
Highlights
Johns Hopkins Affiliations:
- Johns Hopkins Community Physicians
About Peter Gerard Hamm
Johns Hopkins Physician
Background
Peter G. Hamm, M.D., is a pulmonologist with Johns Hopkins Medicine Pulmonology. Dr. Hamm is also the chairman of the department of medicine and the chairman of the intensive care unit (ICU) committee at Sibley Memorial Hospital.
Dr. has an expertise in annual physicals, acute and urgent care, disease management and pulmonary medicine. He earned his medical degree from Columbia University College of Physicians and Surgeons. He went on to complete his residency in internal medicine at St. Luke’s Hospital, followed by a fellowship in pulmonary medicine at Bellevue Hospital Center.
Dr. Hamm has been named a Top Doctor in the Washington, D.C., Baltimore and Washington-Baltimore areas by Castle Connolly. He has also been named a Top MD by Consumers’ Checkbook Magazine.
Dr. Hamm contributed to a publication on the diagnosis of pulmonary Kaposi’s sarcoma with fiberoptic bronchoscopy and endobronchial biopsy.
Locations
- Sibley Memorial Hospital
- 5215 Loughboro Road Northwest, Suite 400, Washington, DC 20016
- Get Directions
- fax: 301-656-1019
- JHCP Pulmonology Chevy Chase
- 5530 Wisconsin Avenue, Suite 1150, Chevy Chase, MD 20815
- Get Directions
- fax: 301-656-1019
Expertise
Education
- Fellowship: NYC Health+Hospitals/Bellevue, Pulmonary Medicine, 1985
- Residency: Mount Sinai St Luke's, Internal Medicine, 1983
- Medical Education: Columbia University in the City of New York, MD, 1980
Board Certifications
- Critical Care Medicine: American Board of Internal Medicine, 1987
- Pulmonary Disease: American Board of Internal Medicine, 1986
- Internal Medicine: American Board of Internal Medicine, 1983
Insurance
- First Health
- Geisinger Health Plan
- HealthSmart/Accel
- MultiPlan
- Pennsylvania's Preferred Health Networks (PPHN)
- Point Comfort Underwriters
- Private Healthcare Systems (PHCS)
Ratings & Reviews
4.9 out of 5
339 ratings, 139 reviewsThe 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.
- 5 out of 5 starsReviewed on 3/23/2026
Great job
- 5 out of 5 starsReviewed on 3/13/2026
Always a pleasure seeing Dr. Hamm. I trust his judgment and his guidance.
- 5 out of 5 starsReviewed on 3/11/2026
DR Hamm was so helpful in explaining how to read the CT of my chest. He is not only knowledgeable but patient and broke down complex ideas into simple easy to understand explanations.
- 5 out of 5 starsReviewed on 3/10/2026
Excellent
- 5 out of 5 starsReviewed on 3/9/2026
Thorough, clear, thoughtful, and efficient
- 5 out of 5 starsReviewed on 3/9/2026
Competent and courteous
- 5 out of 5 starsReviewed on 3/3/2026
Very good doctor
- 5 out of 5 starsReviewed on 3/3/2026
I have been Dr. Hamm's patient for over 25 years. He cares deeply about his patients and is ""the best version of himself"" every day with every patient. I have referred seriously ill patients to Dr. Hamm and they have expressed gratitude that their health problem was treated by such a caring, compassionate and experienced doctor.In our conversations, he asks questions referring to my file and follows up on tests or scans. He compares new data with records going back a long time. I always leave Dr. Hamm's office feeling better than when I walked in!
- 5 out of 5 starsReviewed on 2/25/2026
Dr Hamm is exceptional in my treatment conditions, very patient and attentive. I had written notes about my severe bout of respiratory problems which he reviewed in detail that helped significantly in diagnosing / follow-up treatment plan .
- 4 out of 5 starsReviewed on 2/24/2026
Dr. Hamm appeared very competent, and his advice was well-received.
- 5 out of 5 starsReviewed on 2/23/2026
Dr. Hamm was very helpful. We have follow on visits that I will schedule.
- 5 out of 5 starsReviewed on 2/23/2026
Dr Hamm was highly recommended when I needed a pulmonary specialist. This was my first visit and I, too, was impressed by his professionalism, knowledge, follow up and manner.
