Primary Health Care in Community Health Centers and Comparison with Office-Based Practice

We examine the roles of nurse practitioners (NPs), physician assistants (PAs), and nurse midwives (CNMs) in community health centers (CHCs). We also compare primary care physicians in CHCs with office-based physicians. Estimates are from the National Ambulatory Medical Care Survey, a nationally representative annual survey of nonfederal, office-based patient care physicians and their visits. Analysis of primary care delivery in CHCs and office-based practices are based on 1,434 providers and their visits (n = 32,300). During 2006–2007, on average, physicians comprised 70% of CHC clinicians, with NPs (20%), PAs (9%), and CNMs (1%) making up the remainder. PAs, NPs, and CNMs provided care in almost a third of CHC primary care visits; 87% of visits to these CHC providers were independent of physicians. Types of patients seen by clinicians suggest a division of labor in caring for CHC patients. NPs and PAs were more likely than physicians to report providing health education services. There were no other differences among services examined. Office-based physicians were less likely to work alongside PAs/NPs/CNMs than CHC physicians. CHC staffing is contingent on a variety of providers. CHC staffing patterns may serve as models of primary care staffing for office practices as demand for primary care services nationwide increases.     

Autonomous ambulatory care by nurse practitioners and physician assistants in office-based settings

Data from the 1997 National Ambulatory Medical Care Survey were used to examine the autonomous provision of ambulatory medical care by nurse practitioners (NPs) and physician assistants (PAs) in physician-managed office-based settings. An estimated 6.81 million office visits involved autonomous care by NPs and PAs, for an overall rate of 2.55 visits per 100 persons. The visit rates were greatest for patients over 64 years of age, females, blacks, and patients from the Northeast. The visits encompassed a broad range of acute and chronic problems, with a greater proportion of non-illness care visits when compared with visits to physicians. While NPs and PAs provided diagnostic services and pharmacotherapy, there was more emphasis on therapeutic or preventive services in their practices than among physicians' practices. Predisposing, enabling, and need factors were differentially associated with visits to NPs and PAs. Utilization of NPs and PAs as autonomous providers in office-based settings appears limited. Public policy and educational initiatives can focus on predisposing, enabling, and need factors to increase access to autonomous practice of NPs and PAs in ambulatory care.     

The contribution of nurse practitioners and physician assistants to generalist care in Washington State

OBJECTIVE: To quantify the total contribution to generalist care made by nurse practitioners (NPs) and physician assistants (PAs) in Washington State. DATA SOURCES: State professional licensure renewal survey data from 1998-1999. STUDY DESIGN: Cross-sectional. Data on medical specialty, place of practice, and outpatient visits performed were used to estimate productivity of generalist physicians, NPs, and PAs. Provider head counts were adjusted for missing specialty and productivity data and converted into family physician full-time equivalents (FTEs) to facilitate estimation of total contribution to generalist care made by each provider type. PRINCIPAL FINDINGS: Nurse practitioners and physician assistants make up 23.4 percent of the generalist provider population and provide 21.0 percent of the generalist outpatient visits in Washington State. The NP/PA contribution to generalist care is higher in rural areas (24.7 percent of total visits compared to 20.1 percent in urban areas). The PAs and NPs provide 50.3 percent of generalist visits provided by women in rural areas, 36.5 percent in urban areas. When productivity data were converted into family physician FTEs, the productivity adjustments were large. A total of 4,189 generalist physicians produced only 2,760 family physician FTEs (1 FTE = 105 outpatient visits per week). The NP and PA productivity adjustments were also quite large. CONCLUSIONS: Accurate estimates of available generalist care must take into account the contributions of NPs and PAs. Additionally, simple head counts of licensed providers are likely to result in substantial overestimates of available care. Actual productivity data or empirically derived adjustment factors must be used for accurate estimation of provider shortages.     

