Update Your ProfileAcademic Title:
Associate Professor
Primary Appointment:
Medicine
Secondary Appointment(s):
Epidemiology & Public Health
Administrative Title:
Director, Precision Medicine and Population Health Program for the University of Maryland Institute for Health Computing (UM-IHC)
Additional Title:
Associate Division Chief for Clinical Research, Division of Endocrinology, Diabetes, and Nutrition
Location:
Baltimore, MD
Phone (Primary):
410-706-7167
Education and Training
2000-2004 B.A., Biochemical Sciences, Harvard University (Summa Cum Laude) with language citation in Modern Hebrew
2004-2009 M.D., Johns Hopkins University School of Medicine
2009-2010 Internship, Mayo Clinic, Rochester, MN
2010-2012 Residency, Internal Medicine, Mayo Clinic, Rochester, MN
2012-2015 Fellowship, Endocrinology, Diabetes, and Metabolism, Mayo Clinic, Rochester, MN
2013-2015 M.S., Mayo Clinic Graduate School of Biomedical Sciences, clinical and translational science
Biosketch
Dr. Rozalina McCoy is Associate Professor and Associate Division Chief for Clinical Research in the Division of Endocrinology, Diabetes, and Nutrition, Department of Medicine; the Director of the Precision Medicine and Population Health in the University of Maryland Institute for Health Computing (UM-IHC); the Director of Research in the University of Maryland School of Medicine Rural-MD Program; and the co-Director of the Center for Seniors Uniting Nationwide to Support Health, INtegrated care, and Economics (SUNSHINE), a NIA-funded P30 Center for the Demography and Economics of Aging.
Dr. McCoy is a practicing endocrinologist, clinician educator, and physician scientist who - through clinical care, research, education, and advocacy - is dedicated to improving the quality, accessibility, and sustainability of diabetes care. She is particularly interested in understanding and addressing the multi-level factors that lead to suboptimal care and poor health with the goal of developing precision medicine tools and patient-centered care delivery models that improve health and wellbeing, while supporting the sustainability of the healthcare system. Dr. McCoy’s methodologic expertise is in the use of real-world data, including administrative claims and electronic health record data, for causal inference, health economics and outcomes, pharmacoepidemiologic, and population health research. Her work is supported by the National Institutes of Health, the Patient-Centered Outcomes Research Institute, and the American Diabetes Association.
Dr. McCoy has published >290 peer-reviewed articles and has contributed to the development and dissemination of clinical guidelines and consensus statements on the management of diabetes, cardiovascular disease, and chronic kidney disease for the American Diabetes Association (ADA) and the American Heart Association (AHA). She serves as co-chair of the American Diabetes Association (ADA) Professional Practice Committee and sits on the ADA Science & Health Care Executive Council.
Dr. McCoy is passionate about caring for patients and serving her community, training the next generation of clinicians and applied researchers, and driving practice transformation to achieve better health outcomes with greater efficiency and lower cost. During her time at Mayo Clinic (2015-2023), she led multiple efforts to improve care delivery through team-based primary care and community paramedicine. Dr. McCoy joined the University of Maryland family in 2023 and is excited to work with faculty, students, and staff across the University of Maryland Baltimore, University of Maryland College Park (where she has an adjunct faculty position in the Department of Health Policy and Management of the University of Maryland School of Public Health), the University of Maryland Medical System (UMMS), and communities across Maryland to improve health through research, practice transformation, service, and education.
