Juan Lessing, MD
Associate Professor, Medicine-Hospital Medicine

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Medical School:
  • MD, University of California, San Francisco, School of Medicine (2011)
Undergraduate School:
  • BA, Princeton University (NJ) (2005)
Internship:
  • University of Washington Program (2012)
Residency:
  • University of Washington Program, Chief Resident, Internal Medicine (2015)
Department: Medicine-Hospital Medicine

Publications

  • Lessing JN, Manning KD. Leadership & Professional Development: Finding and Making the Most of Your "Professional Home". J Hosp Med. 2024 Jan;19(1):51-52. Epub ahead of print 2023 Sep 19. PMID: 37726953.
  • Marshall TL, Limes J, Lessing JN. Clinical Progress Note: Diagnostic Error in Hospital Medicine. J Hosp Med. 2024 Jan; 19(1):53-56. Epub ahead of print 2023 Sep 18. PMID: 37721312.
  • Bryant AD, Pitman SK, Lessing JN. Trust but verify: A case report of unintended medication omission. Clin Case Rep. 2023 Jan;11(1):e6800. PubMed PMID: 36619493
  • Konon EN, Hagan AF, Lessing JN. “The Art of Mastering Oral Case Presentations: A Third Year Medical Student’s Perspective.” in-Training, the online peer-reviewed publication for medical students. Published February 27, 2023. https://in-training.org/the-art-of-mastering-oral-case-presentations-a-third-year-medical-students-perspective-26800 Infographic: http://in-training.org/wp-content/uploads/2023/02/The-Art-of-Mastering-Oral-Case-Presentations.pdf
  • Stella SA, Lessing JN, Saunders M, Fluker SA. Meeting the Promise of Tomorrow at the Intersection of Housing and Health.” SGIM Forum Mar 2023. https://connect.sgim.org/sgimforum/viewdocument/meeting-the-promise-of-tomorrow-at
  • Lessing JN, Wrenn K, Saunders S, Dalie J, Lee-Noonan T, Luciano G. “Lessons Learned from a Virtual and Combined Regional SGIM Meeting: Some Renewed, Some Anew.” SGIM Forum Mar 2023. https://connect.sgim.org/sgimforum/viewdocument/lessons-learned-from-a-virtual-and
  • Bianchina N, Sargsyan Z, Zipse M, Lessing JN. “Key Clinical Question: What are Common Pitfalls in Measuring the QTc interval in Hospitalized Adult Patients?” The Hospitalist August 1, 2023. p16-17. https://www.the-hospitalist.org/wp-content/uploads/2023/07/Hospitalist0823.pdf
  • Lessing JN. In The Literature: “Cellulitis is Frequently Misdiagnosed.” The Hospitalist. December 2023, p6. https://www.the-hospitalist.org/wp-content/uploads/2023/11/Hospitalist1223.pdf
  • David Klimpl, Stacey Staudinger, Marina Mutter, Juan N. Lessing. “Improving Clinical Reasoning for APPs: A Longitudinal Curriculum Based on SIDM Competencies.” Diagnostic Error in Medicine 16th International Conference, Society to Improve Diagnosis in Medicine, Cleveland, OH, October 8-11, 2023.
  • Elizabeth Konon, Anna Hagan, Juan N. Lessing. “The Art of Mastering Oral Case Presentations: A Third Year Medical Student’s Perspective.” University of Colorado Department of Medicine Research Day, Aurora, CO, April 18, 2023.
  • Elizabeth Konon, Anna Hagan, Juan N. Lessing. “The Art of Mastering Oral Case Presentations: A Third Year Medical Student’s Perspective.” University of Colorado Academy of Medical Educators, Education Symposium, Aurora, CO, April 24-26, 2023.
  • David Klimpl, Stacey Staudinger, Marina Mutter, Juan N. Lessing. “Improving Clinical Reasoning for PAs and NPs: A Longitudinal Curriculum Based on SIDM Competencies.” European Conference Diagnostic Error in Medicine, Society to Improve Diagnosis in Medicine, Utrecht, Netherlands, Jul 2-4, 2023.
