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At least 19 recordsLinked to original sources
PubMed1990

The effect of independent practice association plans on use of pediatric ambulatory medical care in one group practice.

We compared the use of pediatric ambulatory medical care of 640 children who switched from a traditional Blue Cross plan to more comprehensive independent practice association plans with that of matched patients who remained with Blue Cross in one large, suburban pediatric practice in Rochester, NY. A quasi-experimental, retrospective cohort design was used. Use of pediatric ambulatory medical care by patients in the independent practice association plan and control patients was determined by medical chart review for 1 year before and 1 year after each patient's switch. During the baseline year, patients who would join the independent practice association plan already had 19% more acute-illness visits than control patients. During the second year, patients in the independent practice association plan averaged 42% more acute-illness visits, 22% more well child-care visits, 93% more chronic-illness visits, 27% more after-hours visits, 53% more weekend visits, 185% more laboratory studies, and 70% more referrals. The shift toward independent practice association plans in this open-market setting increased use of ambulatory medical care for pediatric patients.

Ambulatory Care↗
PubMed1991

Comparing hospital length of stay in independent practice association HMOs and traditional insurance programs.

This study compares length of hospital stay in Independent Practice Association (IPA) HMOs and traditional insurance programs. Hospital admissions from 10 IPAs are compared with admissions to the same hospital of persons covered by Blue Cross and Blue Shield Plans or commercial insurance programs. Admissions of patients under age 65 to the adult medical service for the 10 most frequently occurring DRGs are included. Regression equations are estimated using length of stay as the dependent variable and IPA membership and hospital and patient characteristics as control variables. All 10 IPAs exhibit shorter lengths of stay as indicated by negative beta coefficients, and in 6 of the 10 IPAs this coefficient is statistically significant (p less than .05). This IPA effect occurs for 7 of the 10 study DRGs, and for MedisGroups Admission Severity Groups 0, 1, and 2.

Age Factors↗
PubMed1987

Use of ambulatory health care services in a preferred provider organization.

The organization of the delivery of health care can have significant cost-saving implications, but few of the available studies have made adequate comparisons of costs across plans. Furthermore, new organizational types such as independent practice associations and preferred provider organizations have not yet been studied in detail. This paper examines ambulatory utilization in a preferred provider organization (PPO) for Uniformed Services beneficiaries at Pacific Medical Center (PMC) in Seattle. The utilization in the PPO is compared with the results of a recently reported study of three other organizationally different Seattle plans: a Blue Cross/Blue Shield plan (BC), a closed-panel health maintenance organization (HMO), and an independent practice association (IPA). The PPO was similar to the IPA and the HMO in having a high percent of patients with any ambulatory use and had standardized ambulatory costs per user which were lower than BC but higher than the HMO. Thus, this particular type of PPO may have cost-saving features, particularly because the Uniformed Services population is known to use more health services than the general population. Methodological issues for future utilization research across organizations are also discussed.

Adolescent↗
PubMed1988

Hippocrates and the health maintenance organization. A discussion of ethical issues.

Health maintenance organizations (HMOs) are providing an increasing proportion of medical care in the United States. Characteristics of these organizations such as cost containment, incentives to reduce spending by practitioners, and barriers to access for clients raise significant ethical concerns. This paper considers how these features of the HMO withstand ethical scrutiny and what may be done to prevent abuse. Generally, the challenges to the moral integrity of physicians practicing in HMOs are neither intractable nor in all cases unique, although special arrangements may have to be made to ensure that ethical standards are upheld. Independent practice associations pose particular problems. Finally, whether or not an HMO is a for-profit enterprise is a significant consideration.

Clinical Competence↗
PubMed1990

The quality of ambulatory care in Medicare health maintenance organizations.

