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Greg B. Diette

Greg B. Diette, MD

Pulmonology

Accepting New Patients

Highlights

Age Groups Seen

  • Young Adult 18-25
  • Adult 26-64
  • Older Adult 65+

Languages

  • English

Gender

Male

Johns Hopkins Affiliations:

  • Johns Hopkins School of Medicine Faculty

About Greg B. Diette

Primary Academic Title

Professor of Medicine

Johns Hopkins Physician

Logo for Johns Hopkins Physician

Background

Dr. Gregory Diette is a professor of medicine at the Johns Hopkins University School of Medicine. He holds a joint appointment in the Department of Epidemiology in the Johns Hopkins Bloomberg School of Public Health. He has over 20 years of experience diagnosing and managing complex and challenging pulmonary conditions. He is expert in the diagnosis and treatment of patients with common conditions such as asthma and COPD, as well as uncommon conditions such as allergic bronchopulmonary aspergillosis (ABPA), bronchiolitis obliterans, hypersensitivity pneumonitis and others.  His practice includes evaluation of patients with unexplained shortness of breath and cough as well as patients with a variety of environmental lung conditions. In addition to his outpatient practice, Dr. Diette provides inpatient care on the pulmonary, critical care and internal medicine services.

Dr. Diette earned his M.D. from the Temple University School of Medicine. He completed his residency at the Hospital of the University of Pennsylvania and performed a fellowship in pulmonary and critical care medicine at Johns Hopkins. He received his M.H.S. from the Johns Hopkins Bloomberg School of Public Health.

His research interests include environmental impacts on lung disease, epidemiology of airway disease and chronic obstructive pulmonary disease.

Centers and Institutes

Global Health, Center for

Contact for Research Inquiries

1830 E. Monument Street
5th Floor
Baltimore, MD 21205

Phone: (410) 502-7038
gdiette@jhmi.edu

Research Interests

Asthma, Chronic obstructive pulmonary disease, Environmental impacts on lung disease, Epidemiology of airway disease

Lab Website

Gregory Diette Laboratory

  • The Gregory Diette Laboratory studies the epidemiology of lung diseases. Our focus is on asthma, chronic obstructive pulmonary disease (COPD) and environmental causes of lung disease, including allergens and particulate matter.

Research Summary

Dr. Diette is a pulmonologist with a research focus on environmental causes of lung diseases. His work in asthma and COPD has included examining the impact of air pollution, allergens, diet, urban environment and health care disparities. He has been funded by the NIH, EPA and other organizations for his research.

Locations

  1. Johns Hopkins Bayview Medical Center
    • 5501 Hopkins Bayview Circle, Allergy & Asthma Center, 2nd Floor, Baltimore, MD 21224
    • Get Directions

Expertise

Education

  • Fellowship: Johns Hopkins University School of Medicine, Pulmonary and Critical Care Medicine, 1998
  • Graduate School: Johns Hopkins Bloomberg School of Public Health, Epidemiology, MHS, 1997
  • Residency: Hospital of the University of Pennsylvania , Internal Medicine, 1993
  • Medical Education: Temple University School of Medicine, MD, 1990

Insurance

Please contact the location directly to confirm your health plan is accepted.
Search plans
  • Aetna
  • CareFirst
  • Cigna
  • First Health
  • Geisinger Health Plan
  • HealthSmart/Accel
  • Johns Hopkins Health Plans
  • MultiPlan
  • Pennsylvania's Preferred Health Networks (PPHN)
  • Point Comfort Underwriters
  • Private Healthcare Systems (PHCS)
  • Veteran Affairs Community Care Network (Optum-VACCN)

Ratings & Reviews

5 out of 5

34 ratings, 13 reviews

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.

Overall Rating by Patient
Provider Listened Carefully
Provider Explained Things Clearly
Provider Knew Medical History
Provider Showed Respect
Provider Spent Enough Time
Search reviews
    5 out of 5 stars
    Reviewed on 3/23/2026

    Dr. Diette is the best! I am lucky to have him on my team.

    5 out of 5 stars
    Reviewed on 3/9/2026

    Dr Diette is fantastic. He's always prepared, thorough, listens intently to any concerns and patiently answers any questions. I trust him completely with my care and would recommend him without hesitation to any friends and family in need of pulmonary care. Top notch all around.

    5 out of 5 stars
    Reviewed on 3/2/2026

    This was my first visit with this provide. I felt comfortable with him and his assistant.

    5 out of 5 stars
    Reviewed on 2/9/2026

    Explains clearly and personable

    5 out of 5 stars
    Reviewed on 12/15/2025

    Very satisfied

    5 out of 5 stars
    Reviewed on 11/24/2025

    Terrific. Explains diagnosis, tests, management, in a clear and comprehensive fashion. Great demeanor.

    5 out of 5 stars
    Reviewed on 11/24/2025

    I came in from out of state for a second opinion. Great provider, caring, listened to all my concerns.

    5 out of 5 stars
    Reviewed on 10/13/2025

    Dr Diette is the absolute best pulmonogist. He is a wonderful listener.

    5 out of 5 stars
    Reviewed on 8/4/2025

    Dr. Diette smiles first. He puts you at ease. When he explains what is happening step by step.

    5 out of 5 stars
    Reviewed on 7/28/2025

    He took the time. I didn't really have a nurse explain anything to me. The doctor took care of me. He took extra time with me and explained all the procedures answered all my questions changed my medicine. I very much appreciate him and trust him implicitly.

    5 out of 5 stars
    Reviewed on 6/16/2025

    - Listen to my concerns- patient - knowledgeable - his assistant was very kind and showed interest in my condition

    5 out of 5 stars
    Reviewed on 6/16/2025

    Very understanding

    5 out of 5 stars
    Reviewed on 5/12/2025

    Takes the very best care of me. Has for years.