Satisfaction and well-being of primary care providers in managed care

We compared perceptions about the practice environment and the job satisfaction of physician assistants (PAs), nurse practitioners (NPs), and primary care physicians in a large group-model HMO. The data source was a self-administered mail survey (average response rate = 79%). PA/NPs and primary care physicians reported that professional autonomy was not a problem and were satisfied with most aspects of practice in this setting. Common areas of dissatisfaction included patient load and amount of time with patients. PA/NPs were more likely than the physicians to experience stress on a daily basis, however, and were less likely to report that they would choose the practice setting again. They also were significantly less satisfied than the physicians with their incomes and fringe benefits. Our findings suggest that more attention should be given to practice conditions and compensation of PAs and NPs in managed care.     

Use of midlevel practitioners to achieve labor cost savings in the primary care practice of an MCO

OBJECTIVE: To estimate the savings in labor costs per primary care visit that might be realized from increased use of physician assistants (PAs) and nurse practitioners (NPs) in the primary care practices of a managed care organization (MCO). STUDY SETTING/DATA SOURCES: Twenty-six capitated primary care practices of a group model MCO. Data on approximately two million visits provided by 206 practitioners were extracted from computerized visit records for 1997-2000. Computerized payroll ledgers were the source of annual labor costs per practice from 1997-2000. STUDY DESIGN: Likelihood of a visit attended by a PA/NP versus MD was modeled using logistic regression, with practice fixed effects, by department (adult medicine, pediatrics) and year. Parameter estimates and practice fixed effects from these regressions were used to predict the proportion of PA/NP visits per practice per year given a standard case mix. Least squares regressions, with practice fixed effects, were used to estimate the association of this standardized predicted proportion of PA/NP visits with average annual practitioner and total labor costs per visit, controlling for other practice characteristics. RESULTS: On average, PAs/NPs attended one in three adult medicine visits and one in five pediatric medicine visits. Likelihood of a PA/NP visit was significantly higher than average among patients presenting with minor acute illness (e.g., acute pharyngitis). In adult medicine, likelihood of a PA/NP visit was lower than average among older patients. Practitioner labor costs per visit and total labor costs per visit were lower (p<.01 and p=.08, respectively) among practices with greater use of PAs/NPs, standardized for case mix. CONCLUSIONS: Primary care practices that used more PAs/NPs in care delivery realized lower practitioner labor costs per visit than practices that used less. Future research should investigate the cost savings and cost-effectiveness potential of delivery designs that change staffing mix and division of labor among clinical disciplines.     

Primary care physician perceptions of the nurse practitioner in the 1990s.

OBJECTIVE: To evaluate factors associated with primary care physician attitudes toward nurse practitioners (NPs) providing primary care. DESIGN: A mailed survey of primary care physicians in Iowa. SETTING AND PARTICIPANTS: Half (N = 616) of the non-institutional-based, full-time, primary care physicians in Iowa in spring 1994. Although 360 (58.4%) responded, only physicians with complete data on all items in the model were used in these analyses (n = 259 [42.0%]). MAIN OUTCOME MEASURES: There were 2 principal dependent measures: physician attitudes toward NPs providing primary care (an 11-item instrument) and physician experience with NPs in this role. Bivariate relationships between physician demographic and practice characteristics were evaluated by chi 2 tests, as were both dependent variables. Ordinary least-squares regression was used to determine factors related to physician attitudes toward NPs. RESULTS: In bivariate analyses, physicians were significantly more likely to have had experience with an NP providing primary care if they were in pediatrics or obstetrics-gynecology (78.3% and 70.0%, respectively; P < .001), had been in practice for fewer than 20 years (P = .045), or were in practices with 5 or more physicians. The ordinary least-squares regression indicated that physicians with previous experience working with NPs providing primary care (P = .01), physicians practicing in urban areas with populations greater than 20,000 but far from a metropolitan area (P = .03), and general practice physicians (P = .04) had significantly more favorable attitudes toward NPs than did other primary care physicians. CONCLUSIONS: The association between previous experience with a primary care NP and a more positive attitude toward NPs has important implications for the training of primary care physicians, particularly in community-based, multidisciplinary settings.     