- 5 out of 5 starsReviewed on 2/19/2026
Dr Hamm right away at Sibly recognized what my needs were & had someone else verify so as to take immediate action.Dr. Hamm has open mind ready to listen and know what to to suggest in order to give the best of the best care. My friends & I who are his patients open our hands wide & our hearts with gratitude and trust. He ask questions & is very observant.
- 5 out of 5 starsReviewed on 2/17/2026
I did not meet with Dr. Hamm but with a technician in his office
- 5 out of 5 starsReviewed on 2/16/2026
Highly competent, highly conscientious and responsible.
- 5 out of 5 starsReviewed on 2/13/2026
Dr. Hamm is a terrific doctor-a respectful and excellent listener, a thorough physician, and a thoughtful counsellor.
- 5 out of 5 starsReviewed on 2/12/2026
Dr. Hamm reviewed and Discussed my results from ultrasound and x-ray Also provided a plan going forward to possible weaning To lesser dosage of blood thinner
- 5 out of 5 starsReviewed on 2/11/2026
Serious, well-informed, focused on my issues, thorough, and hospitable! A first visit for me, and I couldn't be more pleased and confident.
- 5 out of 5 starsReviewed on 2/10/2026
The provider, Dr. Hamm, administered excellent care.
- 4 out of 5 starsReviewed on 2/10/2026
Pleasant. I felt the exam was quick.
- 5 out of 5 starsReviewed on 2/6/2026
I've had a cough every morning for over 20 years. I came to see if I was still on the right medication. Dr. Hamm was the first doctot who talked to me about the root cause of the cough (likely an allergy that causes nasal issues that then cause the cough). He then changed the medication to something to ontrol the nasal issues that will likely result in no cough. I'm waiting to receive the new drug but will definitely try this.
- 5 out of 5 starsReviewed on 2/5/2026
Excellent care
- 5 out of 5 starsReviewed on 2/5/2026
Dr Hamm was first-rate. He listened well, responded thoughtfully, and made an excellent suggestion for treatment. I was absolutely satisfied.
- 5 out of 5 starsReviewed on 2/5/2026
Excellent professional service.
- 5 out of 5 starsReviewed on 2/4/2026
Dr Hamm acted In a professional manner and answered my questions when explaining my CTScans and what he observed on them. He ordered a CTScan W/O and a further appointment in two weeks.
- 5 out of 5 starsReviewed on 2/4/2026
Dr. Hamm's many years of experience were quite evident in his patient care. He was clear and thorough.
- 5 out of 5 starsReviewed on 2/4/2026
Dr. Hamm was extremely patient with my May inquiries. He went into great detail the results of my CT Scan including what he will continue to monitor.
- 5 out of 5 starsReviewed on 2/3/2026
I have seen Dr. Hamm for over 20 years. He is always on target with his advice. Strongly recommend hil
- 5 out of 5 starsReviewed on 1/27/2026
Dr. Hamm is very smart, very thorough, and very kind. He keeps extraordinary notes. I would recommend him to anyone who needs a pulmonologist.
- 5 out of 5 starsReviewed on 1/23/2026
Attentive and personal. Answered all concernd
- 5 out of 5 starsReviewed on 1/23/2026
Dr. Hamm was exceptional on asking me questions. This was my first visit I trust him and. Believe he will help my breathing
- 5 out of 5 starsReviewed on 1/21/2026
He was seemed knowledgable and was thorough.
- 5 out of 5 starsReviewed on 1/8/2026
Dr, Hamm is very thorough and professional.
- 4 out of 5 starsReviewed on 1/8/2026
He came unprepared, read aloud from previous notes to get informed.
- 5 out of 5 starsReviewed on 1/8/2026
Dr. Hamm apologized for the delay.
- 5 out of 5 starsReviewed on 1/2/2026
Very capable, takes lots of time to explain, answers all questions clearly.
- 5 out of 5 starsReviewed on 1/2/2026
Appreciate Dr. Hamm's very thorough review and explanations of my scans
- 5 out of 5 starsReviewed on 12/31/2025
Caring, courteous, thorough, open, professional, treats me as an intelligent adult, very open to answering my questions.
- 5 out of 5 starsReviewed on 12/29/2025
Excellent
- 5 out of 5 starsReviewed on 12/26/2025
Very helpful
- 5 out of 5 starsReviewed on 12/22/2025
Especially like the visual aids use in explainations.
- 5 out of 5 starsReviewed on 12/16/2025
Very professional and took time going over my previous visit,too.