Research/Clinical Keywords
Type 1 diabetes, type 2 diabetes, obesity, comparative effectiveness and safety, patient-centered outcomes research, cardio-kidney-metabolic complications, target trial emulation, causal inference, healthy aging, multi-morbidity, community paramedicine/mobile integrated health, cost of care, population health, health policy, shared decision making
Highlighted Publications
Understanding, Predicting, and Preventing Diabetes Complications
McCoy RG, Van Houten HK, Ziegenfuss JY, Shah ND, Wermers RA, Smith SA. Increased mortality of patients with diabetes reporting severe hypoglycemia. Diabetes Care. 2012 Sep; 35 (9):1897-901
McCoy RG, Van Houten HK, Ross JS, Montori VM, Shah ND. HbA1c overtesting and overtreatment among US adults with controlled type 2 diabetes, 2001-13: observational population based study. BMJ. 2015 Dec 8; 351:h6138
McCoy RG, Lipska KJ, Yao X, Ross JS, Montori VM, Shah ND. Intensive Treatment and Severe Hypoglycemia Among Adults With Type 2 Diabetes. JAMA Intern Med. 2016 Jul 1; 176 (7):969-78
McCoy RG, Ngufor C, Van Houten HK, Caffo B, Shah ND. Trajectories of Glycemic Change in a National Cohort of Adults With Previously Controlled Type 2 Diabetes. Med Care. 2017 Nov; 55 (11):956-964
Silbert R, Salcido-Montenegro A, Rodriguez-Gutierrez R, Katabi A, McCoy RG. Hypoglycemia Among Patients with Type 2 Diabetes: Epidemiology, Risk Factors, and Prevention Strategies. Curr Diab Rep. 2018 Jun 21; 18 (8):53
Rodriguez-Gutierrez R, Gonzalez-Gonzalez JG, Zuniga-Hernandez JA, McCoy RG. Benefits and harms of intensive glycemic control in patients with type 2 diabetes. BMJ. 2019 Nov 5; 367:l5887
McCoy RG, Lipska KJ, Van Houten HK, Shah ND. Association of Cumulative Multimorbidity, Glycemic Control, and Medication Use With Hypoglycemia-Related Emergency Department Visits and Hospitalizations Among Adults With Diabetes. JAMA Netw Open. 2020 Jan 3; 3 (1):e1919099
McCoy RG, Galindo RJ, Swarna KS, Van Houten HK, O'Connor PJ, Umpierrez GE, Shah ND. Sociodemographic, Clinical, and Treatment-Related Factors Associated With Hyperglycemic Crises Among Adults With Type 1 or Type 2 Diabetes in the US From 2014 to 2020. JAMA Netw Open. 2021 Sep 1; 4 (9):e2123471
Myers LA, Swanson KM, Glasgow AE, McCoy RG. Management and Outcomes of Severe Hypoglycemia Treated by Emergency Medical Services in the U.S. Upper Midwest. Diabetes Care. 2022 Aug 1; 45 (8):1788-1798
McCoy RG, Herrin J, Galindo RJ, Swarna KS, Umpierrez GE, Golden SH, O'Connor PJ. Rates of Hypoglycemic and Hyperglycemic Emergencies Among U.S. Adults With Diabetes, 2011-2020. Diabetes Care. 2023 Feb 1;46(2):e69-e71
Pharmacoepidemiology and Comparative Effectiveness/Safety
Allen AM, Van Houten HK, Sangaralingham LR, Talwalkar JA, McCoy RG. Healthcare Cost and Utilization in Nonalcoholic Fatty Liver Disease: Real-World Data From a Large U.S. Claims Database. Hepatology. 2018 Dec; 68 (6):2230-2238
Fan J, Jeffery MM, Hooten WM, Shah ND, McCoy RG. Trends in Pain Medication Initiation Among Patients With Newly Diagnosed Diabetic Peripheral Neuropathy, 2014-2018. JAMA Netw Open. 2021 Jan 4; 4 (1):e2035632
McCoy RG, Van Houten HK, Deng Y, Mandic PK, Ross JS, Montori VM, Shah ND. Comparison of Diabetes Medications Used by Adults With Commercial Insurance vs Medicare Advantage, 2016 to 2019. JAMA Netw Open. 2021 Feb 1; 4 (2):e2035792