Examining attitudes of specialist physicians regarding physician assistant referrals

Referral of a patient from a primary care provider to a referral specialist physician for consultation is an important link in the continuum of patient care. Although the relationship between the physician assistant (PA) and supervising physician has been studied extensively, the effectiveness of the relationship between the primary care PA and the referral specialist physician is unclear. The purpose of this study was to examine the attitudes of the referral specialist physician toward direct referral of patients from primary care PAs. A random sample of 5,000 specialist physicians in five specialty areas across the United States were surveyed to determine their willingness to accept referrals from PAs, their attitudes about the appropriateness of PA referrals, and reasons for dissatisfaction, if any. Data analysis revealed that specialist physicians generally are willing to accept patient referrals from primary care PAs and that specialist physicians generally are satisfied with the appropriateness and timeliness of referrals from PAs. Whether or not the specialist physician employed (supervised) a PA in his or her own practice made a significant difference in level of satisfaction with PA referral. To determine the significance of these results, more research is needed to determine specialist physician satisfaction with referrals from primary care physicians compared with PAs.     

Convenient care clinics: the future of accessible health care.

The need for accessible, affordable, quality health care in the United States has never been greater. In response to this need, convenient care clinics (CCCs) are being launched across the country to help provide care to meet the basic health needs of the public. In CCCs, highly qualified health care providers diagnose and treat common health problems, triage patients to the appropriate level of care, advocate for a medical home for all patients, and reduce unnecessary visits to emergency rooms and Urgent Care Clinics. CCCs have been called a "disruptive innovation" because they are consumer driven. They serve as a response to many patients who are unhappy with the current conventional health care delivery system--a system that is challenged to provide access to basic health care services when people need it the most. CCCs are based in retail stores and pharmacies. They are primarily staffed by nurse practitioners (NPs). Some CCCs are staffed by physician assistants (PAs) and physicians. The authors acknowledge the important roles of both PAs and physicians in CCCs; however, this paper primarily provides education about the role of NPs in CCCs. CCCs have evolved at a time when our health care system is floundering, and the need for accessible, affordable health care is at its greatest. The CCC model provides an accessible, affordable entry point into the health care system for those who previously were restricted access.     

Trends in the supply of physician assistants and nurse practitioners in the United States

In 2001 an estimated 103,612 nurse practitioners (NPs) and physician assistants (PAs) were in clinical employment in the United States. The roles of PAs and NPs in providing comparable physician services are similar; they differ in that NPs are predominantly in primary care, while PAs are divided between primary and specialty care. PA and NP education processes also differ in the student pool and trends in the output. The combined number of graduates totaled 11,585 in 2001. However, the annual number of NP graduates is declining, while the number of PA graduates is increasing. These observations have implications for the future in the types of patients they see and the degree of health care services they provide.     

National estimates of physician assistant productivity

Analysis of productivity data from a nationally representative sample of physician assistants (PAs) showed that PAs performed 61.4 outpatient visits per week compared with 74.2 visits performed by physicians, for an overall physician full-time equivalent (FTE) estimate of 0.83. However, productivity of PAs varies strongly across practice specialty and location, with generalist PAs performing more visits than their specialist counterparts. Rural PA productivity is higher than urban productivity because of the concentration of generalist PAs in rural settings. A generalist PA physician FTE estimate of 0.75 appears to be more accurate than the 0.5 currently under consideration in proposed modifications to Health Personnel Shortage Area designation regulations.     

Health status and health professional visits in a rural area.

Visits to physicians (MDs), physician assistants (PAs) or nurse practitioners (NPs) by residents of a rural county in the upper-middle west of the United States were analysed in this study. A telephone survey yielded 250 responses. The dependent variable was the natural logarithm of the number of times the respondent had seen a health professional (MD, PA or NP) in the past two years. Predisposing, enabling and medical need variables were tested as potential predictors of visits. Self-rated health status, being unable to perform usual activities, and feeling upset or 'down in the dumps' proved to be important predictors, as was having a usual source of care. Health insurance coverage and family income was not, however. Unexpectedly, smokers also reported more visits. The implications for policy and future research are discussed.     

