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2026 ACG User Summit
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An economic analysis of secure messaging between patients and providers

Seattle, WA, USA: University of Washington (doctoral dissertation). University of Washington, Seattle, WA, USA This dissertation presents an economic analysis of patient-provider communication through secure […]

Comorbilidad y discapacidad en pacientes con insuficiencia cardiaca

Madrid, Spain: Universidad Autonoma de Madrid (doctoral dissertation). Published in Spanish. Universidad Autonoma de Madrid, Madrid, Spain INTRODUCCIÓN: La insuficiencia cardiaca (IC) es un problema […]

Thiazolidinedione use and risk of hospitalization for pneumonia in type 2 diabetes:  population based matched case-control study

F1000Research 2:145. Department of Medicine, Johns Hopkins University Schools of Medicine and Public Health, Baltimore, MD, USA OBJECTIVE: Previous randomized clinical trials and their meta-analyses […]

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Case Mix Adjustment Case Study – Payer

This Case Study shows how Leicester City CCG, one of the most ethnically diverse areas of the UK, analyzed emergency admission rates for all practices, to learn that practices with lower emergency admission rates had significantly higher coding completeness and GP patient survey scores. Learn more.

Facilitating Equity and Efficiency in Primary Health Care

Johns Hopkins University Facilitating Equity & Efficiency in Primary Health Care, Malaysia using the ACG Case Mix System Dr Karen Kinder Executive Director

Tuesday-Re-thinking ACG fundamentals-Kitching and Heim

HealthPartners Risk Adjustment in Total Cost of Care & Resource Use: Re-Thinking Risk Adjustment Chad Heim Gary Kitching

Monday-US Health Reform-Ewald

Minnesota Department of Human Services The MN Health Care Home Initiative and ACG Dean Ewald

Monday-Care Coordination II-Haas

Mayo Clinic Assessment of Risk Stratification Methods Identifying Patients for Care Coordination within a Medical Home Lindsey R. Haas, MPH

Pilot study using Risk Stratification in Thames

Richmond Clinical Commissioning Group Using ACG to Support Delivery of Integrated Care Anna Raleigh, Consultant in Public Health Dr Caoimhe O Sullivan, Public Health Principal […]

Health Insurance Marketplace

DST Health Solutions Health Insurance Marketplace Amy Salls

Monday(C4)-Identifying Near Term Heath Cost Risk in the Absence of Claims Data—Bernard Khomenko

Identifying Near Term Heath Cost Risk  in the Absence of Claims Data   —Bernard Khomenko, CEBS Vice President of Client Solutions, Data Smart Solutions 

Tuesday(C8)-Using the ACG Software for a Full Picture of Population Risk Under the Accountable Care Act (ACA)-Salls and Bodycombe

Using the ACG Software for a Full Picture of Population Risk Under the Accountable Care Act (ACA) —Amy Salls, DST Health Solutions  David Bodycombe, Johns […]

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The Future of the ACG System

Hadi Kharrazi, MD, PhD, Assistant Professor Health Policy and Management, Johns Hopkins Bloomberg School of Public Health talks about EMRs, other future data sources and […]

Post-acute pathways among hip fracture patients: a system-level analysis

Background: Hip fractures among older adults are one of the leading causes of hospitalization and result in significant morbidity, mortality, and health care use. Guidelines […]

Examination of Health System Resources and Costs Associated With Transitioning Cancer Survivors to Primary Care: A Propensity-Score–Matched Cohort Study

Background: Transitioning low-risk cancer survivors back to their primary care provider (PCP) has been shown to be safe but the effect on health system resources […]

Using EMRALD to assess baseline body mass index among children living within and outside communities participating in the Ontario, Canada Healthy Kids Community Challenge

Abstract   Objectives The Healthy Kids Community Challenge is a large-scale, centrally-coordinated, community-based intervention in Ontario, Canada that promotes healthy behaviours towards improving healthy weights […]

The Association Between Continuity of Primary Care and Preventive Cancer Screening in Women With Intellectual Disability

Abstract Women with intellectual disability have low screening rates for breast and cervical cancer. This population-based cohort study examined the association between the level of […]

