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AHRQ Research Studies Date
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- Access to Care (2)
- Children/Adolescents (1)
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AHRQ Research Studies
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Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
Results
1 to 19 of 19 Research Studies DisplayedMeille G, Post B
AHRQ Author: Meille G
The effects of the Medicaid expansion on hospital utilization, employment, and capital.
This AHRQ-authored paper describes the effect of the Affordable Care Act Medicaid expansion on hospital utilization, employment, and capital. The authors conducted a difference-in-differences analysis that compared changes to hospital demand and supply in Medicaid expansion and nonexpansion states. They used 2010-2016 data from the American Hospital Association and the Healthcare Cost Report Information System to quantify changes to hospital utilization and characterize how hospitals adjusted labor and capital inputs. Medicaid expansion was associated with increases in emergency department visits and other outpatient hospital visits. They found strong evidence that hospitals met increases in demand by hiring nursing staff and weaker evidence that they increased hiring of technicians and investments in equipment. They found no evidence that hospitals adjusted hiring of physicians, support staff, or investments in other capital inputs.
AHRQ-authored.
Citation: Meille G, Post B .
The effects of the Medicaid expansion on hospital utilization, employment, and capital.
Med Care Res Rev 2023 Apr;80(2):165-74. doi: 10.1177/10775587221133165.
Keywords: Medicaid, Hospitals, Healthcare Utilization, Health Insurance, Policy, Access to Care, Uninsured
Dragan KL, Desai SM, Billings J
Association of insurance mix and diagnostic coding practices in New York state hospitals.
This study’s goal was to estimate whether, for the same Medicaid enrollee with multiple hospitalizations, a hospital's share of privately insured patients is associated with the number of diagnoses on claims since privately insured hospitals may invest more in intensive coding than hospitals serving publicly insured patients. This cross-sectional study used patient-level fixed effects regression models on inpatient Medicaid claims from Medicaid enrollees with at least 2 admissions in at least 2 different hospitals in the state of New York between 2010 and 2017. This analysis included 1,614,630 hospitalizations for Medicaid-insured patients (mean age, 48.2 years; 51.4% women and 48.6% men). Overall, 74,998 were Asian, 462,259 Black, 375,591 Hispanic, 486,313 White, 128,896 unknown, and 86,573 other. When the same patient was seen in a hospital with a higher share of privately insured patients, more diagnoses were recorded. Patients discharged from hospitals in the bottom quartile of privately insured patient share received 1.37 more diagnoses when they were subsequently discharged from hospitals in the top quartile, relative to patients whose admissions were both in the bottom quartile. This suggests that payment policy may drive differential investments in infrastructure to document diagnosis, causing a feedback loop that exacerbates resource inequity.
AHRQ-funded; T32HS000055; K01HS026980.
Citation: Dragan KL, Desai SM, Billings J .
Association of insurance mix and diagnostic coding practices in New York state hospitals.
JAMA Health Forum 2022 Sep 2;3(9):e222919. doi: 10.1001/jamahealthforum.2022.2919..
Keywords: Health Insurance, Hospitals
Eisenberg MD, Meiselbach MK, Bai G
Large self-insured employers lack power to effectively negotiate hospital prices.
This study examined the ability of self-insured employers to negotiate hospital prices and investigated the relationship between hospital prices and employer market power in the United States. Findings showed that employer market power was low in most metropolitan statistical areas. Recommendations included encouraging self-insured employers to consider building purchase alliances with state and local government employee groups in order to enhance their market power and to lower negotiated prices for hospital services.
AHRQ-funded; HS000029.
Citation: Eisenberg MD, Meiselbach MK, Bai G .
Large self-insured employers lack power to effectively negotiate hospital prices.
Am J Manag Care 2021 Jul;27(7):290-96. doi: 10.37765/ajmc.2021.88702..
Keywords: Health Insurance, Medicare, Medicaid, Healthcare Costs, Hospitals
Graves JA, Nshuti L, Everson J
Breadth and exclusivity of hospital and physician networks in US insurance markets.