  • Lessing JN, Pierce RG, Dhaliwal G. The Reply. Am J Med. 2022 Oct;135(10):e405. PubMed PMID: 36180182
  • Lessing JN, Pierce RG, Dhaliwal G. Teaching More About Less: Preparing Clinicians for Practice. Am J Med. 2022 Jun;135(6):673-675. PubMed PMID: 35263635
  • Lessing JN, Mark NM, Pierce RG. How to Get More Juice From Each Squeeze: Maximizing Outputs From Academic Efforts. Acad Med. 2022 Jul 1;97(7):1089. PubMed PMID: 34647924
  • Lessing JN, McGarry K, Schiffman F, Austin M, Hepokoski M, Keniston A, Tammaro D, Finn KM. The State of Morning Report in the Current Healthcare Landscape: a National Survey of Internal Medicine Program Directors. J Gen Intern Med. 2022 May;37(7):1665-1672. PubMed PMID: 34585310
  • Levandowski C, Buehler A, Lessing JN, Hanna H. “Diabetes, Drinking, and Dirt: A Cautionary Tale of Disseminated Nocardiosis. The Diagnostic Error in Medicine 14th Annual International Conference. Diagnosis, vol. 9, no. 2, 2022, pp. 294-386, online eA19. https://doi.org/10.1515/dx-2022-0024.
  • Stein S, Anstett T, Foster L, Lessing JN. “How We Frame Diagnostic Error In Comfort-Focused Settings: A Case of Missed Coccidioides.” The Diagnostic Error in Medicine 14th Annual International Conference. Diagnosis, vol. 9, no. 2, 2022, pp. 294-386, online eA21-2. https://doi.org/10.1515/dx-2022-0024
  • Lessing A & Lessing JN. “Unexpected Worry with Increasing Survivorship: A Patient's Story of MPNST Pseudoprogression Mistaken as Recurrence.” The Diagnostic Error in Medicine 14th Annual International Conference. Diagnosis, vol. 9, no. 2, 2022, pp. 294-386, online eA60. https://doi.org/10.1515/dx-2022-0024
  • Mistry M & Lessing JN. "Intention to Treat": Judicious Antibiotic Use In Asymptomatic Bacteriuria.” The Diagnostic Error in Medicine 14th Annual International Conference. Diagnosis, vol. 9, no. 2, 2022, pp. 294-386, online eA60-1. https://doi.org/10.1515/dx-2022-0024
  • Scudder D, Weinberg M, Freifeld A, Lessing JN. “A Snapshot in Time: The Challenge to Meet Diagnostic Criteria in a Patient with Hemophagocytic Lymphohistiocytosis.” The Diagnostic Error in Medicine 14th Annual International Conference. Diagnosis, vol. 9, no. 2, 2022, pp. 294-386, online eA62-3. https://doi.org/10.1515/dx-2022-0024
  • Ackil A, Lessing J, Pearce B, and Smith T. (2022-05-02). A 29-year-old male presenting with cough and hematemesis. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/134yqvduci5d89bflahn9imk1
  • Brickson C, Lessing J, Ururahy R and Kumfer A. (2022-05-03). 47-year-old man with headaches, fever, and dark urine. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/4r0xnol4fwvhnokzaczjhm527
  • Adams B, Lorenzi F, Lessing J, Rezigh A, and Smith T. (2022-05-04). An 82 year-old woman presenting with worsening confusion. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/3w2tym64q2q5k6csnppntojtx
  • Mistry N, Lessing J, Rezigh A, and Kumfer A. (2022-05-05). 35-year old man presenting with shortness of breath. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/1k1bo02ipcw9zr9mthns6l787
  • Curchin A, Lessing J, Ururahy R, and Kumfer A. (2022-05-06). A 57-year-old woman with nausea, abdominal and back pain. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/2qx5av818mez7rhyht6dhz9gy