- 5 out of 5 starsReviewed on 12/15/2025
Dr Hamm
- 5 out of 5 starsReviewed on 12/15/2025
Very good.
- 5 out of 5 starsReviewed on 12/11/2025
Great doctor!
- 5 out of 5 starsReviewed on 12/10/2025
Dr. Hamm has been my primary medical provider for many years. He always has been the very best.
- 5 out of 5 starsReviewed on 12/9/2025
Excellent care
- 5 out of 5 starsReviewed on 12/9/2025
Very competent
- 5 out of 5 starsReviewed on 12/8/2025
Dr. Hamm
- 5 out of 5 starsReviewed on 12/8/2025
Dr Hamm is very smart and knowledgeable so I know I'm in good hands
- 5 out of 5 starsReviewed on 12/5/2025
Dr. Hamm is professional, listens to my concerns and addresses them. He is never too busy to respond to me either in person, by phone or My Chart. I would highly recommend him
- 5 out of 5 starsReviewed on 12/2/2025
Dr Hamm is outstanding,extremely knowledgeable and caring.
- 5 out of 5 starsReviewed on 12/1/2025
Dr. Hamm listens. He provides options.
- 5 out of 5 starsReviewed on 11/28/2025
Very Professional and engaged.
- 5 out of 5 starsReviewed on 11/26/2025
I am satisfied with Dr.Hamm. Our relationship is long-standing.
- 5 out of 5 starsReviewed on 11/25/2025
All is well.
- 5 out of 5 starsReviewed on 11/25/2025
I see a number of doctors.General practitioner, cardiologist, nephrologist, electro cardiologist, and pulmonologist. (Hamm)Peter Hamm is by far the most knowledgeable of them all.And the care he provides me is beyond compareThank you, Dr. Hamm
- 5 out of 5 starsReviewed on 11/21/2025
Dr Hamm is knowledgeable and he listens. Listening carefully is so important.
- 5 out of 5 starsReviewed on 11/14/2025
Very grateful he ordered a CT scan and said he wanted to see me in a month to discuss the results. Also glad for how much he explained about the difficulty of going on an antibiotic for my chronic infection and why my condition didn't warrant it.
- 5 out of 5 starsReviewed on 11/13/2025
He listened very carefully and was very prepared.
- 5 out of 5 starsReviewed on 11/13/2025
Dr. Hamm is superb. Top-notch diagnostician.
- 5 out of 5 starsReviewed on 11/11/2025
Excellent
- 5 out of 5 starsReviewed on 11/10/2025
Excellent provider.
- 5 out of 5 starsReviewed on 11/5/2025
Thorough, polite, conscientious. He listen to you and provides responsible answers.
- 5 out of 5 starsReviewed on 10/16/2025
Excellnt provider
- 5 out of 5 starsReviewed on 10/14/2025
Haven't seen such a quality Doctor in a long time very knowledgeable excellent explanation and discovery process of my condition inspire respect and confidence
- 5 out of 5 starsReviewed on 10/14/2025
Dr Hamm is an excellent physician, listen to concerns and address accordingly. I am pleased and feel confident being his patient
- 5 out of 5 starsReviewed on 10/10/2025
Dr Hamm is professional, listens to my concerns, is never rushed and has provided me with the best care possible.
- 5 out of 5 starsReviewed on 10/10/2025
Dr Hamm is very good
- 5 out of 5 starsReviewed on 10/9/2025
Excellent provider
- 5 out of 5 starsReviewed on 10/6/2025
Completely professional.
- 5 out of 5 starsReviewed on 10/3/2025
Thorough
- 5 out of 5 starsReviewed on 10/2/2025
Dr Hamm was easy to talk with, he repeated to me for confirmation what he thought were my concerns, he checked me carefully and referred me for testing
- 5 out of 5 starsReviewed on 10/1/2025
Dr Hamm has been my doctor for over for about 30 years at least. I'm very satisfied with him. He's. An extremely dedicated doctor and extremely ethical and loyal to his patients. In the past, he has always reached out to me when I've had an exceptional need for him. He's been also working emergency medicine and someway at suburban Hospital beside his own long-standing practice. Thank you for the opportunity to share this information with you. Being on time is always important to him, and he strives for that in addition to his other great attributes
- 5 out of 5 starsReviewed on 9/22/2025
This Dr made me fell so comfortable and was easy to talk too and had all my previous information researched definitely ten stars
- 5 out of 5 starsReviewed on 9/19/2025
Exelente Doctor!