The goal of this study was to quantify network breadth and overlap among primary care physician (PCP), cardiology, and general acute care hospital networks for employer-based (large group and small group), individually purchased (marketplace), Medicare Advantage (MA), and Medicaid managed care (MMC) plans. The main outcomes measured were percentage of in-network physicians and/or hospitals within a 60-minute drive from a hypothetical patient in a given zip code (breadth), and the number of physicians and/or hospitals within each network that overlapped with other insurers' networks, expressed as a percentage of the total possible number of shared connections (exclusivity). Networks were categorized by network breadth size and analyzed by insurance type, state, and insurance, physician, and/or hospital market concentration level, as measured by the Hirschman-Herfindahl index. Markets with concentrated primary care and insurance markets had the broadest and least exclusive primary care networks among large-group commercial plans. Markets with the least concentration had the narrowest and most exclusive networks. Rising levels of insurer and market concentration were associated with broader and less exclusive healthcare networks. The authors suggest that this means that patients could switch to a lower-cost, narrow network plan without losing-in-network coverage to their PCP.
AHRQ-funded; HS025976; HS026395.
Citation: Graves JA, Nshuti L, Everson J .
Breadth and exclusivity of hospital and physician networks in US insurance markets.
JAMA Netw Open 2020 Dec;3(12):e2029419. doi: 10.1001/jamanetworkopen.2020.29419..
Keywords: Health Insurance, Learning Health Systems, Health Systems, Primary Care, Hospitals, Healthcare Delivery
Everson J, Adler-Milstein J, Ryan AM
Hospitals strengthened relationships with close partners after joining accountable care organizations.
This study tested the hypothesis that hospitals participating in Medicare Accountable Care Organizations (ACOs) try to influence where their patients receive care in order to achieve quality and cost containment goals. The authors studied hospitals participating in ACO from 2010 to 2014. ACO hospitals shared patients 4.4% more than non-ACO hospitals. This occurred disproportionately at hospitals that already shared a high proportion of their patients prior to participation and among hospitals in ACOs characterized as physician-hospital collaborations.
AHRQ-funded; HS024525; HS024728.
Citation: Everson J, Adler-Milstein J, Ryan AM .
Hospitals strengthened relationships with close partners after joining accountable care organizations.
Med Care Res Rev 2020 Dec;77(6):549-58. doi: 10.1177/1077558718818336..
Keywords: Hospitals, Medicare, Policy, Health Insurance
Bucholz EM,, Schuster MA, Toomey SL
Trends in 30-day readmission for Medicaid and privately insured pediatric patients: 2010-2017.
This study examined trends in 30-day readmission rates for Medicaid and privately insured pediatric patients from 2010 to 2017. The HCUP Nationwide Readmissions Database was used to compare hospital-level risk-adjusted readmission rates. Higher readmission rates were found for Medicaid beneficiaires compared to privately insured pediatric patients during the time period.
AHRQ-funded; HS020513; HS025299.
Citation: Bucholz EM,, Schuster MA, Toomey SL .
Trends in 30-day readmission for Medicaid and privately insured pediatric patients: 2010-2017.
Pediatrics 2020 Aug;146(2). doi: 10.1542/peds.2020-0270..
Keywords: Healthcare Cost and Utilization Project (HCUP), Children/Adolescents, Hospital Readmissions, Health Insurance, Medicaid, Hospitals
Hoffman GJ, Yakusheva O
Association between financial incentives in Medicare's hospital readmissions reduction program and hospital readmission performance.