McCoy RG, Van Houten HK, Karaca-Mandic P, Ross JS, Montori VM, Shah ND. Second-Line Therapy for Type 2 Diabetes Management: The Treatment/Benefit Paradox of Cardiovascular and Kidney Comorbidities. Diabetes Care. 2021 Aug 4; 44(10):2302-2311
Deng Y, Polley EC, Wallach JD, Dhruva SS, Herrin J, Quinto K, Gandotra C, Crown W, Noseworthy P, Yao X, Lyon TD, Shah ND, Ross JS, McCoy RG. Emulating the GRADE trial using real world data: retrospective comparative effectiveness study. BMJ. 2022 Oct 3; 379:e070717
Herges JR, Galindo RJ, Neumiller JJ, Heien HC, Umpierrez GE, McCoy RG. Glucagon Prescribing and Costs Among U.S. Adults With Diabetes, 2011-2021. Diabetes Care. 2023 Mar 1; 46 (3):620-627
Deng Y, Polley EC, Wallach JD, Herrin J, Ross JS, McCoy RG. Comparative effectiveness of second line glucose lowering drug treatments using real world data: emulation of a target trial. BMJ Med. 2023 Aug 9;2(1):e000419
McCoy RG, Herrin J, Swarna KS, Deng Y, Kent D, Ross JS, Umpierrez G, Galindo RJ, Crown W, Borah B, Montori, VM, Brito Campana JP, Neumiller JJ, Mickelson M, Polley EC. Effectiveness of Glucose-Lowering Medications on Cardiovascular Outcomes in Patients with Type 2 Diabetes at Moderate Cardiovascular Risk. Nature Cardiovascular Research. 2024;3(4):431-440
Barkmeier AJ, Herrin J, Swarna KS, Deng Y, Polley EC, Umpierrez GE, Gallindo RJ, Ross JS, Mickelson MM, McCoy RG. Comparative Effectiveness of GLP-1 Receptor Agonists, SGLT2 Inhibitors, DPP-4 Inhibitors, and Sulfonylureas for Sight-Threatening Diabetic Retinopathy. Ophthalmol Retina. 2024:S2468-6530(24)00229-X
Neumiller JJ, Herrin J, Swarna KS, Polley EC, Galindo RJ, Umpierrez GE, Deng Y, Ross JS, Mickelson MM, McCoy RG. Kidney Outcomes with Glucagon-Like Peptide-1 Receptor Agonists, Sodium-Glucose Cotransporter 2 Inhibitors, Dipeptidyl Peptidase-4 Inhibitors, and Sulfonylureas in Type 2 Diabetes and Moderate Cardiovascular Risk. Clin J Am Soc Nephrol. 2024;20(2):206-17
Brito JP, Herrin J, Swarna KS, Singh Ospina NM, Montori VM, Toro-Tobon D, Umpierrez GE, Galindo RJ, Deng Y, Mickelson MM, Shao H, Polley EC, McCoy RG. GLP-1RA Use and Thyroid Cancer Risk. JAMA Otolaryngol Head Neck Surg. 2025 Jan 23;
Deng Y, Polley EC, Herrin J, Swarna KS, Kent DM, Ross JS, Maron BA, Mickelson MM, McCoy RG. Heterogeneity of Cardiovascular Effects of Second-Line Glucose-Lowering Therapies in Adults With Type 2 Diabetes Across the Range of Moderate Baseline Cardiovascular Risk. J Am Heart Assoc. 2025 Jul 17;:e040217
Innovative Care Delivery Models to Improve Population Health
Stickler ZR, Carlson PN, Myers L, Schultz JR, Swenson T, Darling C, Liedl C, McCoy RG. Community Paramedic Mobile COVID-19 Unit Serving People Experiencing Homelessness. Ann Fam Med. 2021 Nov-Dec; 19 (6):562
Herges JR, Matulis JC 3rd, Kessler ME, Ruehmann LL, Mara KC, McCoy RG. Evaluation of an Enhanced Primary Care Team Model to Improve Diabetes Care. Ann Fam Med. 2022 Nov-Dec;20(6):505-511
Ridgeway JL, Wissler Gerdes EO, Zhu X, Finnie DM, Wiepert LM, Glasgow AE, Torres AJ, Smith OA, Juntunen MB, Liedl CP, McCoy RG. A Community Paramedic Clinic at a Day Center for Adults Experiencing Homelessness. NEJM Catalyst Innovations in Care Delivery 2023; 04(4)
Ducharme-Smith A, Juntunen M, Espinoza A, Liedl C, Fischer K, Meilander A, Quillen J, McCoy RG. Pilot Pragmatic Trial of a Community Paramedic Diabetes Self-Management Education Program for Adults With Diabetes. Diabetes Care. 2025 Oct 7:dc251580