The Lifestyle Medicine Physician’s Case to Self-Insured Employers: A Business Model for Physicians, a Bargain for Companies

Abstract   A majority of Americans have health care insurance through their employers, the cost for which is rising at an alarming rate. Unfortunately, higher […]

Predicting Short-Term Outcomes After Radical Cystectomy Based on Frailty

Abstract Objective To evaluate the impact of frailty on adverse perioperative outcomes in patients treated with radical cystectomy for bladder cancer. Material and Methods We […]

Production of physician services under fee‐for‐service and blended fee‐for‐service: Evidence from Ontario, Canada

Abstract We examine family physicians’ responses to financial incentives for medical services in Ontario, Canada. We use administrative data covering 2003–2008, a period during which […]

Patient frailty predicts worse perioperative outcomes and higher cost after radical cystectomy

Abstract Background Relatively few studies investigated the importance of frailty in radical cystectomy (RC) patients. We tested the ability of frailty, using the Johns Hopkins […]

Patient-reported symptoms following diagnosis in esophagus cancer patients treated with palliative intent

Summary The majority of patients with esophagus cancer have advanced-stage disease without curative options. For these patients, treatment is focused on improving symptoms and quality […]

Peri‐complication diagnosis of hepatitis C infection: Risk factors and trends over time

Abstract Background & Aims Hepatitis C virus (HCV) is a common and treatable cause of cirrhosis and its complications, yet many chronically infected individuals remain […]

Using Health Plan Authorization Data to Predict Hospitalizations and Readmissions in a Combined Commercial and Medicaid Population

Abstract Health plans develop predictive models to predict key clinical events (eg, admissions, readmissions, emergency department visits). The authors developed predictive models of admissions and […]

Association between socioeconomic deprivation and surgical complications in adults undergoing ankle fracture fixation: a population-based analysis

Abstract Background Few studies have investigated the outcomes of surgical fracture care among socially deprived patients despite the increased incidence of fractures and the inequality […]

Breast cancer diagnosis and treatment wait times in specialized diagnostic units compared with usual care: a population-based study

Abstract Background Breast assessment sites (bass) were developed to provide expedited and coordinated care for patients being evaluated for breast cancer (bca) in Ontario. We […]

Epidemiology and Impact of Spinal Cord Injury in the Elderly: Results of a Fifteen-Year Population-Based Cohort Study

Abstract Objective Although experience suggests a shift in the epidemiology of spinal cord injury (SCI) toward an older demographic, population studies are lacking. We aimed […]

Systematic review on the instruments used for measuring the association of the level of multimorbidity and clinically important outcomes

ABSTRACT Objectives There are multiple instruments for measuring multimorbidity. The main objective of this systematic review was to provide a list of instruments that are […]

Inequities in access to primary care among opioid recipients in Ontario, Canada: A population-based cohort study

Abstract Background Stigma and high-care needs can present barriers to the provision of high-quality primary care for people with opioid use disorder (OUD) and those […]

Prevalence, determinants, and outcomes of SARS-COV-2 infection among cancer patients. A population-based study in northern Italy

Abstract Background It is well established that cancer patients infected with SARSCoV-2 are at particularly elevated risk of adverse outcomes, but the comparison of SARS-CoV-2 […]

Outcomes after the regionalization of care for high-grade endometrial cancers: a population-based study

Abstract Background In June 2013, Ontario Health (Cancer Care Ontario), the agency responsible for advancing cancer care in Ontario, Canada, published practice guidelines recommending that […]

Pre-operative wait times in high-grade non-endometrioid endometrial cancer: Do surgical delays impact patient survival?

Abstract Objective Practice guidelines advocating for regionalization of endometrial cancer surgery to gynecologic oncologists practicing in designated gynecologic oncology centres were published in Ontario in […]

Patterns Of Multimorbidity Of Patients In Geriatric Care – A Register-Based Cohort Study In Sweden

Abstract Background Patients in geriatric care display a high degree of multimorbidity. We aimed to explore and visualise various patterns of multimorbidity in a person-oriented […]

Impact of Social Needs in Electronic Health Records and Claims on Health Care Utilization and Costs Risk-Adjustment Models Within Medicaid Population