  • Moudgal A, Lessing J, Pearce B, and Smith T. (2022-05-11). A 71-year-man presenting with generalized weakness and dyspnea. The Human Diagnosis Project, Global Morning Report. Available online at:[goog_1451391219] https://www.humandx.org/o/bvj1fwtmkwbij0vq7kjls2igl
  • Jenks C, Misky G, Lessing J. 37-year-old man presenting with diffuse, erythematous rash. The Human Diagnosis Project, Global Morning Report. Available online.
  • Horton S, Lessing J. 56-year-old immunosuppressed woman presenting with exertional dyspnea. The Human Diagnosis Project, Global Morning Report. Available online.
  • Metz J, Briggs H, Lessing J. 54-year-old woman who presenting with acute encephalopathy for the last 3 weeks. The Human Diagnosis Project, Global Morning Report. Available online.
  • Lessing AJ, Cote GM, DeLaney TF, Plotkin SR, Raskin KA, Lessing JN. Pseudoprogression of Malignant Peripheral Nerve Sheath Tumor in Patient with Neurofibromatosis Type 1, a Case Report. Case Rep Oncol. 2021 Sep-Dec;14(3):1342-1346. PubMed PMID: 34720939
  • Lessing JN, Mark NM, Pierce RG. How to Get More Juice From Each Squeeze: Maximizing Outputs From Academic Efforts. Acad Med. 2021 Oct 12. [Epub ahead of print] PubMed PMID: 34647924
  • Lessing JN, McGarry K, Schiffman F, Austin M, Hepokoski M, Keniston A, Tammaro D, Finn KM. The State of Morning Report in the Current Healthcare Landscape: a National Survey of Internal Medicine Program Directors. J Gen Intern Med. 2021 Sep 28. [Epub ahead of print] PubMed PMID: 34585310
  • Crowe B, Eckstrom E, Lessing JN. Missed Opportunity for Fall Prevention: A Teachable Moment. JAMA Intern Med. 2021 May 1;181(5):689-690. PubMed PMID: 33749713
  • Lessing JN, Yazdani Farsad Y, Cumbler E. Letter to the Editor: Eradicating Jargon-Oblivion-A Proposed Classification System of Medical Jargon. J Gen Intern Med. 2021 Apr;36(4):1111. PubMed PMID: 33506389
  • Crowe B, Tahhan SG, Lacy C, Grzankowski J, Lessing JN. Things We Do for No Reason™: Routine Correction of Elevated INR and Thrombocytopenia Prior to Paracentesis in Patients with Cirrhosis. J Hosp Med. 2021 Feb;16(2):102-104. PubMed PMID: 32966201
  • Lessing JN, Wallace MA. “The Seed for the ‘Forest for the Trees’ Humanism in Medicine Story Contest.” American College of Physicians Council of Early Career Physicians series How’d They Do That? September 2021. https://www.acponline.org/about-acp/who-we-are/leadership/boards-committees-councils/council-of-early-career-physicians/cecp-newsletter/archive/september-2021/howd-they-do-that
  • Holec K, Lessing J, Kumfer A, Jackson C. (2021-04-19). 53-year-old woman presenting with confusion and weakness. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/5gm4hj5gcp7flolluaqki7vvi
  • Sullivan K, Lessing J, Ford B, Smith T. (2021-05-03). 81-year-old female presenting with spontaneous bruising. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/ckzm41jl45z4h91evpkrlrvzm
  • Klimenko M, Lessing J, Smith T, Kumfer A. (2021-05-04). A 62-year-old man presenting with rash. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/02kz2k0wrwb08czh5d9hgftgs
  • Mistry N, Lessing J, Al Danaf J, Jackson C. (2021-05-06). 42-year-old woman presenting to the ED with worsening leg swelling. The Human Diagnosis Project, Global Morning Report. Available online at: https://www.humandx.org/o/7hp9wrohq4xlj9ldpcgipi71i
  • *Benjamin Staum, Juan N. Lessing, *Deepa Ramadurai. Overuse Phlebotomy and Impact on Organ Transplant. Colorado Chapter American College of Physicians, virtual conference, February 4-6, 2021.