Social Determinants of Diabetes-Related Health Outcomes
Kurani SS, Lampman MA, Funni SA, Giblon RE, Inselman JW, Shah ND, Allen S, Rushlow D, McCoy RG. Association Between Area-Level Socioeconomic Deprivation and Diabetes Care Quality in US Primary Care Practices. JAMA Netw Open. 2021 Dec 1; 4 (12):e2138438
Kurani SS, Heien HC, Sangaralingham LR, Inselman JW, Shah ND, Golden SH, McCoy RG. Association of Area-Level Socioeconomic Deprivation With Hypoglycemic and Hyperglycemic Crises in US Adults With Diabetes. JAMA Netw Open. 2022 Jan 4; 5 (1):e2143597
Jiang DH, Herrin J, Van Houten HK, McCoy RG. Evaluation of High-Deductible Health Plans and Acute Glycemic Complications Among Adults With Diabetes. JAMA Netw Open. 2023 Jan 3;6(1):e2250602
McCoy RG, Swarna KS, Jiang DH, Van Houten HK, Chen J, Davis EM, Herrin J. Enrollment in High Deductible Health Plans and Incident Diabetes Complications. JAMA Network Open. 2024; 7(3):e243394
Steiger K, Herrin J, Swarna KS, Davis EM, McCoy RG. Disparities in Acute and Chronic Complications of Diabetes Along the U.S. Rural-Urban Continuum. Diabetes Care. 2024;47(5):818-825
Machine Learning and Artificial Intelligence in Health Care
Ngufor C, Van Houten H, Caffo BS, Shah ND, McCoy RG. Mixed effect machine learning: A framework for predicting longitudinal change in hemoglobin A1c. J Biomed Inform. 2019 Jan; 89:56-67
Yao X, Rushlow DR, Inselman JW, McCoy RG, Thacher TD, Behnken EM, Bernard ME, Rosas SL, Akfaly A, Misra A, Molling PE, Krien JS, Foss RM, Barry BA, Siontis KC, Kapa S, Pellikka PA, Lopez-Jimenez F, Attia ZI, Shah ND, Friedman PA, Noseworthy PA. Artificial intelligence-enabled electrocardiograms for identification of patients with low ejection fraction: a pragmatic, randomized clinical trial. Nat Med. 2021 May; 27 (5):815-819
Additional Publication Citations
Research Interests
I am an endocrinologist, internist, and health services researcher with a passion for improving the quality, accessibility, and sustainability of medical care for people living with diabetes and other chronic conditions, particularly those with clinical complexity. Broadly, my work relies on using real-world data (e.g., claims, electronic health records [EHR], social media) and a wide range of observational (e.g., epidemiologic, causal inference, econometric, geospatial), artificial intelligence/machine learning (AI/ML), interventional (e.g., pragmatic trials), and mixed methods designs to 1) characterize, identify, and predict high-risk subgroups; 2) identify treatment strategies that optimize health outcomes with least burden of treatment, harm, and cost; 3) operationalize sustainable delivery of high-quality person-centered care in clinical and community settings; and 4) facilitate patient/stakeholder engagement in research.
My recent work has focused on 1) epidemiology and prediction of acute and chronic diabetes complications; 2) impacts of social determinants of health on care delivery, quality, and outcomes; 3) emulating comparative effectiveness trials of diabetes, obesity, and osteoporosis therapies; 4) primary care, organizational, and payment models associated with optimal diabetes care and outcomes; and 5) design, implementation, and evaluation of novel care models for high-risk patients, such as mobile integrated health, comprehensive and team-based primary care, and transitional care programs.
