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Leonard Samuel Feldman, MD

Director, Medicine-Pediatrics Urban Health Residency Program
Associate Professor of Medicine

See Research on Pubmed

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Main Location

The Johns Hopkins Hospital

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Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

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Call +1-410-502-0773 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Director, Medicine-Pediatrics Urban Health Residency Program
  • Director, Osler Medical Residency Urban Health Track
  • Associate Program Director, Osler Medical Residency Program
  • Director, General Medicine Consult Service
  • Associate Professor of Medicine
  • Assistant Professor of Pediatrics


Hospitalist, Internal Medicine

Research Interests

Education; Quality Improvement; Residency Training; EBM


Dr. Feldman graduated with a B.A. in Political Science from Brown University and then received his medical degree from the University of Maryland School of Medicine. Dr. Feldman completed his internship and residency in Internal Medicine and Pediatrics at the University of North Carolina. Lenny served as chief resident for Internal Medicine at UNC, which allowed him to teach and attend with medical students and residents extensively.

Dr. Feldman is Board-certified in Internal Medicine and Pediatrics. He holds active memberships in the American College of Physicians-American Board of Internal Medicine, the American Academy of Pediatrics, the Society of General Internal Medicine, and the Society of Hospital Medicine.

He is the founder and program director of the Johns Hopkins Combined Internal Medicine-Pediatrics Urban Health Residency and the Osler Internal Medicine Urban Health Primary Care Track. He is also an associate program director for the Osler Internal Medicine Residency and the Director of the General Medicine Comprehensive Consultation Service.

As a program builder and a specialist in resident and hospitalist education, Dr. Feldman has focused his research on consult medicine, resident education, on-line education, and high-value care. Other interests include patient education, urban medicine, evidence-based medicine, and quality improvement. He is the editor-in-chief for SHM Consultative and Perioperative Medicine Essentials for Hospitalists and an Associate Editor for the Journal of Hospital Medicine.


  • English


Association of Chiefs of General Internal Medicine

Society of General Internal Medicine

Society of Hospital Medicine

Association of Program Directors of Internal Medicine

American College of Physician

American Academy of Pediatrics, Fellow elected 2003

Additional Resources

Additional Resources +
  • Education +


    • University of Maryland School of Medicine (Baltimore MD) (1999)


    • University of North Carolina / Internal Medicine (Chapel Hill NC) (2004)
    • University of North Carolina / Medicine and Pediatrics (Chapel Hill NC) (2003)


    • American Board of Pediatrics / Pediatrics (2003)
    • American Board of Internal Medicine / Internal Medicine (2003)
  • Research & Publications +