- 5 out of 5 starsReviewed on 9/18/2025
Dr. Hamm is clearly dedicated to resolving challenges I washaving to receive treatment with proper meds
- 3 out of 5 starsReviewed on 9/17/2025
I had to wait half an hour before I could see him.
- 4 out of 5 starsReviewed on 9/17/2025
Doctor was competent. He was quick to provide a solution to my problem rather than to explore the underlying reasons for the problem
- 5 out of 5 starsReviewed on 9/15/2025
Dr. Peter G Hamm
- 5 out of 5 starsReviewed on 9/15/2025
Great job
- 5 out of 5 starsReviewed on 9/15/2025
Big helpful by having video interpreter available
- 5 out of 5 starsReviewed on 9/12/2025
Dr. Hamm was very knowledgeable, and my pulmonary function test by [staff] was eye opening.
- 5 out of 5 starsReviewed on 9/10/2025
Previous doc retired. Getting to know each other. It went great.
- 5 out of 5 starsReviewed on 9/4/2025
Peter Hamm has been my doctor for over 35 years. He takes very good care of my health.
- 5 out of 5 starsReviewed on 9/3/2025
Excellent doctor so glad I was able to see him and he has ordered a breathing test so will see what's happens.
- 5 out of 5 starsReviewed on 8/29/2025
Dr. Hamm is outstanding; knowledgeable and a true pro
- 5 out of 5 starsReviewed on 8/27/2025
Dr Hamm is excellent in explaining myCondition as well as answering my questions I appreciate this very much
- 5 out of 5 starsReviewed on 8/25/2025
Excellent first visit. Great doctor.
- 5 out of 5 starsReviewed on 8/22/2025
Excellent and caring
- 5 out of 5 starsReviewed on 8/21/2025
Excellent and focused
- 5 out of 5 starsReviewed on 8/21/2025
Dr. Hamm has always been great to deal with. The one time I did disagree with his assessment of of a respiratory issue I was having, the next time I saw him he admitted he had been wrong, which is rare for a doctor and earned my respect.
- 5 out of 5 starsReviewed on 8/20/2025
Ver professional
- 5 out of 5 starsReviewed on 8/20/2025
Everyone at the office was nice, professional and helpful. Dr. Hamm is a good listener and knowledgeable.
- 5 out of 5 starsReviewed on 8/19/2025
Very knowledgeable, professional, friendly kind and caring and interested , not rushed
- 5 out of 5 starsReviewed on 8/19/2025
All good
- 5 out of 5 starsReviewed on 8/15/2025
Dr. Hamm is extremely thorough and explained everything to me in great detail. I very much appreciated his help.
- 5 out of 5 starsReviewed on 8/14/2025
The doctor spent a great deal of time with me to understand my issue and to determine a course of action. He was great at explaining possible outcomes, and I'm very grateful for his help.
- 5 out of 5 starsReviewed on 8/13/2025
Long-time, experienced,provider.
- 5 out of 5 starsReviewed on 8/12/2025
Useful visit
- 5 out of 5 starsReviewed on 8/5/2025
Dr. Hamm has been my physician for close to two decades and hopefully as long as I am alive.
- 5 out of 5 starsReviewed on 7/29/2025
Dr.Hamm went through a previous CT Scan and explained what different views of it meant. Most doctors don't take the time to do that. I really appreciated understanding a bit more about my health situation.
- 5 out of 5 starsReviewed on 7/28/2025
Dr Hamm was very courteous and took time to listen to my concerns. We went over previous X-rays and CAT Scans and he pointed out the results in a very clear and thorough approach.
- 5 out of 5 starsReviewed on 7/18/2025
Dr Hamm is responsive, professional and personable. He has taken good care of my mom over the past few years.
- 5 out of 5 starsReviewed on 7/17/2025
He carefully wEnt over the xrays and explainedthen showing the improvement in my lungs
- 5 out of 5 starsReviewed on 7/17/2025
Dr Hamm is very thorough and professional.
- 5 out of 5 starsReviewed on 7/16/2025
This was visit No.1.i think dr.will help cure me.
- 5 out of 5 starsReviewed on 7/16/2025
Dr. Hamm was prompt and hospitable. He asked a number of questions to help himself get oriented with my lung issues. I am also a Stage 4 cancer patient but the lungs are not involved. The CAT and PET scan results were thoroughly reviewed with the lungs being the focus of the review.
- 5 out of 5 starsReviewed on 7/15/2025
I definitely recommend this provider.