Awards and Affiliations
AWARDS
John Harvard Scholarship for Academic Excellence, Harvard University (2002, 2003, 2004)
Phi Beta Kappa, Harvard University, awarded for academic excellence (2003)
Christensen Prize for Outstanding Research, Department of Chemistry, Harvard University, awarded for research excellence (2003)
Thomas T. Hoopes Prize, Harvard University, Awarded to 74 undergraduate students upon the defense of their senior theses in recognition of outstanding scholarly work or research (2004)
Lawrence J. Henderson Prize, Best Senior Thesis in Biochemical Sciences, Department of Biochemical Sciences, Harvard University (2004)
Franklin Paine Mall Award, Johns Hopkins University School of Medicine, awarded for academic excellence as the top ranking medical student in the first year class (2005)
Henry Strong Denison Award, Medical Research, Johns Hopkins University School of Medicine, awarded for excellence in research (2007)
Outstanding Research Award, American College of Physicians (2007)
Fellows Outstanding Research Award, National Heart Lung and Blood Institute, NIH (2007)
American Medical Association Physician of Tomorrow Scholarship (2008)
Alpha Omega Alpha, Johns Hopkins University School of Medicine (2009)
Edward C. Rosenow Endowed Professorship Internal Medicine Residency Research Award, Mayo Clinic, awarded for excellence in research (2011)
General Mills Foundation Clinician-Investigator Fellowship (2012)
Delivery System Science Fellowship, AcademyHealth (2013)
Health Care Delivery Scholar, Robert D and Patricia E Kern Center for the Science of Health Care Delivery, Mayo Clinic (2015-2019)
Top Performing Provider Award in Patient Experience, Mayo Clinic, awarded for being in the top 1% of all clinicians across Mayo Clinic for patient experience (awarded for the 2020 and 2022 practice years)
Mayo Clinic Medical Transport Excellence in EMS Award, awarded by nomination from front-line Mayo Clinic Ambulance team members for commitment to the highest standards in patient care, quality, efficiency, and safety (2021)
American Diabetes Association (ADA) Interest Group Abstract Award in the category of Health Care Delivery & Quality Improvement (2022)
Minnesota Rural Health Hero Award, awarded by the Minnesota Department of Health for pioneering community paramedicine as a care delivery model to care for people experiencing homelessness, rural populations with diabetes, and other underserved populations (2022)
Rochester Mayor’s Medal of Honor Human Services Award, awarded for service to the community, establishing a clinic for people experiencing homelessness, and delivering medical care to vulnerable members of the Rochester, MN community (2022)
Chabad on Call Healthcare Hero Award, awarded by the national Chabad on Call organization upon nomination by Chabad Lubavitch of Southern Minnesota for service to the local community (2022)
E. Drewry Henderson Award, Zumbro Valley Medical Society, awarded in recognition of caring for people experiencing homelessness and leadership of the Mayo Clinic Ambulance Community Paramedic Service (2023)
Award for Research Data Stewardship shared with OptumLabs for work predicting the risk of severe hypoglycemic and hyperglycemic events in adults with diabetes. Future of Privacy Forum (2023)
Chairman’s Special Achievement Faculty Award, Department of Medicine, University of Maryland School of Medicine (2024)
Faculty Teacher of the Year Award, Division of Endocrinology, Diabetes, & Nutrition, University of Maryland School of Medicine (2024)
Faculty Research Mentor of the Year Award, Division of Endocrinology, Diabetes, & Nutrition, University of Maryland School of Medicine (2024)
American Society for Clinical Investigation, elected member (2024)
AFFILIATIONS
2006-2007 HHMI-NIH Research Scholar, National Heart Lung and Blood Institute, Bethesda, MD