Efficacy Expectations for Colorectal Cancer Screening in Primary Care: Identifying Barriers and Facilitators for Patients and Clinicians

Physicians (MDs), nurse practitioners (NPs), and physician assistants (PAs) in primary care (PC) specialties, as well as patients, participated in a series of peer-level focus groups to explore how colorectal cancer (CRC) screening is approached in PC. Twenty-seven focus groups were conducted, including 8 groups composed of MDs (n = 56), 7 with NP/PAs (n = 47), and 12 with patients (n = 103). Clinicians (MDs, NPs, PAs) reported discussing CRC screening during well visits and were alerted to patients in need of screening through flow sheets, chart reminders (paper, electronic) or by office personnel, and cited lack of time, patient reluctance, and challenges related to scheduling colonoscopy as barriers to screening. Clinicians identified communication skills and the convenience of office-based screening procedures as facilitators of CRC screening. Patients recalled discussing CRC screening during PC office visits and most commonly identified colonoscopy and fecal occult blood test as common CRC screening tests. Physician recommendation and knowing someone who has/had cancer were the most common factors motivating patients' decision to complete CRC screening. Results are framed according to patient and clinician perceptions of self-efficacy related to CRC screening.     

Predictive modeling the physician assistant supply: 2010-2025

Objective

A component of health-care reform in 2010 identified physician assistants (PAs) as needed to help mitigate the expected doctor shortage. We modeled their number to predict rational estimates for workforce planners.

Methods

The number of PAs in active clinical practice in 2010 formed the baseline. We used graduation rates and program expansion to project annual growth; attrition estimates offset these amounts. A simulation model incorporated historical trends, current supply, and graduation amounts. Sensitivity analyses were conducted to systematically adjust parameters in the model to determine the effects of such changes.

Results

As of 2010, there were 74,476 PAs in the active workforce. The mean age was 42 years and 65% were female. There were 154 accredited educational programs; 99% had a graduating class and produced an average of 44 graduates annually (total n=6,776). With a 7% increase in graduate entry rate and a 5% annual attrition rate, the supply of clinically active PAs will grow to 93,099 in 2015, 111,004 in 2020, and 127,821 in 2025. This model holds clinically active PAs in primary care at 34%.

Conclusions

The number of clinically active PAs is projected to increase by almost 72% in 15 years. Attrition rates, especially retirement patterns, are not well understood for PAs, and variation could affect future supply. While the majority of PAs are in the medical specialties and subspecialties fields, new policy steps funding PA education and promoting primary care may add more PAs in primary care than the model predicts.Physician assistants (PAs) and nurse practitioners (NPs) are considered essential parts of the contemporary U.S. medical workforce.¹ As medical providers, PAs have been essential during times of physician shortages and, historically, it was a lack of doctors in underserved areas that first spurred their creation.² Once again, experts believe that the U.S. faces an insufficient cadre of physicians, with projections indicating that the supply will be unable to keep pace with demand; by 2025, a shortage of 124,000 primary care physicians is anticipated.^3,4 Consequently, analysts have suggested that there will be an increased reliance on PAs and NPs.^5,6Models developed to predict the supply of physicians under various scenarios are important for health planners. Because little research has included the supply of PAs and NPs in these projections, accurate numbers of clinically active providers are needed for rational medical workforce planning. Such key data could provide policy makers with needed information to augment physician services in both the specialty and primary care sectors of the medical workforce.     

