The National Health Service Corps (NHSC) is a clinician recruitment and retention program that aims to reduce health workforce shortages in underserved areas. The NHSC has three components: (1) a federal scholarships program, (2) a federal loan repayment program, and (3) a state-operated loan repayment program. Under each of these programs, health providers receive either scholarships or loan repayments in exchange for a service commitment at an NHSC-approved facility located in a federally designated health professional shortage area (HPSA, see text box). Participants in the state loan repayment programs may also serve in state-designated shortage areas; federal program participants may not. NHSC-approved facilities are generally nonprofit or government-operated (federal, state, local, and tribal) organizations that provide care to patients without regard for the patient's ability to pay. The three NHSC programs are managed by the Bureau of Health Workforce (BHW) in the Health Resources and Service Administration (HRSA), an agency in the Department of Health and Human Services (HHS). The NHSC was created by the Emergency Health Personnel Act of 1970 to provide an adequate supply of trained health providers in federally designated HPSAs. Since the program's inception, Congress has reauthorized and revised the program several times, with the most recent reauthorization included in the Patient Protection and Affordable Care Act ( P.L. 111-148 , ACA). The ACA permanently reauthorized the NHSC, creating, among other things, a mandatory funding stream for the program and implementing a part-time option, which allows part-time service in exchange for an extended service commitment. This report provides an overview of the NHSC, including the program's funding, the number and types of providers the program supports, and the locations where they serve. The NHSC consists of three programs: (1) a federal scholarships program, (2) a federal loan repayment program, and (3) a state-operated loan repayment program. The federal scholarship program provides scholarships in exchange for a service commitment at the end of a recipient's education, including any training required before licensure. The two loan repayment programs provide clinicians with loan repayment in exchange for an immediate service commitment. HRSA administers the federal scholarship and loan repayment programs and provides funds to states. States match these funds to operate state loan repayment programs. The largest program is the federal loan repayment program, followed by the state loan repayment program, and then the scholarship program. The section below describes these three programs. The discussion focuses on program differences; however, the programs share a number of common elements. Specifically, all three programs require a minimum service commitment of two years in a HPSA. All are restricted to U.S. citizens or U.S. nationals, and all provide awards that are exempt from federal income and employment taxes. In addition, all three programs allow physicians, dentists, physician assistants, nurse midwives, and nurse practitioners to participate, but the loan repayment programs also permit additional provider types to participate. The three program types are described below; Table 2 presents data on the number of awards made under each of these programs. The NHSC Scholarship Program is established in Section 338A of the Public Health Service Act (PHSA). It provides scholarships--including tuition, reasonable education expenses, and a monthly living stipend--to individuals enrolled full-time in specified education programs at a fully accredited U.S. school. Eligible schools/programs include medical schools (allopathic and osteopathic), physician assistant programs, dental schools, and advance practice nursing schools. Individuals must agree to complete their training (including residency training or required clinical hours, where applicable) in primary care . For each year of scholarship support received (or partial year after the first year), students must agree to provide an additional year of service in a HPSA. For example, if a full-time service scholar receives three years of scholarship support the scholar would owe three years of full-time service at an approved facility. The number of school years of NHSC scholarship support received by the scholar may not exceed four school years. As such, through the scholarship program, the maximum required years of full-time service at an approved facility is four years. NHSC scholars begin their service commitment upon the completion of training, including any advance clinical training needed for licensure (e.g., primary care residency for physicians). Participants must also have obtained a professional license, certificate, or registration before beginning their service commitment. NHSC scholars must fulfill their service commitment on a full-time basis and are required to fulfill their service commitment in a HPSA of "greatest need." Each year HRSA determines the HPSA score indicative of "greatest need." For example, from October 1, 2016, through September 30, 2017, NHSC scholars must work at NHSC-approved service sites with a HPSA score of 17 or above for their discipline (e.g., a dental scholar is required to serve in an area with a dental HPSA score above 17). Individuals participating in the federal loan