Abstract Patients enrolled in Medicaid have significantly higher social needs (SNs) than others. Using claims and electronic health records (EHRs) data, managed care organizations (MCOs) […]

Creating a Cost-map From Claims Data to Guide Improvement Actions for Children With Asthma

Abstract Purpose It is difficult to reduce cost and improve quality without knowledge pertaining to the distribution of expenses in the population in question. We […]

Effect of sustained virologic response on liver-related mortality among individuals living with hepatitis C by treatment era: A population-based retrospective cohort study

Abstract Purpose Sustained virologic response (SVR) is a validated surrogate marker for successful hepatitis C virus (HCV) treatment. Historically, interferon-based therapies, the standard of care […]

Risk Profile of Young Adults with Chronic Obstructive Pulmonary Disease

Abstract Background: COPD risk profiles have been described in populations comprised of or including older adults, leaving factors associated with COPD in younger adults overlooked. […]

Variations in multimorbidity measurement in studies evaluating hospitalisation in older adults: a systematic review

Abstract Background Multimorbidity is the coexistence of two or more chronic diseases, and in older adults is more common which can lead to increased rates […]

Risk Adjustment in Capitation Payments to Primary Care Providers

Abstract Background: One of the critical challenges with capitation payment to primary care providers is ensuring that the fixed payments are equitable and adjusted for […]

Patterns of care of gestational trophoblastic disease in Ontario: a population-based study

Abstract Objectives Gestational trophoblastic disease (GTD) is a rare condition that affects reproductive-age women with excellent clinical outcomes if treated appropriately. The study aims to […]

Surgeon-patient Sex Concordance and Long-term Clinical Outcomes and Costs Following Common Surgeries

Abstract Objective: To evaluate the associations between surgeon-patient sex concordance, long-term clinical outcomes and healthcare costs. Background Data: Emerging data suggest surgeon-patient sex concordance may […]

Adolescent Gynecologic and Reproductive Morbidity and Incident Chronic Pelvic Pain in Adulthood: A Population-Based Matched Cohort Study

Abstract Background: Chronic pelvic pain (CPP) is often described as a multisystem pain condition, yet population-level evidence on adolescent antecedents is scarce. We examined whether […]

Does End-of-Life Care Differ for Anglophones and Francophones? A Retrospective Cohort Study of Decedents in Ontario, Canada

Abstract Background: Approximately half of decedents in Ontario, Canada, receive some palliative care, but little is known about the influence of language on the nature of […]

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Identifying High Risk COVID-19 Patients Q&A

During the current health care crisis, health systems, health plans and governments urgently need to identify their most vulnerable patient populations. The Johns Hopkins ACG […]

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Predictive Modeling Part I – An Introduction to the Basics

This webinar is an introduction to the basics of predictive modelling and provides an overview of the predictive models that are available within the Johns […]

Comparative effectiveness of olmesartan and other angiotensin receptor blockers in diabetes mellitus: retrospective cohort study

Hypertension 63:977-983. University of Alberta, Edmonton, AB, Canada Olmesartan has been linked with increased risk of cardiovascular mortality and sprue-like enteropathy. We compared outcomes between […]

Variations in primary care physician referral rates

Health Serv Res 34:323-329. University of Rochester, Rochester, NY, USA OBJECTIVE: To examine primary care physician referral rate variations, including their extent and their stability […]

Increased suicidal activity following major trauma: a population-based study

J Trauma Acute Care Surg 76:180-184. University of Manitoba, Winnipeg, MB, Canada; University of California San Diego, San Diego, CA, USA; University of Regina, Regina, […]

Multimorbidity in risk stratification tools to predict negative outcomes in adult population

Eur J Intern Med 26:182-189. Basque Institute for Healthcare Innovation, Barakaldo, Spain; Università Cattolica del Sacro Cuore, Rome, Italy; Agenzia Italiana del Farmaco (AIFA), Rome, […]

Direct medical costs and source of cost differences across the spectrum of cognitive decline: A population-based study

Alzheimers Dement. Mayo Clinic, Rochester, MN, USA; K Long Health Economics Consulting LLC, St. Paul, MN, USA; AbbVie, North Chicago, IL, USA BACKGROUND: Objective cost […]