Financial and organizational factors affecting the employment of nurse practitioners and physician assistants in medical group practices

This study examines the financial and organizational factors that are associated with the employment of nurse practitioners (NPs) and physician assistants (PAs) in medical group practices. The source of the data is a survey of 128 medical group practices in Minnesota. The findings suggest that the employment of NPs and PAs and their ratios to primary care physicians (PCPs) in practices that employ them are influenced by the organizational characteristics of the group practice but not by the degree of financial risk sharing for patient care. Although neither the number of years of experience in financial risk sharing nor more revenue from capitation payment contracts were related to employment of these midlevel practitioners (MLPs), large practices, those located in rural locations, not-for-profit practices, and those that scored low on cohesive cultural traits were more likely to employ MLPs. The data provide insights into the market for MLPs and the potential for these clinicians in the future health care system. As medical group practices become larger and have more organizational capacity, they can likely be expected to increase the employment of MLPs and integrate them into their organizations.     

National Ambulatory Medical Care Survey: 2001 summary

OBJECTIVE: This report describes ambulatory care visits made to physician offices in the United States. Statistics are presented on selected characteristics of the physician's practice, the patient, and the visit. Results highlighting new items on continuity of care are presented. They include whether the visit was the first or a followup for a problem, number of visits to this provider in the past 12 months for established patients, and whether other physicians shared care for the patient's problem. The report also highlights estimates of practice characteristics for office-based physicians. METHODS: The data presented in this report were collected from the 2001 National Ambulatory Medical Care Survey (NAMCS). NAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization by various types of providers. NAMCS is a national probability sample survey of visits to office-based physicians in the United States. Sample data are weighted to produce annual national estimates. Selected trends from the 1992 and 1997 NAMCS are also presented. RESULTS: During 2001, an estimated 880.5 million visits were made to physician offices in the United States, an overall rate of 314.4 visits per 100 persons. From 1992 through 2001, the visit rate for persons 45 years of age and over increased by 17%, from 407.3 to 478.2 visits per 100 persons. The mean age of patients at each office visit has steadily increased from 1992 through 2001 as has the mean number of diagnoses rendered and the overall drug mention rate. The visit rate to physician offices in metropolitan statistical areas (MSAs) (338.3 visits per 100 persons) was significantly larger than the rate in non-MSAs (218.0 visits per 100 persons). Females had a higher visit rate compared with males, and white persons had a higher rate than black or African-American persons. Half of all office visits were to the patient's primary care physician (PCP). Of the visits to physicians other than the patient's PCP, about one-third (32.6 percent) were referrals. About 1 in 10 office visits were made by new patients (11.8 percent), down 20% since 1992. More than one physician shared the care for the patient's condition at about one-fifth of the office visits. Of all visits made to offices in 2001, 58.8 percent listed private insurance as the primary expected source of payment, followed by Medicare (21.8 percent) and Medicaid and/or State Children's Health Insurance Program (7.2 percent). For preventive care visits, the female visit rate was over 75% higher than the rate for males (67.1 versus 37.7 visits per 100 persons). Essential hypertension, arthropathies, acute upper respiratory infection, and diabetes mellitus were the leading illness-related primary diagnoses. There were an estimated 99.8 million injury-related visits in 2001, or 35.6 visits per 100 persons. Diagnostic and screening services were ordered or provided at 82.8 percent of visits, therapeutic and preventive services were ordered or provided at 41.4 percent of visits, and medications were prescribed or provided at 61.9 percent of visits. On average, 2.4 medications were ordered or provided at each office visit with any mention of a medication. The leading therapeutic class for drugs mentioned at office visits included cardiovascular-renal drugs (14.7 percent of mentions) and pain-relieving drugs (12.1 percent of mentions). A physician was seen at a majority of visits (95.8 percent), and a registered or licensed practical nurse was seen at 31.3 percent of visits. From 1992 through 2001, changes were observed in the leading diagnoses, therapeutic drug classes, and drug mentions. Physician estimates revealed that primary care physicians were twice as likely as specialists to make home visits during an average week of work; when they conducted them, they made twice as many (6 versus 2-3 visits per week) as specialists. Approximately 3 in 10 physicians reported not accepting new capitated, privately insured patients, whereas only 6.8 percent did not accept noncapitated, privately insured patients.     