The quality of ambulatory care received by Medicare recipients who enrolled in health maintenance organizations (HMOs) was compared to the care received by fee-for-service (FFS) Medicare recipients, in a quasi-experimental, non-randomized design. Both samples were drawn from the four major geographic areas in the country, and included two types of HMO practices: staff/group models, and independent practice associations (IPAs). A panel of expert physicians developed criteria for evaluating ambulatory care, and medical record abstractions using these criteria were performed on 1,590 outpatient records: 777 FFS and 813 HMO (441 staff/group, 372 IPA). While individual items of medical histories and physical examinations were performed most often for staff/group HMO patients and least often in FFS patients, odds ratios (OR) for performance in staff/group HMO patients were particularly large for health maintenance items: tonometry (OR = 8.4), mammography (OR = 2.7), pelvic examination (OR = 5.3), rectal examination (OR = 2.9), fecal occult blood test (OR = 3.3). The results suggest that recommended elements of routine and preventive care are more likely to be performed for Medicare enrollees in staff/group HMOs than in FFS settings.

Aged↗
PubMed1989

Effect of a gatekeeper plan on health services use and charges: a randomized trial.

A randomized trial was conducted to determine the effectiveness of a health care plan which uses physicians as gatekeepers to control health services use and charges. New enrollees in United Healthcare (UHC), an independent practice association, were randomly assigned to the standard UHC plan requiring a gatekeeper, or to an alternate plan with equal benefits but without a gatekeeper. Individuals in both plans were similar in demographic characteristics, perceived health status, and other health insurance coverage. The gatekeeper plan had 6 percent lower total charges per enrollee than the plan without a gatekeeper. There were minor differences in hospital use and charges. Ambulatory charges were $21 lower per person per year in the plan with a gatekeeper (95% CI = -39.9, -2.1) and these were due to .3 fewer visits to specialists (95% CI = -0.50, -0.10). We conclude that a health plan which incorporates incentives and penalties for physicians to act as gatekeepers can reduce the cost of ambulatory services by limiting specialist visits.

Adolescent↗
PubMed1989

Differences in inpatient resource use by type of health plan.

Approximately 50% of the annual increase in hospital costs comes from increased resource use per hospital admission. Health maintenance organizations (HMOs), given their fixed financial resources for patient care, have an incentive to constrain their enrollees' use of hospital resources. Our analysis investigates differences in length of stay, total charges, and the ancillary to total charge ratio for hospitalized patients in network HMOs, independent practice associations (IPAs), and fee-for-service (FFS) health plans in the Twin Cities from 1982 to 1984. Network HMO patients in several diagnostic categories are found to use significantly fewer resources, once hospitalized, than patients in either IPA or FFS plans. This difference may give network HMOs a competitive advantage in the market for health plans.

Group Practice↗
PubMed1988

Implementation of an outpatient prescription drug formulary in a managed-care system.

The development and implementation of an outpatient prescription formulary in an independent-practice model health maintenance organization (HMO) and the role of the pharmacy and therapeutics (P&T) committee in the process are described. Approximately 600 physicians provide medical care and control the operation of this independent practice association (IPA); of approximately 45,000 members, 95% are eligible for outpatient prescription services provided by one of 188 local pharmacies. The formulary, which is restricted to noninjectable medications, was developed by a P&T committee composed of eight IPA physicians, a representative of the local pharmaceutical association, and three staff members of the IPA's pharmacy department. The printed version of the formulary indexed almost 1800 items and included only commonly used medications to limit its size. Requests for additions or deletions of drugs were evaluated monthly. After a four-month period during which physicians were asked to comply with the formulary, mandatory compliance was imposed, with a limit of 16 nonformulary prescriptions per physician per month being allowed. Based on the results of an informal survey, the physicians indicated that the formulary was relatively easy to adjust to (44.1%), somewhat difficult to work with (43.6%), and somewhat disruptive to their prescribing practices (55.3%). When asked about quality of patient care, 74.3% indicated there was no change. Physician compliance with the formulary system increased from 88.0% to 96.1% after the formulary was mandated by the IPA. Under the direction of the P&T committee, a formulary was implemented effectively in this HMO outpatient prescription drug program.

Delivery of Health Care↗
PubMed1992

Increased ambulatory utilization in IPA plans among children receiving hyposensitization therapy.