This study compared the outcome of penalties versus rewards to prevent hospital readmission in Medicare’s Hospital Readmissions Reduction Program (HRRP). This retrospective cohort study used Medicare readmissions data from 2823 US short-term acute care hospitals participating in HRRP. Data from pre-HRRP in 2016 was compared with 2016-2019 3-year follow-up readmission performance classified by tertile of hospitals using baseline marginal incentives for 5 HRRP-targeted conditions: acute myocardial infarction (AMI), heart failure, chronic obstructive pulmonary disease (COPD), pneumonia, and hip and/or knee surgery. Of the 2823 hospitals participating in HRRP from baseline to follow-up, 81% had more than 1 excess readmission for 1 or more applicable condition and 19% did not. Financial incentives ranged from a mean range of $8762 to $58,158 per 1 avoided readmission. Hospitals with greater incentives for readmission avoidance had greater decreases than hospitals with smaller incentives. An additional $5000 in the incentive amount was associated with up to a 26% decrease in readmissions. The findings suggest that incentives work better than penalties to reduce hospital readmissions for those 5 conditions.
AHRQ-funded; HS025838.
Citation: Hoffman GJ, Yakusheva O .
Association between financial incentives in Medicare's hospital readmissions reduction program and hospital readmission performance.
JAMA Netw Open 2020 Apr;3(4):e202044. doi: 10.1001/jamanetworkopen.2020.2044..
Keywords: Medicare, Hospital Readmissions, Provider Performance, Payment, Health Insurance, Hospitals
Sun EC, Mello MM, Moshfegh J
Assessment of out-of-network billing for privately insured patients receiving care in in-network hospitals.
This retrospective analysis used data from the Clinformatics Data Mart database (Optum) to examine out-of-network billing among privately insured patients with an inpatient admission or emergency department (ED) visit at in-network hospitals. The investigators found that out-of-network billing appeared to have become common for privately insured patients even when they soughttreatment at in-network hospitals. They indicated that the mean amounts billed appeared to be sufficiently large that they may create financial strain for a substantial proportion of patients.
AHRQ-funded; HS026128.
Citation: Sun EC, Mello MM, Moshfegh J .
Assessment of out-of-network billing for privately insured patients receiving care in in-network hospitals.
JAMA Intern Med 2019 Nov;179(11):1453-612. doi: 10.1001/jamainternmed.2019.3451..
Keywords: Health Insurance, Healthcare Costs, Payment, Hospitals, Emergency Department
Pickens G, Karaca Z, Gibson TB
AHRQ Author: Karaca Z, Wong HS
Changes in hospital service demand, cost, and patient illness severity following health reform.
This study examined the effects of expanded Medicaid coverage and the health insurance exchange on the number of hospital inpatient and emergency department (ED) utilization rates, cost, and patient illness severity. There was a significant drop in uninsured inpatient discharges and ED visits in states where Medicaid was expanded. For all by young females, uninsured inpatient discharge rates fell by 39% or greater. In nonexpansion states, the rates remained unchanged or increased slightly. Changes in all-payer and private insurance rates were not as dramatic, as was inpatient costs per discharge and all-payer inpatient costs.
AHRQ-authored; AHRQ-funded; 290201300002C.
Citation: Pickens G, Karaca Z, Gibson TB .
Changes in hospital service demand, cost, and patient illness severity following health reform.
Health Serv Res 2019 Aug;54(4):739-51. doi: 10.1111/1475-6773.13165..
Keywords: Access to Care, Health Insurance, Healthcare Cost and Utilization Project (HCUP), Healthcare Costs, Healthcare Utilization, Hospitals, Medicaid, Policy, Uninsured
Sankaran R, Sukul D, Nuliyalu U
Changes in hospital safety following penalties in the US Hospital Acquired Condition Reduction Program: retrospective cohort study.
This study evaluated the association between hospital penalization in the US Hospital Acquired Condition Reduction Program (HACRP) and changes in clinical outcomes. Out of the total of 724 hospitals were penalized in fiscal year 2015, 708 were included in the study. The majority of the penalized hospitals were large teaching institutions and have a greater share of low-income patients than non-penalized hospitals. After penalization, there was a non-significant change in hospital acquired conditions, 30-day readmission rates, and 30-day mortality. This might mean that disparities in care could be exacerbated.
AHRQ-funded; HS026244.
Citation: Sankaran R, Sukul D, Nuliyalu U .
Changes in hospital safety following penalties in the US Hospital Acquired Condition Reduction Program: retrospective cohort study.