Physicians and prepaid group practices

Health Aff W4:76-78. Commonwealth Fund, New York, NY, USA Prepaid group practices (PGPs) are complex organizations that directly combine prepayment for health care with a […]

Impact of case mix severity on quality improvement in a patient-centered medical home (PCMH) in the Maryland Multi-Payor Program

J Am Board Fam Med 29:116-125. University of Maryland School of Medicine, Baltimore, MD, USA; University of Maryland School of Pharmacy, Baltimore, MD, USA; Department […]

A population-based study comparing patterns of care delivery on the quality of care for persons living with HIV in Ontario

BMJ Open 5:e007428. Bruyère Research Institute, Ottawa, ON, Canada; University of Ottawa, Ottawa, ON, Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada; Institute for Clinical […]

Trends and determinants of prescription drug use during pregnancy and postpartum in British Columbia, 2002-2011: a population-based cohort study

PLoS One 10:e0128312. University of British Columbia, Vancouver, BC, Canada PURPOSE: To describe trends, patterns, and determinants of prescription drug use during pregnancy and postpartum. […]

The use of long-acting beta2- agonists as monotherapy in children and adults

J Popul Ther Clin Pharmacol 20:e1. University of British Columbia, Vancouver, BC, Canada; St. Paul’s Hospital, Vancouver, BC, Canada BACKGROUND: In asthma, it is recommended […]

Selection bias from requiring patients to give consent to examine data for health services research

Arch Fam Med 9:1111-1118. Department of Family Practice, Medical College of Virginia, Virginia Commonwealth University, Fairfax, VA, USA BACKGROUND: New rulings nationwide require health services […]

Adjusted Clinical Groups: predictive accuracy for Medicaid enrollees in three states

Health Care Financ Rev 24:43-61. Rollins School of Public Health, Emory University, Atlanta, GA, USA Actuarial split-sample method were used to assess predictive accuracy of […]

The effect of socioeconomic status on bone density testing in a public health-care system

Osteoporos Int 18:153-158. Radiology, University of Manitoba, Winnipeg, MB, Canada INTRODUCTION AND HYPOTHESIS: An inverse relationship exists between socio-economic status (SES) and osteoporotic fractures. In […]

Medical and psychosocial diagnoses in women with a history of intimate partner violence

Arch Intern Med 169:1692-1697. Department of Human Development and Family Science, Ohio State University, Columbus, OH, USA BACKGROUND: We characterized the relative risk of a […]

Heart failure in the family practice: a study of the prevalence and co-morbidity

Fam Pract 28:128-133. Unidad de Bioingenieria y Telemedicina, Hospital Universitario Puerta de Hierro, Majadahonda, Spain BACKGROUND: Heart failure (HF) is a health problem that particularly […]

Adapting the Rx-Risk-V for mortality prediction in outpatient populations

Med Care 44:793-797. Houston Center for Quality of Care and Utilization Studies, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA OBJECTIVES: We sought […]

Multimorbidity and its measurement

Health Policy 103:3-8. Department of Health Policy and Management, Johns Hopkins University, Baltimore, MD, USA Multimorbidity is increasing in frequency. It can be quantitatively measured […]

Explaining primary healthcare pharmacy expenditure using classification of medications for chronic conditions

Health Policy 103:9-15. Research Centre for Health Care Economics and Management, Universitat Politècnica de València, Valencia, Spain BACKGROUND: The Valencian Autonomous Community (Spain) has implemented […]

Randomized trial of depression follow-up care by online messaging

J Gen Intern Med 26:698-704. Group Health Research Institute, Seattle, WA, USA BACKGROUND: Quality of antidepressant treatment remains disturbingly poor. Rates of medication adherence and […]

Types of morbidity and categories of patients in a Swedish county. Applying the Johns Hopkins Adjusted Clinical Groups System to encounter data in primary health care

Scand J Prim Health Care 22:174-179. Center for Family Medicine, Department of Clinical Science, Karolinska Institute, Stockholm, Sweden OBJECTIVE: To elucidate types of morbidity and […]

Medical comorbidity among youth diagnosed with bipolar disorder in the United States

J Clin Psychiatry 70:1461-1466. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA OBJECTIVE: This study examines the […]