    Selected Publications View all on PubMed

    1. Feldman LS, Brotman DJ. When can patients with acute deep vein thrombosis be allowed to get up and walk? Cleve Clin J Med. Oct 2006;73(10):893-894, 896.
    2. Boonyasai RT, Windish DM, Chakraborti C, Feldman LS, Rubin HR, Bass EB. Effectiveness of teaching quality improvement to clinicians: a systematic review. Jama. Sep 5 2007;298(9):1023-1037.
    3. Bolen S, Feldman L, Vassy J, et al. Systematic Review: Comparative Effectiveness and Safety of Oral Medications for Type 2 Diabetes Mellitus. Ann Intern Med. Jul 16 2007.
    4. Feldman LS, Brotman DJ. Perioperative statins: more than lipid-lowering? Cleve Clin J Med. Sep 2008;75(9):654-662.
    5. Qayyum R, Bolen S, Maruthur N, Feldman L, Wilson LM, Marinopoulos SS, Ranasinghe P, Amer M, Bass EB. Systematic review: comparative effectiveness and safety of premixed insulin analogues in type 2 diabetes. Ann Intern Med. Oct 21 2008;149(8):549-559.
    6. Selvin E, Bolen S, Yeh HC, Wiley C, Wilson LM, Marinopoulos SS, Feldman L, Vassy J, Wilson R, Bass E, Brancati F. Cardiovascular outcomes in trials of oral diabetes medications: a systematic review. Archives of internal medicine. Oct 27 2008;168(19):2070-2080.
    7. Stewart R, Feldman L, Weisfeldt M. Addressing the primary care deficit: building primary care leaders for tomorrow. Journal of graduate medical education. Jun 2010;2(2):294-296.
    8. Brown VT, LeBlanc YC, Efird LE, Nesbit T, Wellman JC, Feldman L. Assessing health literacy to identify patients for pharmacist-provided counseling on high-risk medications. Am J Health Syst Pharm. Sep 15 2011;68(18):1692-1693.
    9. Feldman LS, Costa LL, Feroli ER, Jr., et al. Nurse-pharmacist collaboration on medication reconciliation prevents potential harm. Journal of hospital medicine (Online). May-Jun 2012;7(5):396-401.
    10. Neufeld KJ, Alvanzo A, King VL, Feldman L, Hsu JH, Rastegar DA, Colbert JM, MacKinnon DF. A collaborative approach to teaching medical students how to screen, intervene, and treat substance use disorders. Substance abuse : official publication of the Association for Medical Education and Research in Substance Abuse. Jul 2012;33(3):286-291.
    11. Stewart R, Feldman L, Bitzel D, Gibbons MC, McGuire M. Urban health and primary care at Johns Hopkins: urban primary care medical home resident training programs. Journal of health care for the poor and underserved. Aug 2012;23(3 Suppl):103-113.
    12. Durand DJ, Feldman LS, Lewin JS, Brotman DJ. Provider cost transparency alone has no impact on inpatient imaging utilization. Journal of the American College of Radiology: JACR. Feb 2013;10(2):108-113.
    13. Feldman LS, Shihab HM, Thiemann D, Yeh HC, Ardolino M, Mandell S, Brotman DJ. Impact of Providing Fee Data on Laboratory Test Ordering: A Controlled Clinical Trial. JAMA Internal Medicine. 2013 Apr 15:1-6.
    14. Desai S, Feldman LS, Brown L, Dezube R, Yeh HC, Punjabi N, Afshar K, Grunwald MR, Harrington C, Naik R, Cofrancesco J. Effect of a 2011- versus 2003- duty hour regulation compliant model on sleep duration, trainee education, and continuity of patient care among internal medicine house staff: A randomized trial. JAMA Internal Medicine. 2013 Apr 22;173(8):649-55.
    15. Block L, Habicht R, Wu AW, Desai SV, Wang K, Silva KN, Niessen T, Oliver N, Feldman L. In the Wake of the 2003 and 2011 Duty Hours Regulations, How Do Internal Medicine Interns Spend Their Time? Journal of General Internal Medicine. Aug 2013;28(8):1042-1047.
    16. Pahwa A, Arbab-Zadeh A, Brotman D, Feldman LS. Potential Role of Coronary CT-Angiography for Guiding Perioperative Cardiac Management for Noncardiac Surgery? Heart International. 2013;8(1):e1.
    17. L Block, AW Wu, L Feldman, HC Yeh, SV Desai. Residency schedule, burnout and patient care among first-year residents. Postgraduate medical journal. Sep 2013;89(1055):495-500.
    18. Block L, Habicht R, Oluyadi FO, Wu AW, Desai SV, Silva KN, Niessen T, Oliver N, Feldman L. Variability in hand hygiene practices among internal medicine interns. American Journal of Infection Control. Forthcoming 2013.
    19. Block L, Hutzler L, Habicht R, Wu AW, Desai SV, Silva KN, Niessen T, Oliver N, Feldman L. Do internal medicine interns practice etiquette‐based communication? A critical look at the inpatient encounter. Journal of hospital medicine (Online). Oct 12 2013.
    20. H Aboumatar, RD Allison, L Feldman, K Woods, P Thomas, C Wiener. Focus on Transitions of Care Description and Evaluation of an Educational Intervention for Internal Medicine Residents. American Journal of Medical Quality 2013 Nov 1. [Epub ahead of print] PMID: 2418598
    21. Block L., Jarlenski M., Wu A., Feldman L., Conigliaro J., Swann J., Desai S. Inpatient Safety Outcomes Following the 2011 Residency Work-Hour Reform. Journal of hospital medicine (Online). 2014.

    22. Block L, Habicht R, Wu AW, Desai SV, Wang K, Silva KN, Niessen T, Oliver N, Feldman L. A post-2011 time motion study--the authors' reply. J Gen Intern Med, 2014. 29(1): p. 24.

