, and rurality. Nationally, 96 percent of U.S. counties were either classified as whole county or partial county pcHPSAs or had one or more established markers of medical, economic, or geographic vulnerability in 2017, suggesting that at-risk populations were nearly ubiquitous throughout the nation. Primary care HPSA counties in HHS Regions 4 and 6 (largely lying within the southeastern and south central United States) had the most pervasive and complex patterns in population risk.ConclusionHHS Regions displayed unique signatures with respect to SDOH markers. Descriptive and analytic findings from our work may help inform health workforce and health care planning at all levels, and, by illustrating both the complexity of and differences in county-level population characteristics in pcHPSA counties, our findings may have relevance for strengthening the delivery of primary care and addressing social determinants of health in areas beset by provider shortages.