There is concern that children with chronic conditions are less likely to be enrolled in managed care systems and that they may not receive optimal care. We studied the relationship between enrollment in an Independent Practice Association (IPA) plan and utilization of ambulatory services among children in a suburban pediatric practice with one mild chronic condition--those receiving hyposensitization therapy for allergic diseases. Ambulatory utilization by IPA patients (N = 102) was determined by medical chart review for one year before and one year after each patient switched from Blue Cross to IPA coverage. Blue Cross hyposensitization patients (N = 57) matched for age served as controls. Patients receiving hyposensitization were more likely to have enrolled in an IPA than those not receiving hyposensitization (70% vs 45%, p < .001). Before enrollment pre-IPA patients had 41% fewer well-child care (WCC) visits than Blue Cross patients (p < .01); both underutilized WCC visits according to established guidelines. Controlling for age and baseline utilization, we found a significant increase in WCC and acute care visits after IPA enrollment (p < .05), but no change in hyposensitization visits or referrals. In this setting, there was no evidence for reduced access to ambulatory services but rather evidence for improved utilization of primary care.

Adolescent↗
PubMed1989

Physician productivity: trends and determinants.

Projections of a physician surplus for the 1990s have assumed that physician productivity will be constant at 1970s levels. Using the HCFA-NORC physician surveys of 1975, 1979, and 1984-85, this study examines trends in physician productivity over the past decade and estimates the impacts of physician and practice characteristics on current productivity. Visit productivity declined significantly between 1975 and 1984, suggesting that the projected surplus may be overstated. Cross-sectional results show that participation in alternative health plans is not associated with greater productivity, except for the higher work effort of independent practice association participants. The effects of physician time, nonphysician aides, and physician gender on productivity vary with alternative visit and revenues measures of productivity.

Cross-Sectional Studies↗
PubMed1989

Vision care benefits and optometric services in HMOs.

General eye care, although not a required basic health service of federally qualified health maintenance organizations (HMOs), is being offered in virtually all HMOs. Reasons for including vision care benefits and optometric services are presented. Data from the Group Health Association of America and the Department of Health and Human Services demonstrates that HMOs are in fact providing vision care benefits and optometric services. The growth of the independent practice association (IPA) model is significant for optometry as it threatens to limit the scope of optometric practice. New professional problems arise as participating optometrists are constrained from performing the full range of optometric services. In recent years optometry has expanded its scope of licensure and practice to incorporate both diagnostic and therapeutic drugs in its management of visual problems. Managed care and alternate delivery systems, however, may restrict the advances that optometry has made in the legislative arena.

Health Maintenance Organizations↗
PubMed1992

Contractual arrangements between residency programs and HMOs.

BACKGROUND: Although one out of seven health maintenance organizations (HMOs) is directly involved in graduate medical education (GME), either as an accredited sponsoring organization or through a contractual agreement with an academic medical center or teaching hospital to serve as an ambulatory rotation site, relatively little is known about the extent to which HMOs have provider contracts with faculty or residents of GME programs. Such provider contracts are not agreements to collaborate on the education of residents, but rather contractual arrangements under which individual physicians or groups (who happen to be residents or faculty) agree to provide services to HMO enrollees in return for some form of compensation. METHODS: In 1990, the Group Health Association of America conducted a survey of a sample of residency training programs in family medicine, internal medicine, and pediatrics to ascertain the extent to which (1) residents and faculty of residency training programs are participating physicians in HMOs; and (2) HMO enrollees are serving as the patient base for GME in ambulatory settings. RESULTS: Overall, 42% of the residency program respondents indicated that they contract with HMOs to provide services to enrollees. Nearly two thirds (64%) of family practice programs have provider contracts as compared with 28% of pediatrics programs and 24% of internal medicine programs. Provider contracts with independent practice associations are by far the most common, followed by group, network, and staff model contracts, in that order. CONCLUSIONS: It is apparent that provider contractual arrangements between HMOs and primary care residency programs are quite common, especially in the area of family practice. These contractual arrangements have probably resulted in a more predictable and stable patient revenue base for residency programs. The long-term effects on provider practice styles and the financing of graduate medical education are less clear.

Contract Services↗
PubMed1985

Use of outpatient somatic health services by patients who use or need mental health services in three provider plans.