repayment program may serve part-time and may serve in areas with lower HPSA scores, but scholars may not. At the end of their service commitment, scholars may apply for continuation awards through the loan repayment program if they still have educational debt remaining and are willing to continue service at an NHSC-approved facility. The NHSC Federal Loan Repayment Program is authorized in PHSA Sections 331(i) and 338B. In addition to the list of providers who may participate in the scholarship program, dental hygienists and behavioral/mental health providers may also receive loan repayment. Loan repayment recipients must have a license or certificate needed to practice and must be employed or have accepted an offer to be employed at an NHSC-approved work site. Loan repayment is available only for "qualifying educational debt," which means principal, interest, and related expenses of outstanding government and private student loans obtained for undergraduate or graduate education for tuition, along with reasonable educational and living expenses. Federal loan repayors have a two-year service commitment, which they may fulfill full-time for two years or part-time for four. The amount of loan repayment received varies based on the HPSA score of the site where the loan repayor is employed. For full-time service at an approved site with a HPSA score of 14 or above, a loan repayor may receive amounts up to $50,000 for an initial two-year obligation. Individuals serving at a site with a HPSA score of 13 or lower may receive up to $30,000 for an initial two years of service. Loan repayment recipients may apply for continuation awards if they have educational debt at the end of their two-year loan repayment commitment. Continuation awards are awarded in one-year intervals, and individuals may apply for and receive continuation awards as long as they have qualifying educational debt and remain employed at an NHSC-approved site. In 2012, HRSA used the authority in PHSA Section 338B to establish a new program within the federal loan repayment program called the Students to Service (S2S) Loan Repayment Program. The S2S program provides assistance of up to $120,000 to medical students (allopathic and osteopathic) in their final year of medical school. In return, S2S program recipients must complete an approved primary care residency and undertake their required NHSC service in a HPSA of the greatest need for at least three years (full-time) or six years (half-time). S2S repayors may also complete a one-year fellowship in geriatrics after their primary care residency and before beginning their service commitment. In 2016, HRSA made loan repayment awards through a new program funded by the Zika Response and Preparedness Appropriations Act ( P.L. 114-223 ). This program provides up to $70,000 in loan repayment in exchange for a three-year service commitment at NHSC approved sites in Puerto Rico or other U.S. territories affected by Zika. Health professionals eligible for the federal loan repayment program are also eligible for this program. Licensed professionals in medical specialties and allied health fields who may be able to provide Zika-related care (e.g., physical therapy and certain medical specialties) are also eligible. The state loan repayment program is authorized in PHSA Section 338I. The program is similar to the Federal Loan Repayment Program, except that (1) it is a matching grant between the state and the NHSC, (2) states may choose to expand or contract the types of clinicians who are eligible to participate in their program, and (3) states may require more than two years of service in exchange for loan repayment. For example, states have the option of addressing their unique workforce needs by making additional types of professionals eligible, such as registered nurses and pharmacists, although neither of these provider types are eligible to participate in the federal loan repayment program. State loan repayors must provide care in a HPSA in exchange for their award, but states determine the approved service sites for their programs. State loan repayment participants must also serve two years as an initial commitment, but states may require longer minimum service commitments or may vary the service commitment length by provider type. State loan repayment recipients may fulfill their service commitments on a full- or part-time basis. The amount of total funds that the NHSC receives determines the number of awards that the program can make. Historically, the NHSC had been exclusively funded as part of HRSA's discretionary appropriation. However, that is no longer the case, as the program is now funded by the mandatory Community Health Center Fund (CHCF). The ACA created the CHCF and provided mandatory funding for it over a five-year period (FY2011-FY2015). The fund was intended to supplement the NHSC budget; however, from FY2012 to FY2017, it made up the entirety of the program's funding. The CHCF was initially set to expire at the end of FY2015; however, it was extended for two years (FY2016 and FY2017) as part of the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA, P.L. 114-10 , CHIP is the State Children's Health Insurance Program). At the start of FY2018, no mandatory funds had been appropriated for the NHSC; however, a temporary extension ( P.L. 115-96 ) ultimately provided mandatory funding for the first two