Common comorbidity scales were similar in their ability to predict health care costs and mortality

J Clin Epidemiol 57:1040-1048. Indiana University Center for Aging Research, Indianapolis, IN, USA OBJECTIVE: To compare the ability of commonly used measures of medical comorbidity […]

Diagnostic scope of and exposure to primary care physicians in Australia, New Zealand, and the United States: cross sectional analysis of results from three national surveys

BMJ 334:1261. Division of General Internal Medicine, University of California San Francisco, San Francisco General Hospital, San Francisco, CA, USA. OBJECTIVES: To compare mix of […]

Influence of body mass index on the choice of therapy for depression and follow-up care

Obesity 21:e303-e313. Group Health Research Institute, Group Health Cooperative, Seattle, WA, USA OBJECTIVE: Overweight and obese patients commonly suffer from depression and choice of depression […]

Adverse events in elderly users of antipsychotic pharmacotherapy in the province of Manitoba: a retrospective cohort study

J Clin Psychopharmacol 33:24-30. University of Manitoba, Winnipeg, MB, Canada. BACKGROUND: Antipsychotic medications have been widely used in elderly patients for treatment of a variety […]

Emergency department use by the rural elderly

J Emerg Med 18:289-297. Department of Family Medicine, University of Washington, Seattle, WA, USA This study uses Medicare data to compare emergency department (ED) use […]

The potential of risk adjustment for the Military Health System TRICARE Program

Mil ed 170:964-971. AdvanceMed/CSC, Plaza America Drive, Reston, VA, USA Using industry leading methods and software products, this article explores the potential for health risk […]

The effects of interdisciplinary outpatient geriatrics on the use, costs and quality of health services in the fee-for-service environment

Aging Clin Exp Res 20:556-561. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA BACKGROUND AND AIMS: To evaluate the effect of interdisciplinary outpatient […]

The relationship between effectiveness and costs measured by a risk-adjusted case-mix system: multicentre study of Catalonian population data bases

BMC Public Health 9:202. Directorate of Planning, Badalona Serveis Assistencials SA, Badalona, Barcelona, Spain BACKGROUND: The main objective of this study is to measure the […]

Adjusted Clinical Groups use at a Spanish primary care center: a retrospective, population-based study

Rev Panam Salud Publica 27:49-55. Published in Spanish. Dirección de Planificación, Badalona Serveis Assistencials, S.A., Barcelona, Spain OBJECTIVES: To evaluate the results of implementing a […]

What is the comparative health status and associated risk factors for the Metis? A population-based study in Manitoba, Canada

BMC Public Health 11:814. Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada BACKGROUND: Métis are descendants of early 17th century relationships between […]

Impact of bariatric surgery on health care utilization and costs among patients with diabetes

Med Care 50:58-65. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA BACKGROUND: The effect of bariatric surgery […]

Case-mix adjusting performance measures in a veteran population: pharmacy- and diagnosis-based approaches

Health Serv Res 38:1319-1337. VA Puget Sound Health Care System, Seattle, WA, USA OBJECTIVE: To compare the rankings for health care utilization performance measures at […]

Risk adjusting capitation: applications in employed and disabled populations

Health Care Manag Sci 3:101-109. Department of Health Services, University of Washington, Seattle, WA, USA Risk adjustment may be a sensible strategy to reduce selection […]

Use of risk adjustment in setting budgets and measuring performance in primary care I: how it works

BMJ 323:604-607. School of Public Policy, University College London, London, UK No abstract PMID: 11557709 PMCID: PMC55577

Are low-income elderly patients at risk for poor diabetes care?

