Gregory Ranches, MD

  • Critical Care Medicine
  • Pulmonary Disease
Gregory Ranches, MD
Treats adults


501 Washington St
San Diego, CA 92103
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Scripps Mercy Hospital San Diego
4077 Fifth Ave
San Diego, CA 92103
Get directions


  • Pulmonary Disease
  • Critical Care Medicine


  • English


Gregory P. Ranches, MD, is a pulmonologist and critical care medicine specialist. He treats a wide variety of lung diseases including asthma, COPD, interstitial lung disease and also specializes in the treatment of critically ill patients needing various forms of life support.

In addition, he has specialized training in the diagnosis and treatment of non-cystic fibrosis bronchiectasis, cystic fibrosis, nontuberculous mycobacterial infection and lung cancer/pulmonary nodules. He is experienced in bronchoscopy and endobronchial ultrasound for the non-invasive diagnosis and staging of lung cancer.  

He has research experience in the epidemiology of non-cystic fibrosis bronchiectasis and nontuberculous mycobacterial infection, and has participated in clinical drug trials for the treatment of these two conditions.  

Dr. Ranches is a San Diego native and proud alumnus of Mira Mesa High School. He enjoys spending his free time with family and friends.

Board Certifications

  • American Board of Internal Medicine, Critical Care Medicine, 2018
  • American Board of Internal Medicine, Pulmonary Disease, 2017
  • American Board of Internal Medicine, Internal Medicine, 2014

Medical Education

  • Jefferson Medical College, MD, 2011


  • Scripps Mercy Hospital San Diego, Internal Medicine, 2014


  • Oregon Health Sciences University, Pulmonary Disease and Critical Care Medicine, 2018

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