2015-2019 Senior Associate Consultant, Division of Community Internal Medicine, Geriatrics and Palliative Care, Department of Internal Medicine, Mayo Clinic, Rochester, MN. Joint Appointment in the Division of Health Care Policy & Research, Department of Health Sciences Research. Joint Appointment in the Section of Geriatric Medicine and Gerontology, Department of Internal Medicine
2019-2023 Consultant, Division of Community Internal Medicine, Geriatrics and Palliative Care, Department of Internal Medicine, Mayo Clinic, Rochester, MN. Joint Appointment in the Division of Health Care Delivery Research, Department of Quantitative Health Sciences
2020−2023 Medical Director, Mayo Clinic Ambulance Community Paramedic Service, Rochester, MN
2023-present Supplemental (Adjunct) Research Faculty, Division of Community Internal Medicine, Geriatrics and Palliative Care, Department of Internal Medicine, Mayo Clinic, Rochester, MN
2023-present Associate Division Chief for Clinical Research, Division of Endocrinology, Diabetes, and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD
2023-present Director, Precision Medicine and Population Health, University of Maryland Institute for Health Computing, Bethesda, MD
2023−present Adjunct Associate Professor, Department of Health Policy and Management, University of Maryland School of Public Health, College Park, MD
Grants and Contracts
P30 AG 097158
Chen/McCoy/Thomas (MPI)
09/01/2025 – 08/31/2031
Center for Seniors Uniting Nationwide to Support Health, INtegrated care, and Economics (SUNSHINE)
R01 HL 172948
Brito (PI); Role: site-PI
03/01/2025-2/28/2029
Understanding and addressing the lack of and delayed screening for primary Aldosteronism
DOD PR241441
Martinez (PI); Role: site-PI
01/01/2025-12/31/2029
Metformin to Attenuate ProgressiVe RespIratory Decline in Idiopathic Pulmonary Fibrosis (MAVRIC-IPF)
R01 DK 141666
Lipska/McCoy (MPI)
01/01/2025 – 12/31/2028
Insulin Affordability: Unpacking the Impact of the Inflation Reduction Act on Diabetes Outcomes in Medicare
R01 DK 135515
Arterburn/McCoy (MPI)
03/06/2024 – 02/29/2028
Comparative Effectiveness and Safety of Metabolic/Bariatric Surgery, GLP-1, and SGLT-2 Medications for Patients with Obesity and Type 2 Diabetes
R01 AG 79113
Brito/McCoy (MPI)
09/15/2022-06/30/2027
Comparative Effectiveness and Safety of Osteoporosis Drug Therapies
DB-2020C2-20306
McCoy (PI)
09/01/2021-11/30/2026
Second-Line Therapies for Patients with Type 2 Diabetes and Moderate Cardiovascular Disease Risk
American Diabetes Association
McCoy (PI)
11/15/2022-11/14/2025
Improving Disparities in Diabetes Management and Outcomes: Implementation of Comprehensive Primary Care
R01 AG 089377
Chen (PI); Role: co-Investigator
08/15/2024 – 04/30/2029
Developing a Novel Analytical Toolbox to Tackle Multifaceted Statistical Challenges in Analyzing Medicare-linked data for Older Adults living with ADRD
R37 CA 272473
Brito (PI); Role: site-PI
07/01/2022-06/30/2027
De-implementation of inappropriate thyroid ultrasound
In the News
Professional Activity
Associate Editor, BMJ Open Diabetes Research and Practice (2025-present)
ADA Professional Practice Committee, member (2024 ADA Standards of Care) and co-chair (2025 and 2026 ADA Standards of Care)
ADA Science & Health Care Executive Council (2025-present)
ADA Scientific Sessions and Clinical Updates Conference Planning Committees
Editorial Board member, BMJ Medicine
Editorial Board member, JCI and JCI: Insight
ADA Primary Care Advisory Group, member of the leadership team
Member, OptumLabs® Partner Research for Equitable System Transformation After COVID-19 (PRESTAC) Health Equity Collaborative
MDH Minnesota Cardiovascular Health and Diabetes State Plan 2030, work-group member
ADA Diabetes in Primary Care Interest Group leadership team, Advisor (2018-2020), Chair-Elect (2020-2022), Chair (2022-2024), Immediate Past Chair (2024-2026)
AcademyHealth Quality and Value Interest Group, Advisory Committee member-at-large (2016-2019), Chair (2019-2020), Immediate-past Chair (2020-2021)