Diabetes Care 27:1060-1065. Colorado Foundation for Medical Care, Denver, CO, USA OBJECTIVE: Diabetes is common among low-income elderly, dual-eligible (DE) Medicare/Medicaid patients resulting in significant […]

Obtaining the mean relative weights of the cost of care in Catalonia (Spain): retrospective application of the Adjusted Clinical Groups case-mix system in primary health care

J Eval Clin Pract 19:267-276. Directorate of Planning, Badalona Serveis Assistencials SA, Badalona, Spain OBJECTIVE: The study aims to obtain the mean relative weights (MRWs) […]

Exploratory analysis of high CT scan utilization in claims data

J Am Coll Radiol 11:51-58. University of Minnesota, Minneapolis, MN. USA; Arizona State University, Tempe, AZ, USA PURPOSE: This study explores characteristics that distinguish higher […]

Increased risk of complications following total joint arthroplasty in patients with rheumatoid arthritis

Arthritis Rheumatol 66:254-263. University of Toronto, Toronto, ON, Canada OBJECTIVE: Most of the evidence regarding complications following total hip arthroplasty (THA) and total knee arthroplasty […]

High-risk case identification for use in comprehensive complex care management

Popul Health Manag. Clalit Research Institute , Chief Physician’s Office, Clalit Health Services, Tel Aviv, Israel . The current study aimed to develop a patient […]

Association of the Hospital Volume of Frail Surgical Patients Cared for with Outcomes after Elective, Major Noncardiac Surgery

Background: Frailty is a risk factor for adverse postoperative outcomes. Hospitals that perform higher volumes of surgery have better outcomes than low-volume providers. We hypothesized […]

A health insurance plan with wellness features

Ithaca, NY, USA: Cornell University (doctoral dissertation). Cornell University, Ithaca, NY, USA Employers are increasingly using wellness programs to improve health and lifestyle of employees. […]

Medi-Cal and managed care: risk, costs, and regional variation

Sacramento, CA, USA: Public Policy Institute of California. Rollins School of Public Health, Emory University, Atlanta, GA; School of Public Health, University of Alabama at […]

Impact of center case volume on cardiotoxicity during adjuvant trastuzumab in breast cancer

2013 American Society of Clinical Oncology Annual Meeting. Abstract 6625. J Clin Oncol 31 (suppl; abstr 6625). University of Toronto, Toronto, ON, Canada; St. Michael’s […]

Mesurer la morbidite chez les patients diabetiques a Montreal.

Montreal, QC, Canada: Montreal Health and Social Services Agency. Published in French. Montreal Health and Social Services Agency, Montreal, QC, Canada No abstract

The actual versus expected health care use among Healthy Kids enrollees

Gainesville, FL, USA: Institute for Child Health Policy, University of Florida. Institute for Child Health Policy, University of Florida, Gainesville, FL, USA As part of […]

Ambulatory case-mix methodologies: applications to primary care research

In: Grady M, eds. Primary care research: theory and methods. Washington, DC: USDHHS. AHCPR Pub 91-0011:75-81. Johns Hopkins University, Baltimore, MD, USA This paper describes […]

Differences in case mix between CHC users and non users: Washington and Missouri

MDS Associates, Laguna Research Associates. Final report to the Bureau of Primary Health Care. Wheaton, MD, USA: MDS Associates. Wheaton, MD, USA; San Francisco, CA, […]

A comparative analysis of claims-based methods of health risk assessment for commercial populations

Minneapolis, MN, USA: Milliman USA and Park Nicollet Institute Health Research Center. Milliman USA and Park Nicollet Institute Health Research Center, Minneapolis, MN, USA The […]

Effect of patient cost sharing in South Korea: ACG risk-adjusted differences in health care utilization and expenditures among National Health Insurance and Medical Aid enrollees, 2004-2005

Baltimore, MD, USA: Johns Hopkins University (doctoral dissertation). Johns Hopkins University, Baltimore, MD, USA Korea has experienced a period of rapid economic development and industrialization […]

Provider profiling: implementation issues within Florida MediPass

Gainesville, FL, USA: University of Florida. University of Florida, Gainesville, FL, USA Provider profiling use epidemiological methods to compare physician practice  patterns across various dimensions […]

Using the ACG casemix system in population health management programs at Johns Hopkins

BMC Health Serv Res 9:A16. Johns Hopkins HealthCare, Glen Burnie, MD, USA   Introduction: Johns Hopkins HealthCare contracts with the US Department  of Defense (DOD) […]

Who uses exenatide for glucose control in diabetes mellitus?

A retrospective cohort study of a new therapy? Rockville, MD, USA: Agency for Healthcare Research and Quality. Johns Hopkins University, Baltimore, MD, USA BACKGROUND: Exenatide […]