BMJ 2019 Jul 3;366:l4109. doi: 10.1136/bmj.l4109..
Keywords: Health Insurance, Healthcare-Associated Infections (HAIs), Hospitals, Medicare, Patient Safety, Provider Performance, Payment, Quality of Care, Quality Indicators (QIs)
Hanson C, Herring B, Trish E
Do health insurance and hospital market concentration influence hospital patients' experience of care?
Researchers examined the effects of insurance and hospital market concentration on hospital patients' experience of care. They found that changes in patient satisfaction are positively associated with increases in insurance concentration and negatively associated with increases in hospital concentration. They concluded that their findings add to the evidence on the harms of hospital consolidation but suggest that insurer consolidation may improve patient experience.
AHRQ-funded; HS026333.
Citation: Hanson C, Herring B, Trish E .
Do health insurance and hospital market concentration influence hospital patients' experience of care?
Health Serv Res 2019 May 16;54(4):805-15. doi: 10.1111/1475-6773.13168..
Keywords: Consumer Assessment of Healthcare Providers and Systems (CAHPS), Health Insurance, Hospitals, Patient Experience, Quality of Care, Quality Improvement
Basu J, Hanchate A, Bierman A
AHRQ Author: Basu J, Bierman A
Racial/ethnic disparities in readmissions in US hospitals: the role of insurance coverage.
This study examined differences in rates of 30-day readmissions across patients by race/ethnicity and the extent to which these differences were moderated by insurance coverage. It found higher readmission risk for non-Hispanic blacks, compared with non-Hispanic whites, among those covered by Medicare and private insurance, but lower risk among uninsured and similar risk among Medicaid.
AHRQ-authored.
Citation: Basu J, Hanchate A, Bierman A .
Racial/ethnic disparities in readmissions in US hospitals: the role of insurance coverage.
Inquiry 2018 Jan-Dec;55:46958018774180. doi: 10.1177/0046958018774180.
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Keywords: Disparities, Health Insurance, Healthcare Cost and Utilization Project (HCUP), Hospitals, Hospital Readmissions
Adrion ER, Kocher KE, Nallamothu BK
Rising use of observation care among the commercially insured may lead to total and out-of-pocket cost savings.
Using multipayer commercial claims for the period 2009-13, the investigators evaluated utilization and spending among patients admitted for six conditions that are commonly managed with either observation care or short-stay hospitalizations. In their study period, the use of observation care increased relative to that of short-stay hospitalizations. In addition, total and out-of-pocket spending were substantially lower for observation care, though both grew rapidly--and at rates much higher than spending in the inpatient setting--over the study period.
AHRQ-funded; HS000053.
Citation: Adrion ER, Kocher KE, Nallamothu BK .
Rising use of observation care among the commercially insured may lead to total and out-of-pocket cost savings.
Health Aff 2017 Dec;36(12):2102-09. doi: 10.1377/hlthaff.2017.0774..
Keywords: Health Insurance, Healthcare Costs, Healthcare Delivery, Healthcare Utilization, Hospitalization, Hospitals, Medicare
Woodworth L, Romano PS, Holmes JF
Does insurance status influence a patient's hospital charge?
The objective of this study was to determine whether hospitals charge patients differently based on their insurance status. It concluded that conditional on patient characteristics, length of stay, and expected intensity of resource utilization, patients with private insurance and patients with Medicare were charged more (before discounting) than their uninsured counterparts within the same hospital.
AHRQ-funded; HS022236.
Citation: Woodworth L, Romano PS, Holmes JF .
Does insurance status influence a patient's hospital charge?
Appl Health Econ Health Policy 2017 Jun;15(3):353-62. doi: 10.1007/s40258-017-0308-z.
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Keywords: Healthcare Costs, Health Insurance, Hospitals, Medicare, Uninsured
Carey K, Dor A
http://www.healthfinancejournal.com/index.php/johcf/article/view/114
Price variations and their trends in U.S. hospitals.
