John Fahy

MD MS

Pulmonologist

About me

Dr. John Fahy is a pulmonologist who has a special interest in treating patients with asthma and serves as director of UCSF’s severe asthma clinic. He also cares for critically ill patients in the intensive care units.

Fahey directs the UCSF Airway Clinical Research Center. His research receives funding from the National Institutes of Health and various foundations, as well as contracts from biotechnology and pharmaceutical companies. The center studies the underlying disease mechanisms of asthma, cystic fibrosis and other airway diseases.

Fahy earned his medical degree at University College Dublin After internal medicine training in Dublin, he completed fellowship training in pulmonary and critical care medicine at UCSF. He joined the faculty in 1993.

He is the Michael S. Stulbarg Endowed Chair in Pulmonary Medicine.

  • Education

    University College, Dublin Ireland, 1985

  • Residencies

    University College Dublin, Internal Medicine, 1989

  • Fellowships

    UCSF, Pulmonary Medicine, 1992

  • Board Certifications

    Internal Medicine, American Board of Internal Medicine

  • Academic Title

    Professor

Conditions I specialize in

  • Severe asthma

Asthma Clinic

400 Parnassus Ave., Fifth Floor
San Francisco, CA 94143-0359

(415) 353-2961
Th, 8:30 - 11:30 a.m.

Pulmonary Practice at Parnassus

400 Parnassus Ave., Fifth Floor
San Francisco, CA 94143

(415) 353-2961
M-F, 8 a.m. - 5 p.m.
Decorative Caduceus

The Effect of NAC on Lung Function and CT Mucus Score

This study evaluates 20% n-acetylcysteine (NAC) in the treatment of moderate-to-severe asthma that is complicated by mucus in the airway, as determined by CT imaging. The study is a crossover design, which means that...

Recruiting

Decorative Caduceus

Inpatient Clinical Trial of NAC

The purpose of this study is to determine the beneficial effect of n-acetylcysteine (NAC), an inhaled medication that breaks down mucus, on lung function. NAC is a medication approved by the US Food and Drug Administ...

Recruiting

Decorative Caduceus

CF And Effects of Drugs Mixed Ex Vivo With Sputum for Mucolytic Treatment

The investigators will collect samples of sputum from healthy volunteers and patients with cystic fibrosis for the purpose of: a) purifying airway mucins for plate-based binding studies and; b) assessment of the effe...

Recruiting

Decorative Caduceus

Characterization of Adult Subjects for Asthmatic Research Studies

This study is designed to characterize subjects in terms of the nature and severity of their asthma and in terms of conditions that may alter the clinical expression of asthma. Some features will be obtained in all s...

Recruiting

Decorative Caduceus

Characterizing Asthma Sputum Elasticity in the UCSF Severe Asthma Research Program

This study is designed to characterize subjects in terms of their sputum phenotype. The purpose of this study is to learn more about the impact of having abnormally elastic sputum on asthma severity by comparing subj...

Recruiting

Decorative Caduceus

Mechanisms of Exacerbation of Asthma

The purpose of this study is to identify the causes of asthma that were not previously suspected, to better understand the effects of inhaled steroids on asthma and to identify new way to treat asthma.

Recruiting

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