    23. Desai SV, Feldman L, Cofrancesco J. The "new normal"-reply. JAMA internal medicine. Oct 28 2013;173(19):1845-1846.

  • Academic Affiliations & Courses +
  • Activities & Honors +


    2006 Randol Barker Award from the General Internal Medicine Fellows

    2009 Society of Hospital Medicine Annual Meeting Innovations Poster Winner

    2012 Osler residency Appreciation Award- Presented with an Osler tie

    2012 Nominated for a 2012 SOURCE Community Service Award, faculty mentor category

    2012 Hooder for the 2012 JHSOM graduation ceremony, One of Two Selected by the Class of 2012

    2013 APDIM Award of Excellence for Research Abstract

    2013 MPPDA Member Spotlight for the month of December of 2013

    2014 Outstanding Hospitalist Physician Award, Maryland ACP Chapter

    Professional Activities


  • Videos & Media +

    Lectures and Presentations

    Local CME Instruction 

    Harbor Hospital Evidence-Based Medicine Lecture Series, 4 lectures each academic year. 2008-11

    Tumulty Topics in Internal Medicine, Meet the Professor, 2009

    Good Samaritan Hospital Lecture Series, Pre-op Assessment and Risk Reduction, 2009

    Tumulty Topics in Internal Medicine. Meet the Professor, 2010

     Current Clinical Issues in Primary Care at Pri-Med Mid-Atlantic Conference & Exhibition, Optimized, Not Cleared, 2011

     Tumulty Topics in Internal Medicine, Meet the Professor, 2011

     Maryland Chapter of the Society of Hospital Medicine, Non-Evidence Based Medicine: Things we do for no reason, 2012

     Tumulty Topics in Internal Medicine, Perioperative Controversies and Meet the Professor, 2012

    CME Course Director

    Understanding Evidence-Based Medicine, An Approach to Managing Patients with Dyslipidemia, CME Sponsor: JHSOM, 2004-05

    Evidence-Based Medicine: Lipid Lowering Therapy Tele-webcast, CME Sponsor: Johns Hopkins SOM, 2005-06

    Consultative & Perioperative Medicine Essentials for Hospitalists, On-Line Series;, Editor-In-Chief and Creator, CME Sponsor: Johns Hopkins SOM, 2007-11

    Optimizing Diagnosis and Management of Hyponatremiain the Hospitalized Patient, 2010

    Perioperative Crossfire Series, Co-Moderator with Daniel Brotman, QuantiaMD, on-line, 2010

    Improving Outcomes for Hospitalized Patients: The Essential Role of the Hospitalist, 2010

    Consultative & Perioperative Medicine Essentials for Hospitalists, On-Line Series;, Editor-In-Chief and Creator, CME Sponsor: Wiley, 2011-

    Primary Care Physician Forum on Sickle Cell Disease (Primary Care for SCD), Moderator and co-creator, 2012

    Primary Care Physician Forum on Sickle Cell Disease (SCD Chronic Pain), Moderator and co-creator, 2012

    Hospital Medicine 2014 CME at Sea, Updates in Hospital Medicine, 2014               

    SHM Perioperative Medicine Pre-course- Hospital Medicine 2014, Co-Leader, Las Vegas, NV, 2014

    National Workshops

    Association of Program Directors of Internal Medicine Chief Residents Meeting, SOS: The Sign-Out Success Workshop, 2009

    Association of Program Directors of Internal Medicine Chief Residents Meeting, SOS: The Sign-Out Success Workshop, 2010

    Society of Hospital Medicine: Perioperative Medicine Pre-course, The Role of the Consultant, 2012

    Association of Program Directors of Internal Medicine, What Are Your Interns Doing with Their Time? 2013

  • Events +

    Grand Rounds Lectures

    Feldman L.S. When can patients with acute deep vein thrombosis be allowed to get up and walk? Greater Baltimore Medical Center Grand Rounds, 2006

    Feldman L.S. Statins: Lowering LDL and Perioperative Risk? Greater Baltimore Medical Center Grand Rounds, 2008

    Feldman L.S. Perioperative Cardiac Risk Management Greater Baltimore Medical Center Grand Rounds, 2009


  • Contact & Locations +


    The Johns Hopkins Hospital
    600 N. Wolfe Street
    Baltimore, MD 21287
    Phone: 443-287-3135
    Appointment Phone: 410-502-2128
    Fax: 410-502-0923
    Location Map


    • Pediatrics
    • Medicine - General Internal Medicine

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