quarters of FY2018, and the Bipartisan Budget Act of 2018 (BBA 2018, P.L. 115-123 ) later provided full-year funding for FY2018 and FY2019. Amounts provided by the CHCF have also been reduced in some years as part of the mandatory spending sequester (pursuant to the Balanced Budget and Emergency Deficit Control Act of 1985, as amended). Although the program had not received discretionary appropriations from FY2012 through FY2017, it received $105 million in FY2018 in P.L. 115-141 , with funds directed toward supporting health care providers who provide opioid and other substance use disorder treatment in HPSAs. Table 1 presents funding provided for the program between FY2011 and FY2019--though amounts for FY2019 are subject to change. The table also shows the percentage of funding that comes from discretionary and mandatory sources. For FY2019, the table shows mandatory amounts already appropriated for the program, but readers should note that the FY2019 President's budget requested providing discretionary, rather than mandatory, funding for the program in that year. NHSC program size is measured in three ways: (1) funding, discussed above; (2) recruitment , which is the number of awards in different categories; and (3) field strength, which is the number of NHSC clinicians currently fulfilling their service commitments. Recruitment in a given year is generally smaller than the program's field strength because the latter includes loan repayors who are currently fulfilling their service commitments, including those who are fulfilling a second year of their service commitment, and individuals who received scholarships or S2S agreements in earlier years who have completed their required training and are currently fulfilling their service commitments. The section below discusses recruitment and field strength. From FY2011 through FY2017, the most recent year of final data available, the NHSC offered more than 39,000 loan repayment agreements and scholarship awards to individuals who have agreed to serve for a minimum of two years in a HPSA. In FY2011, the beginning of the ACA's CHCF, the NHSC received its largest appropriation to date, which increased the number of awards that the NHSC was able to make. The number of awards made has varied since FY2011, with an increase in FY2016, while the number of awards made in FY2017 was more similar to the number awarded in FY2015. Table 2 shows NHSC clinician recruitment activity for the NHSC's active programs, by type of award, from FY2011 through FY2017. The number of awards the NHSC makes at any point in time is only one component of program size, as not all awardees are currently serving as NHSC providers. Specifically, NHSC scholars and S2S program participants are still completing their training. As such, the NHSC also measures its field strength, which is the number of NHSC providers who are fulfilling a service obligation in a HPSA in a given year. In FY2017, the most recent year in which data are available, total NHSC field strength was 10,179. Field strength is a measure of both the NHSC appropriation, which affects the number of awards that can be made, and the relative balance between scholarships and loan repayment, both in the current fiscal year and in the past. The NHSC field strength has increased in recent years as the number of awards made has increased (see Figure 1 ). As of April 2018, HRSA data indicate that there were 8,256 total providers. The majority of these individuals (7,620) were loan repayors, which reflects the NHSC's prioritization of clinicians who will undertake their service commitment immediately in HPSAs. In contrast, HRSA makes scholarship awards in an earlier year, so the funding investment is not realized for several years, as the scholar completes his or her schooling and required training. Despite increased field strength, more sites are eligible to receive an NHSC provider than there are NHSC providers. Specifically, in April 2018, there were 4,605 open NHSC positions that could not be filled because the NHSC field strength was not sufficient to meet the needs of every NHSC site. The NHSC is made up of an increasingly diverse set of health professionals. The composition of the NHSC has changed over time. In FY2009, physicians accounted for nearly 35% of providers and were the largest group of providers in the NHSC. In contrast, in FY2016, they made up 21%, and behavioral/mental health providers are now largest provider types. Physicians and nurse practitioners are the next largest groups of providers. In FY2017, the most recent year for which complete data are available, the following three professional groups made up 73% of the NHSC: mental and behavioral health providers (30%), nurse practitioners, including nurse midwives (23%), and allopathic and osteopathic physicians (20%). Figure 2 shows the NHSC's workforce by provider type in FY2017, the most recent year for which complete data are available. Some individuals and professional groups have advocated for making additional provider types eligible for the NHSC. For example, legislation in the 115 th Congress ( H.R. 1378 ) would make chiropractors eligible to participate in the federal scholarship and loan repayment programs, and H.R. 1639 and S. 619 would make physical therapists eligible for the federal loan repayment program. The Consolidated Appropriations Act, 2018 ( P.L. 115-141 ), expanded eligibility for the NHSC loan repayment program to substance use disorder counselors; the law also increased NHSC funding and specified that this funding be used to support substance use disorder providers. These specifications in the law may avert a number of the potential concerns that exist with other efforts to expand NHSC eligible provider types or sites. Specifically, because the number of applicants applying for awards exceeds the funding available, past efforts to expand provider eligibility have been met with concerns that it would increase competition for the program unless there was an increase in appropriations. Moreover, adding new provider types or site type does not guarantee that newly eligible clinicians or sites would receive awards, because there are no quotas for specific numbers of providers by discipline; however, the changes in the Consolidated Appropriations Act, 2018 ( P.L. 115-141 ), specify that funds be used to support the newly added providers. Generally, NHSC awards are made competitively, with scholarships generally awarded based on participant characteristics (e.g., the participant's commitment to primary care practice and the likelihood of remaining in a shortage area after the NHSC service commitment has ended). Loan repayment awards are made based on the HPSA score of the site and on the loan repayment program participant's characteristics. Although legislation has been used to modify eligible disciplines, the HHS Secretary has some authority to add disciplines without new laws being enacted. For example, exchanges among the Secretary of HHS and the House and Senate Appropriations Committees seem to suggest that Congress recognizes the Secretary's authority to include additional disciplines in the NHSC without congressional action. For example, in 2012, the Senate Appropriations Committee urged the Secretary to offer loan repayments to pharmacists and chiropractors through the NHSC. Despite what appeared at that time to be congressional support for administrative action, in 2013, the Secretary declined to include pharmacists on the list of eligible NHSC providers. The Secretary's response to this request from the Senate Appropriations Committee was based on an interpretation that pharmacy and chiropractor services would be outside of the core intent of the NHSC to provide "primary health services." In 2015, the Senate Appropriations Committee again raised the issue of the Secretary's authority to add pharmacists, which are sometimes part of primary care teams; however, these providers remain ineligible for loan repayment. Similar conversations have occurred between HHS and the House Appropriations Committee regarding optometry. In each of these instances, HHS has not agreed to expand the program's eligibility out of concern that doing so would shift the program away from its traditional focus of providing primary care to underserved populations. HHS also emphasized that the program is currently competitive and that adding new disciplines as eligible could redirect NHSC funds away from already identified clinical shortage areas and add new ones. Another concern is that adding new providers may limit the total number of individuals served by the NHSC because the new provider types (e.g., optometrists and chiropractors) serve a narrower subset of the population than do primary care providers. Despite debates on expanding the clinicians eligible for the NHSC, Congress has, at times, clarified the range of eligible providers. For example, the 21 st Century Cures Act, enacted in 2016, clarified that adolescent and child psychiatrists are eligible to participate in the federal loan repayment program. This law, however, did not expand the list of NHSC providers. Instead, it sought to clarify that, within the existing group of NHSC-eligible psychiatrists, those who specialize in child and adolescent psychiatry are eligible to participate in the NHSC. NHSC providers may serve at a number of facility types that generally focus on providing outpatient primary care to patients regardless of their ability to pay. In addition, some NHSC provider sites generally focus on primary care, such as community mental health centers, which are more targeted to behavioral health care. As mentioned, these facilities must be located in HPSAs. NHSC eligible sites include community mental health centers, correctional facilities, critical access hospitals, facilities funded by the Indian Health Service (including those operated by Indian Tribes, Tribal Organizations, and Urban Indian Organizations), federal health centers (i.e., Federally Qualified Health Centers [FQHCs]), FQHC look-alikes, free clinics, rural health clinics, and school-based health centers. NHSC providers can be placed at facilities operated by not-for-profit organizations and by government entities (including state, local, tribal, and federally operated facilities). In addition, HRSA requires that NHSC sites are part of a system of care (e.g., have after-hours arrangements for patient care); have a documented record of sound fiscal management; have a history of using NHSC providers appropriately and efficiently; accept beneficiaries from Medicare, Medicaid, and CHIP; have a sliding scale discount schedule; and have general community support for assigning NHSC providers to the facility. More than half of all NHSC providers serve at