  • Andres Lessing & Juan N. Lessing. “Unexpected Worry with Increasing Survivorship: A Patient's Story of MPNST Pseudoprogression Mistaken as Recurrence.” Diagnostic Error in Medicine 14th Annual International Conference, Society to Improve Diagnosis in Medicine, virtual conference, October 25-27, 2021.
  • *David Scudder, *Molly Weinberg, *Alana Freifeld, Juan N. Lessing. “A Snapshot in Time: The Challenge to Meet Diagnostic Criteria in a Patient with Hemophagocytic Lymphohistiocytosis.” Diagnostic Error in Medicine 14th Annual International Conference, Society to Improve Diagnosis in Medicine, virtual conference, October 25-27, 2021.
  • *Cecilia Levandowski, *Anna Buehler, Juan N. Lessing, Reem Hanna. “Diabetes, Drinking, and Dirt: A Cautionary Tale of Disseminated Nocardiosis.” Diagnostic Error in Medicine 14th Annual International Conference, Society to Improve Diagnosis in Medicine, virtual conference, October 25-27, 2021.
  • *Eva Stein, Tyler Anstett, Laura Foster, Juan N. Lessing. “How We Frame Diagnostic Error In Comfort-Focused Settings: A Case of Missed Coccidioides.” Diagnostic Error in Medicine 14th Annual International Conference, Society to Improve Diagnosis in Medicine, virtual conference, October 25-27, 2021.
  • Neelam Mistry & Juan N. Lessing. "Intention to Treat": Judicious Antibiotic Use In Asymptomatic Bacteriuria.” Diagnostic Error in Medicine 14th Annual International Conference, Society to Improve Diagnosis in Medicine, virtual conference, October 25-27, 2021.
  • Crowe B, Tahhan SG, Lacy C, Grzankowski J, Lessing JN. Things We Do for No Reason™: Routine Correction of Elevated INR and Thrombocytopenia Prior to Paracentesis in Patients with Cirrhosis. J Hosp Med. 2020 Sep 23. [Epub ahead of print] PubMed PMID: 32966201
  • Lessing JN, Anderson LR, Mark NM, Maggio LA, Durning SJ. Academics in Absentia: An Opportunity to Rethink Conferences in the Age of Coronavirus Cancellations. Acad Med. 2020 Dec;95(12):1834-1837. PubMed PMID: 32852317
  • Lessing JN, Rendón P, Durning SJ, Roesch JJ. Approaches to Clinical Reasoning Assessment. Acad Med. 2020 Aug;95(8):1285. PubMed PMID: 31972679
  • Lessing JN, Wheeler DJ, Beaman J, Diaz MJ, Dhaliwal G. How to facilitate an unscripted morning report case conference. Clin Teach. 2020 Aug;17(4):360-365. PubMed PMID: 31749299
  • Greenblatt HK, Lessing JN, Cumbler C. “A Head-Scratcher Without An Itch: Presumptive Primary Biliary Cholangitis In An Elderly Man.” J Gen Intern Med. 2020.
  • Waymel W, Hudler A, Lessing JN. “Searching for the Antigen: A Case of Recurring Hypoxia.” J Gen Intern Med. 2020.
  • McGee C, Lessing JN. “Speed Up a Slow Down: Recognizing GLP-1 Gastroparesis and SGLT-2 Euglycemic DKA.” J Gen Intern Med. 2020.
  • Lewien P, Lessing JN, Dietsche C. “A Common Drug Causing An Unusual Eruption: Furosemide Triggering Bullous Pemphigoid.” J Gen Intern Med. 2020.
  • Lessing JN, Wheeler DJ, Beaman J, Diaz MJ, Dhaliwal G. How to facilitate an unscripted morning report case conference. Clin Teach. 2019 Nov 20. [Epub ahead of print] PubMed PMID: 31749299
  • Lessing JN, Bryan S, Johnson C, Keating J, Guerrasio J. Junior doctor remediation: an international reflection. Med J Aust. 2019 Dec;211(11):507-508.e1. PubMed PMID: 31742697
