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Jonathan Jun, M.D.

Photo of Dr. Jonathan Jun, M.D.

Assistant Professor of Medicine


Languages: English, Mandarin

Expertise: Critical Care Medicine, Pulmonary and Critical Care Medicine, Pulmonary Medicine, Sleep Disorders

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Johns Hopkins Outpatient Center
Appointment Phone: 443-287-3313

601 N. Caroline St.
Suite 1261
Baltimore, MD 21287 map
Phone: 443-287-3313
Fax: 443-287-3312

Johns Hopkins Bayview Medical Center
Appointment Phone: 443-287-3313

5501 Hopkins Bayview Circle
Asthma and Allergy Center Suite 5B.81
Baltimore, MD 21224 map
Phone: 410-550-0115
Fax: 410-550-2612


Dr. Jonathan Jun is an assistant professor of medicine at the Johns Hopkins University School of Medicine. His areas of clinical expertise include pulmonary and critical care medicine.

Dr. Jun is a faculty member at the Johns Hopkins Hospital Sleep Disorders Center and a pulmonary and critical care medicine faculty member in the Sleep Medicine Fellowship Program at Johns Hopkins Bayview Medical Center.

Dr. Jun earned his M.D. from the University of Maryland School of Medicine. He completed his residency at Thomas Jefferson University Hospital and performed a fellowship in pulmonary and critical care medicine at Johns Hopkins.

He received a grant from the Baltimore Diabetes Research Center in 2012 to conduct research on the role of lipolysis in intermittent hypoxia-induced insulin resistance. He is a member of several professional organizations, including the American Academy of Sleep Medicine and the Association of Critical Care Medicine.

Dr. Jun conducts sleep and breathing research at the Polotsky Research Lab more


  • Assistant Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD, University of Maryland School of Medicine (2003)


  • Thomas Jefferson University Hospital (2006)


  • Johns Hopkins University School of Medicine / Pulmonary and Critical Care Medicine (2011)

Board Certifications

  • American Board of Internal Medicine / Critical Care Medicine (2015)
  • American Board of Internal Medicine / Pulmonary Disease (2013)
  • American Board of Internal Medicine / Sleep Medicine (2011)

Activities & Honors


  • First Place, Scientific Seminar Series, Johns Hopkins Postdoctoral Association, 2009


  • American Academy of Sleep Medicine
  • American Thoracic Society
  • Association of Critical Care Medicine

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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