federally qualified health centers (FQHCs), which provide outpatient--generally primary and behavioral--health care to disadvantaged populations regardless of their ability to pay (see Figure 3 ). NHSC providers also increasingly provide care at facilities funded by the Indian Health Service, including federal, tribal, and urban Indian health facilities. As of August 2017, 492 (5.4%) providers were fulfilling their service commitment at IHS-funded facilities, an increase from the 421 providers who were placed at IHS facilities as of December 2015. As mentioned, NHSC providers generally fulfill their service commitment in outpatient settings. However, some may serve at IHS-funded hospitals, and in recent years, some have fulfilled part of their service commitment (up to 24 hours per week) at critical access hospitals (CAHs), which are small hospitals located in rural areas. As of August 2017, 45 NHSC providers were serving at CAHs. HRSA requires that these providers split their time between inpatient services at the CAH (up to 24 hours per week) and outpatient services at CAH affiliated-outpatient clinics (not less than 16 hours per week). NHSC providers are located at HPSAs throughout the United States and its territories (see Figure 4 ). According to 2016 data, 23% of all NHSC providers served in rural areas. Legislative efforts have also been undertaken to expand the types of sites eligible for NHSC providers, specifically targeting facilities that could provide treatment for individuals with opioid addiction. For example, in the 115 th Congress, S. 1453 would make substance use disorder treatment facilities eligible provider sites. These facilities provide both outpatient and inpatient services, including medication-assisted treatment. Proposals to expand eligible sites may face similar challenges to proposals to expand provider types--namely that the number of sites eligible for NHSC providers exceeds the program's field strength, so adding new site types may increase the number of sites and positions that seek NHSC providers but are unable to obtain one. The NHSC collects limited data on whether NHSC providers remain in HPSAs after fulfilling their service commitments. Available data indicate that less than half (43%) remain at their service site, and nearly 80% practice in a HPSA one year after their service commitment has ended. An FY2012 study found that more than half remain in a HPSA 10 years after completing their service. These data are similar to what HRSA found in an FY2000 evaluation of the program.

Summary:
The National Health Service Corps (NHSC) provides scholarships and loan repayments to health care providers in exchange for a period of service in a health professional shortage area (HPSA). The program places clinicians at facilities--generally not-for-profit or government-operated--that might otherwise have difficulties recruiting and retaining providers. The NHSC is administered by the Health Resources and Services Administration (HRSA), within the Department of Health and Human Services (HHS). Congress created the NHSC in the Emergency Health Personnel Act of 1970 (P.L. 91-623), and its programs have been reauthorized and amended several times since then. The Patient Protection and Affordable Care Act of 2010 (ACA; P.L. 111-148) permanently reauthorized the NHSC. Prior to the ACA, the NHSC had been funded with discretionary appropriations. The ACA created a new mandatory funding source for the NHSC--the Community Health Center Fund (CHCF), which was intended to supplement the program's annual appropriation. However, between FY2012 and FY2017, the CHCF entirely replaced the NHSC's discretionary appropriation. For FY2018, the NHSC received $105 million from discretionary appropriations in P.L. 115-141 to support awards to expand and improve access to opioid and other substance use disorder treatment providers. The law also reserves $30 million from the $105 million for the new Rural Communities Opioid Response initiative administered by the Federal Office of Rural Health Policy within HRSA. For FY2018, CHCF funding represents 75% of the program's appropriation. The CHCF is time-limited. Initially an appropriation from FY2011 through FY2015, the CHCF was subsequently extended in the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA, P.L. 114-10) through FY2017 and then extended for an additional two years (i.e., through FY2019) in the Bipartisan Budget Act of 2018 (BBA 2018, P.L. 115-123). From FY2011 through FY2017, the most recent year of final data available, the NHSC offered more than 39,000 loan repayment agreements and scholarship awards to individuals who have agreed to serve for a minimum of two years in a HPSA. In FY2017, the NHSC made 5,711 awards. The number of awards the NHSC makes is only one component of program size, because not all awardees are currently serving as NHSC providers; some are still completing their training (e.g., scholarship award recipients). As such, the NHSC also measures its field strength: the number of NHSC providers who are fulfilling a service obligation in a HPSA in a given year. In FY2017, total NHSC field strength was 10,179. NHSC providers are currently serving in a variety of settings throughout the entire United States and its territories. The majority of NHSC providers serve in outpatient settings, most commonly at federally qualified health centers.