  • Lessing JN, Manesh R. Orbital Cellulitis with Subperiosteal Abscess (with Video). J Gen Intern Med. 2019 Nov;34(11):2684-2686. PubMed PMID: 31485972
  • Lane KP, Chia C, Lessing JN, Limes J, Mathews B, Schaefer J, Seltz LB, Turner G, Wheeler B, Wooldridge D, Olson AP. Improving Resident Feedback on Diagnostic Reasoning after Handovers: The LOOP Project. J Hosp Med. 2019 Oct 1;14(10):622-625. PubMed PMID: 31433779
  • Lessing JN, Lacy ME. A Student Reflection on Doctoring With Confidence. Ann Intern Med. 2019 May 21;170(10):739. PubMed PMID: 31108532
  • Lessing JN, Slingsby TJ, Betz M. Hyperacute Gonococcal Keratoconjunctivitis. J Gen Intern Med. 2019 Mar;34(3):477-478. PubMed PMID: 30652276
  • Subramanian A, Connor DM, Berger G, Lessing JN, Mehta N, Manesh R, Kohlwes J. A Curriculum for Diagnostic Reasoning: JGIM's Exercises in Clinical Reasoning. J Gen Intern Med. 2019 Mar;34(3):344-345. PubMed PMID: 30334181
  • Lessing JN, McGee S. Therapy for Cellulitis. JAMA. 2016 Nov 15;316(19):2046-2047. PubMed PMID: 27838713
  • Lessing JN, Mathias PC, Pierce RG. A Tincture of Time-Latent Crystal Formation and Clinical Decision-Making in Acute Gout: A Teachable Moment. JAMA Intern Med. 2016 Feb;176(2):165-6. PubMed PMID: 26658830
  • Mark NM, Lessing JN, Çoruh B. Crowning achievement: a case of dental aspiration. Radiol Case Rep. 2015 Dec;10(4):36-8. PubMed PMID: 26649115
  • Mark NM, Lessing JN, Buckley SA, Tierney LM Jr. Diagnostic Utility of Food Terminology: Culinary Clues for the Astute Diagnostician. Am J Med. 2015 Sep;128(9):933-5. PubMed PMID: 25863151
  • Crowe B, Eckstrom E, Lessing JN. Missed Opportunity for Fall Prevention: A Teachable Moment. Accepted to JAMA IM.
  • Lessing JN, Mark NM, Pierce RG. AM Last Page: How to Get More Juice From Each Squeeze: maximizing outputs from academic efforts. Accepted to Academic Medicine.
  • Lessing JN, Yazdani Farsad Y, Cumbler E. Eradicating Jargon-Oblivion—A Proposed Classification System of Medical Jargon. Accepted to J Gen Intern Med.
  • Crowe BD, Lessing JN. Routine Correction of Elevated INR and Thrombocytopenia Prior to Paracentesis in Patients with Cirrhosis. Accompanying Slide Deck, 2021. Tool published at (***link to be added by JHM)
  • Lessing JN, Pierce RG, Dhaliwal G. Teaching More About Less: Preparing Clinicians for Practice. Accepted to The American Journal of Medicine.
  • Lessing JN. “Brick by Brick: The Advocacy Journey of Dr. Lilia Cervantes.” The Pharos.
  • Fischer C, Lessing JN. Commentary on Diagnostic Errors in Hospitalized Adults Who Died or Were Transferred to Intensive Care. In Practice Update: Respiratory Medicine. 2024.
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Practice Locations

UCHealth University of Colorado Hospital (UCH)
12605 E. 16th Ave
Aurora, CO 80045
720-848-0000

Hospital Affiliation
  • University of Colorado Hospital

Specialty Information

Specialties
  • Internal Medicine, Board Certification (2014)

General Information

Medical Schools:
  • MD, University of California, San Francisco, School of Medicine (2011)
Undergraduate Schools:
  • BA, Princeton University (NJ) (2005)
Internships:
  • University of Washington Program (2012)
Residency Programs:
  • University of Washington Program, Chief Resident, Internal Medicine (2015)
Department: Medicine-Hospital Medicine
Contact Us
CU Anschutz
Fitzsimons Building

13001 East 17th Place
Campus Box C290
Aurora, CO 80045

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