- 5 out of 5 starsReviewed on 7/15/2025
I was pleased with my visit. Dr. Hamm took his time and he was very thorough. He reviewed all of my information and the CT scans. He showed me the scans and explained the parts of the lung, what he saw and didn't see (based on the results). He was very emphatic about not agreeing with a diagnosis on the most recent test result. He prescribed some medicine and asked me to email him in (10) days to report how I was doing.
- 5 out of 5 starsReviewed on 7/10/2025
Dr Hamm is the best doctor I have ever encountered. He is knowledgeable, caring, spends time explaining and always listens to my concerns. We need more doctors like him.
- 5 out of 5 starsReviewed on 7/10/2025
Dr. Hamm is thorough and careful in his explanations. I learned from him and really appreciated being shown the scans and having them explained carefully.
- 5 out of 5 starsReviewed on 7/7/2025
Very intelligent, articulate, thorough and compassionate
- 5 out of 5 starsReviewed on 7/2/2025
Dr. Hamm is the ultimate professional. Knowldgeable, personable, and an excellent communicator.
- 5 out of 5 starsReviewed on 7/1/2025
Truly an outstanding doctor and my primary physician for many years.
- 5 out of 5 starsReviewed on 7/1/2025
All good
- 5 out of 5 starsReviewed on 6/19/2025
My visit was comfortable and informative.
- 5 out of 5 starsReviewed on 6/17/2025
Outstanding
- 5 out of 5 starsReviewed on 6/17/2025
Dr.Peter Hamm was very professional and kind during the office visit. I was very pleased with my appointment.
- 5 out of 5 starsReviewed on 6/16/2025
The doctor explained the results well, comparing the latest scan to the previous one to ascertain the condition of my lungs over the years.
- 5 out of 5 starsReviewed on 6/12/2025
Super clear questions and communications.
- 5 out of 5 starsReviewed on 6/12/2025
Totally knowledgeable
- 5 out of 5 starsReviewed on 6/6/2025
The best
- 5 out of 5 starsReviewed on 6/5/2025
Dr Hamm is an excellent physician
- 5 out of 5 starsReviewed on 6/3/2025
Very knowledgeable and professional. This was a follow up. Dr Hamm is able to balance efficiency and consideration for any questions that I may have. He successfully treated my reoccurring chronic bronchitis last year. I'm thankful!
- 5 out of 5 starsReviewed on 6/2/2025
Excellent care as always
- 5 out of 5 starsReviewed on 5/28/2025
Dr. Hamm is my pulmonologist. He is treating me for COPD with asthma crossover. My wife and I trust him completely.
- 5 out of 5 starsReviewed on 5/22/2025
Very professional, helpful and knowledgeable.
- 5 out of 5 starsReviewed on 5/20/2025
Takes an interest in total health.
- 5 out of 5 starsReviewed on 5/19/2025
Dr Hamm is very knowable and be careful In examination of my check up
- 5 out of 5 starsReviewed on 5/15/2025
Very clear and conciseInformation about what the problem is and what is the best way to address it.
- 5 out of 5 starsReviewed on 5/12/2025
Absolute one of the best specialist appointments I've ever had. Efficient, informative, friendly, no nonsense, thorough. Could not ask for more.
- 5 out of 5 starsReviewed on 5/12/2025
Dr. Hamm has been a top-rated doctor in the metro region for many, many years. I can attest to hs excellence.
- 5 out of 5 starsReviewed on 5/9/2025
I am so glad to have Dr.Hamm to treat my COPD with the satisfactory outcomes in the past few years .
- 4 out of 5 starsReviewed on 5/9/2025
He is a good doctor, he's just not very personable
- 5 out of 5 starsReviewed on 5/8/2025
Excellent!
- 5 out of 5 starsReviewed on 5/8/2025
Dr.Hamm read over the history& ER d/ c data carefully & asked appropriate questions regarding my overall health status.He asked me questions related to the data within the ER report& my understanding of It. He was pleasant and had a warm demeanor.
- 5 out of 5 starsReviewed on 5/1/2025
Dr Hamm was very attentive.
- 5 out of 5 starsReviewed on 4/17/2025
Dr. Hamm showed pictures of my CAT scan to me and explain what was going on with them. He asked that I have a follow up CAT scan done to see if the situation progressed or was the same. Gave me a specific dates to have this done and arranged a follow up appointment. I felt in very good care.