A major topic in mental health (MH) research addresses the problem that patients who use mental health services have inappropriately high levels of somatic use, and examines whether provision of mental health services can decrease the inappropriate use (the so-called offset effect). However, the research showing higher somatic use by mental health patients has usually been unable to control for the patients' health status, or for their mental health status. In this paper we examine use of somatic health services by enrollees in three provider plans as a function of both mental health use and mental health need. In two of the provider plans (an HMO and a prepaid independent practice association), MH users used significantly more outpatient somatic services than non-MH patients, after control for age and sex, and after control for the number of chronic conditions they had. People with MH need, however, did not use significantly more MH services than those without MH need. In the third plan, a Blue Cross/Blue Shield type of plan, results were different; MH users did not have significantly higher somatic utilization after control for chronic conditions, and those with MH need did have significantly higher somatic utilization after control for age and sex, but not after control for the number of chronic conditions. These results suggest that the form of inappropriate use of outpatient somatic services, and the nature of an offset effect, may be specific to the type of insurance provided.

Adult↗
PubMed1979

Cost containment through risk-sharing by primary-care physicians.

A new type of independent practice association has been organized to encourage primary-care physicians in private practice to become coordinators and financial managers for all medical care. Each patient chooses one internist, family or general physician or pediatrician and must be referred by that physician for all specialized care. The primary-care physician authorizes payment from his own account for all care provided to his patients. He shares any dificit or surplus remaining at the end of the year. After four years of operation, United Healthcare has 610 primary-care physicians treating 23,000 patients. Total hospital use during 1978 and 293 bed-days per 1000 patients, as compared with 479 for Blue Cross. The hospital-admission rate per 1000 was 88, as compared with 101 for Blue Cross. Average lengths of stay were 3.3 and 4.7 dyas, respectively. This plan represents another means to control costs in the private medical marketplace.

Consumer Behavior↗
PubMed1986

Inpatient length of stay in Twin Cities health plans.

In this paper we examine the relationship between inpatient length of stay and the patient's type of health insurance. The data consist of discharges in seven diagnosis-related groups (DRGs) from community hospitals in Minneapolis and St. Paul during 1982. After controlling for the effects of the patient's age, sex, medical condition, and severity of illness, as well as the hospital's size, teaching and ownership status, and average annual occupancy rate, we must reject the null hypothesis that the patient's type of health plan is unrelated to inpatient length of stay in Twin Cities community hospitals. We find that, in most cases, patients in prepaid group practices and independent practice associations exhibit significantly shorter lengths of stay than similar patients in Blue Cross and commercial health insurance plans, while Medicare and Medicaid patients exhibit significantly longer lengths of stay than those of similar commercially insured patients.

Blue Cross Blue Shield Insurance Plans↗
PubMed1991

Behavioral interventions to increase adherence in colorectal cancer screening.

This investigation was a randomized controlled trial to determine the impact of health education interventions on the return of mailed fecal occult blood (FOB) tests (FOBT adherence) in a colorectal cancer screening program. The study sample included 2,201 men and women aged 50 to 74 years who were members of an Independent Practice Association (IPA)-type health maintenance organization (HMO). Subjects were randomly assigned to a "usual care" Control Group (advance letter, screening kit, reminder letter), and Treatment Groups 1 (usual care + reminder call), 2 (usual care + self-held screening booklet + reminder call), or 3 (usual care + self-held screening booklet + instruction call + reminder call). Bivariate analysis revealed significant differences in adherence (P less than .001) across study groups: Control Group (27%), Group 1 (37%), Group 2 (37%), Group 3 (48%). In addition, a significant positive association between age and adherence (P less than .001) was found. Logistic regression analysis revealed an interaction between sex and treatment. Adherence among men in all treatment groups increased significantly (P less than .0001) in relation to Control Group males. Men in Group 3 also were more likely to adhere than those in Group 2 (P less than .01) or Group 1 (P less than .01). Among women, adherence was significantly higher in Group 3 than in Group 2 (P less than .03), Group 1 (P less than .025), or the Control Group (P = .0008). The primary reason cited for nonadherence was perceived inconvenience of the FOB testing procedure.

Aged↗