Growth of Physicians and Nurse Practitioners Practicing Full Time in Nursing Homes

ObjectivesThe objective was to describe the growth of physicians, nurse practitioners (NPs), and physician assistants (PAs) who practice full time in nursing homes, to assess resident and nursing home characteristics associated with receiving care from full-time providers, and describe variation among nursing homes in use of full-time providers.DesignRetrospective cohort study.Setting and ParticipantsA 20% national sample Medicare data on long-term care residents in 2008 to 2018 and the physicians, NPs, and PAs who submitted charges to Medicare for their care.MethodsWe measured the percentage of provider charges for services rendered in nursing homes, in addition to resident and facility characteristics.ResultsFull-time nursing home providers increased from 26.0% of all nursing home providers in 2008 to 44.6% in 2017. The largest increase was in NPs: from 1986 in 2008 to 4479 in 2017. Resident age, sex, Medicaid eligibility, and race/ethnicity had minimal association with the odds of having a full-time provider, whereas residents with an NP primary care provider were 23.0 times more likely (95% confidence interval = 21.6, 24.6) to have a full-time provider. Residents who received care from both a physician and an NP or PA increased from 33.6% in 2008 to 62.5% in 2018. There was large variation among facilities in the percentage of residents with full-time providers, from 5.72% of residents with full-time providers in the bottom quintile of facilities to 91.44% in the top quintile. Individual nursing homes accounted for 59% of the variation in whether a resident had a full-time provider.Conclusions and ImplicationsThe percentage of nursing home residents with full-time providers continues to grow, with very large variation among nursing homes.     

Physician extenders increase healthcare access

To ensure rural residents access to primary care services, Saint Vincent Hospital and Health Center, Billings, MT, operates five physician-operated clinics, located between 8 and 81 miles from Billings. Two of the clinics are in communities that are not large enough to sustain a physician practice, so they are staffed by certified physician assistants (PA-Cs). Licensed and practicing with supervision of a physician, PAs provide a variety of patient care services in virtually every medical specialty and environment. One-third of the nation's PAs work in primary care health professional shortage areas, providing services comparable to those of a family practitioner. National studies reveal a high degree of satisfaction among both consumers and supervising physicians regarding the level of care provided by PAs. Professional liability claims against PAs are fewer than those against physicians, probably because of the higher degree of communication and attention patients receive as a result of the team approach. PAs can increase patient contact hours, decrease waiting times, and improve access to care overall. In addition, PA utilization is a cost-effective approach to healthcare delivery.     

Peer Reviewed: Physician Visits and Colorectal Cancer Testing Among Medicare Enrollees in North Carolina and South Carolina, 2005

Introduction

Many Medicare enrollees do not receive colorectal cancer tests at recommended intervals despite having Medicare screening coverage. Little is known about the physician visits of Medicare enrollees who are untested. Our study objective was to evaluate physician visits of enrollees who lack appropriate testing to identify opportunities to increase colorectal cancer testing.

Methods

We used North Carolina and South Carolina Medicare data to compare type and frequency of physician visits for Medicare enrollees with and without a colorectal cancer test in 2005. Type of physician visit was defined by the physician specialty as primary care, mixed specialty (more than 1 specialty, 1 of which was primary care), and nonprimary care. We used multivariate modeling to assess the influence of type and frequency of physician visits on colorectal cancer testing.

Results

Approximately half (46.5%) of enrollees lacked appropriate colorectal cancer testing. Among the untested group, 19.8% had no physician visits in 2005. Enrollees with primary care visits were more likely to be tested than those without a primary care visit. Many enrollees who had primary care visits remained untested. Enrollees with visits to all physician types had a greater likelihood of having colorectal cancer testing.

Conclusions

We identified 3 categories of Medicare enrollees without appropriate colorectal cancer testing: those with no visits, those who see primary care physicians only, and those with multiple visits to physicians with primary and nonprimary care specialties. Different strategies are needed for each category to increase colorectal cancer testing in the Medicare population.