David Northrop Hager, M.D., Ph.D.

Headshot of David Northrop Hager
  • Director, Medical Intensive Care Unit
  • Associate Professor of Medicine


Pulmonary and Critical Care Medicine

Research Interests

Critical care medicine; Ventilator-induced lung injury; Acute lung injury; High Frequency Ventilation; Acute Patient Triage ...read more

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Insurance Information

Main Phone

Outside of Maryland & Washington D.C.

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The Johns Hopkins Hospital (Main Entrance)

Appointment Phone: 410-955-3467
1800 Orleans St.
Sheikh Zayed Tower, Suite 9121
Baltimore, MD 21287 map
Phone: 410-614-6292 | Fax: 410-367-2014

Johns Hopkins Outpatient Center (now called Levi Watkins, Jr., M.D., Outpatient Center)

Appointment Phone: 410-955-0670
601 N. Caroline St.
Baltimore, MD 21287 map
Phone: 410-955-6353


Dr. Hager is a specialist in Pulmonary and Critical Care Medicine. He is an expert in the diagnosis and management of all forms of acute respiratory failure, including asthma, pneumonia, C.O.P.D., neuromuscular diseases, and the acute respiratory distress syndrome. He also has extensive experience in the management of other life-threatening conditions such as pulmonary embolism, gastrointestinal hemorrhage, shock from sepsis, hypovolemia, and heart disease, and metabolic emergencies such as diabetic ketoacidosis and hyperosmolar states.

...read more


  • Director, Medical Intensive Care Unit
  • Director, Medical Intermediate Care Unit
  • Associate Professor of Medicine

Departments / Divisions



  • MD; Cornell University - Weill Cornell Medical College (1999)


  • Medicine; Johns Hopkins University School of Medicine (2002)


  • Pulmonary Medicine; Johns Hopkins University School of Medicine (2007)

Board Certifications

  • American Board of Internal Medicine (Critical Care Medicine) (2008)
  • American Board of Internal Medicine (Pulmonary Disease) (2007)

Research & Publications

Research Summary

Dr. Hager’s primary research focus is Intermediate Care, a hospital level of care for patients not sick enough to require intensive care, but whose care needs exceed what can be provided on a general medical ward.  Though highly prevalent, the benefit of intermediate care in terms of improved patient outcomes and reduced cost is unknown.  Interpretation of the few published studies of intermediate care is limited by very sparse descriptions of how IMCUs are organized and staffed, and what services and monitoring are permitted.  Dr. Hager has published the only detailed report of IMCU patient outcomes paired to an in-depth description of the IMCU’s staffing model, admission criteria, services, and monitoring ability.  However, due to variation in regional needs, institutional missions, clinical expertise, and limitations of physical resources, it is assumed that there is significant heterogeneity in the delivery of intermediate care in the US.  The optimization of this level of care is Dr. Hager’s primary independent research interest.

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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