This study tracked trends in prices paid to hospitals by commercial insurers over the period 2008 to 2014 using private sector claims data that contain actual payments. It contrasted these with trends in the CMS published charges. Results indicated that variation in actual commercially-transacted prices is substantially lower than variation in published charges.
AHRQ-funded; HS023610.
Citation: Carey K, Dor A .
Price variations and their trends in U.S. hospitals.
J Health Care Finance 2017 Sum;44(1).
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Keywords: Healthcare Costs, Payment, Health Insurance, Hospitals
Popescu I, Heslin KC, Coffey RM
AHRQ Author: Heslin KC, Washington RE
Differences in use of high-quality and low-quality hospitals among working-age individuals by insurance type.
This study found that compared with patients who have private insurance, those with Medicaid or no insurance were more likely to be minorities and to reside in areas with low-socioeconomic status. The probability of admission to high-quality hospitals was similar for patients with Medicaid (23.3 percent) and private insurance (23.0 percent) but was significantly lower for patients without insurance (19.8 percent) compared with the other 2 insurance groups.
AHRQ-authored.
Citation: Popescu I, Heslin KC, Coffey RM .
Differences in use of high-quality and low-quality hospitals among working-age individuals by insurance type.
Med Care 2017 Feb;55(2):148-54. doi: 10.1097/mlr.0000000000000633.
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Keywords: Healthcare Cost and Utilization Project (HCUP), Health Insurance, Disparities, Quality of Care, Hospitals
Woodworth L
A leak in the lifeboat: the effect of Medicaid managed care on the vitality of safety-net hospitals.
Woodworth estimated the impact of Medicaid managed care on safety-net hospitals by exploiting a Florida pilot program that required Medicaid recipients in five counties to enroll in managed care. The results suggested that this mandate led to a small reduction in safety-net hospitals' average ratio of payment-to-cost and that the effect on safety-net hospitals was disproportionate.
AHRQ-funded; HS022236.
Citation: Woodworth L .
A leak in the lifeboat: the effect of Medicaid managed care on the vitality of safety-net hospitals.
J Regul Econ 2016 Dec;50(3):251-70. doi: 10.1007/s11149-016-9312-8.
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Keywords: Hospitals, Medicaid, Health Insurance
Brown TT, Robinson JC
Reference pricing with endogenous or exogenous payment limits: impacts on insurer and consumer spending.
The authors extended reference pricing (RP) models to a hospital context focusing on insurer and consumer payments. They found that, for 2 years following RP implementation, insurer payments to high-price and low-price hospitals moved downward, consistent with endogenous RP. When the reference price was not reset to account for changes in market prices, insurer payments to low-price hospitals reverted to pre-implementation levels, consistent with exogenous RP.
AHRQ-funded; HS022098.
Citation: Brown TT, Robinson JC .
Reference pricing with endogenous or exogenous payment limits: impacts on insurer and consumer spending.
Health Econ 2016 Jun;25(6):740-9. doi: 10.1002/hec.3181.
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Keywords: Payment, Healthcare Costs, Health Insurance, Hospitals
Trish EE, Herring BJ
How do health insurer market concentration and bargaining power with hospitals affect health insurance premiums?
The authors examined the relationship between employer-sponsored fully-insured health insurance premiums and the level of concentration in local insurer and hospital markets using the nationally-representative 2006-2011 KFF/HRET Employer Health Benefits Survey. They found that premiums are higher for plans sold in markets with higher levels of concentration relevant to insurer transactions with employers, lower for plans in markets with higher levels of insurer concentration relevant to insurer bargaining with hospitals, and higher for plans in markets with higher levels of hospital market concentration.
AHRQ-funded; HS000046.
Citation: Trish EE, Herring BJ .
How do health insurer market concentration and bargaining power with hospitals affect health insurance premiums?
J Health Econ 2015 Jul;42:104-14. doi: 10.1016/j.jhealeco.2015.03.009.
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Keywords: Health Insurance, Healthcare Costs, Payment, Health Insurance, Hospitals