
Highlights
Age Groups Seen
- Young Adult 18-25
- Adult 26-64
- Older Adult 65+
Languages
- English
In-Network Plans
View All Accepted Plans (11)Gender
MaleJohns Hopkins Affiliations:
- Johns Hopkins Community Physicians
About Justin Hahn
Johns Hopkins Physician
Background
Justin Hahn, D.O., is an internal medicine physician with Johns Hopkins Community Physicians. Dr. Hahn received his undergraduate degree from University of Maryland, College Park. He then went on to receive his medical degree from Nova Southeastern University College of Osteopathic Medicine in Fort Lauderdale, Florida. Shortly after, Dr. Hahn moved back north where he completed his internal medicine residency training at Cooper University Hospital in Camden, New Jersey.
Dr. Hahn is a Howard County native and grew up in Ellicott City. In his free time, he enjoys trying different restaurants, traveling, basketball and golf.
Locations
- Johns Hopkins Community Physicians - Rockville
- 14955 Shady Grove Road, Suite 100, Rockville, MD 20850
- Get Directions
- phone: 301-990-3190
- fax: 410-367-2021
Expertise
Education
- Residency: Cooper University Hospital, Internal Medicine, 2023
- Medical Education: Nova Southeastern College of Osteopathic Medicine, DO, 2020
Board Certifications
- Internal Medicine: American Board of Internal Medicine, 2023
Insurance
- 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)
Ratings & Reviews
4.9 out of 5
385 ratings, 154 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
I told Dr. Hahn that I am very fortunate to receive care from him and [staff].
- 5 out of 5 starsReviewed on 3/18/2026
Excellent and professional
- 5 out of 5 starsReviewed on 3/17/2026
All satisfactory. No complaints.
- 5 out of 5 starsReviewed on 3/16/2026
Very satisfied.
- 5 out of 5 starsReviewed on 3/13/2026
Very good, caring, and knowledgeable
- 5 out of 5 starsReviewed on 3/11/2026
Exceptional Doctor
- 5 out of 5 starsReviewed on 3/10/2026
Very good Dr helping and explain any questions of pstient.
- 5 out of 5 starsReviewed on 3/10/2026
Dr. Hahn and his nurse, [staff], are SUPERB! They have made my health better and my spirit improve!
- 5 out of 5 starsReviewed on 3/9/2026
He is competent and professional
- 5 out of 5 starsReviewed on 3/6/2026
Dr Hahn actually read my reports from the hospital, had excellent bedside manner, explained complex topic in easy to understand way was patient with questions, gave me a referral I wanted within the hopkins system for an ENT and after he took the staples and sutures carefully out of my head did not laugh or get mad when I asked how soon I can color my hair he gave me his recommendation and told me the rationale and what I could look for and gave me at home instructions
- 5 out of 5 starsReviewed on 3/4/2026
Dr. Hahn is amazing. Great bedside manner, takes his time with you, yet efficient. He remembers information about you and seems familiar with your medical conditions and situation. He is sincere and really listens. He is willing to work with you towards your health goals. He is very pleasant. Another thing that stands out is that Dr. Hahn is very responsive to Secure Messages. He will often respond prior to an assistant intervening initially. I feel very comfortable with Dr. Hahn and how he addresses my health concerns.
- 5 out of 5 starsReviewed on 3/3/2026
Provider has good communication attributes and is well organized with inquiry on my specific health issues and solutions.
- 5 out of 5 starsReviewed on 3/3/2026
Doctor is very friendly and provides good breakdown on future appointments
- 5 out of 5 starsReviewed on 3/2/2026
Professional, courteous and thorough.
- 5 out of 5 starsReviewed on 3/2/2026
Dr. Hahn is great. Very caring and competent
- 5 out of 5 starsReviewed on 2/27/2026
Very attentive to my concerns and thorough in describing their impact on my health specifically and in general.
- 5 out of 5 starsReviewed on 2/25/2026
Excellent provider, attentive and professional... Everything you could hope to expect.
- 5 out of 5 starsReviewed on 2/24/2026
Dr.Hahn is well prepared when I went for my visit. He always goes an extra mile to make sure everything works out. Very attentive and has a good listening ear to address any issues . We are blessed to have him.
- 5 out of 5 starsReviewed on 2/24/2026
Young, but well-informed and caring.
- 5 out of 5 starsReviewed on 2/23/2026
Superb. He Is. Thorough And very personable. His bedside manner is excellent
- 5 out of 5 starsReviewed on 2/18/2026
I am new with Dr Hahn and so far it's been a great change for me
- 5 out of 5 starsReviewed on 2/18/2026
Dr Hahn is Great!!!!!
- 5 out of 5 starsReviewed on 2/18/2026
Dr. Hahn is a kind, caring doctor who listens to his patients. He's the best GP I've ever had and I'm so glad I found him.
- 5 out of 5 starsReviewed on 2/18/2026
Dr. Hahn is patient and respectful in answering my questions.
- 5 out of 5 starsReviewed on 2/17/2026
Dr Hahn communicates well and listens to client concerns. The client is an active participant in the plan of care. I appreciated Dr Hahn's prompt response to my recent lab work and implementation of medication changes as we had discussed in my visit, as well as plans for ongoing follow up.
- 5 out of 5 starsReviewed on 2/13/2026
I'm glad to be Dr. Hahn's patient as he is attentive, provides excellent feedback, and overall a caring physician!
- 5 out of 5 starsReviewed on 2/13/2026
Great doctor
- 5 out of 5 starsReviewed on 2/13/2026
Justin Hahn always has a good grasp of my medical history and is easy to communicate with.
- 5 out of 5 starsReviewed on 2/11/2026
Dr. Justin Hahn was right on with his diagnosis and helped me. Feeling so much better and clearly thank Dr.Hahn for his good advice and listening to me.
- 5 out of 5 starsReviewed on 2/11/2026
He is very attentive and explaining everything about my condition and listen when I interrupt and ask questions.
- 5 out of 5 starsReviewed on 2/11/2026
Very flexible, had to change your video visit at the last minute and they were very accommodating.
- 5 out of 5 starsReviewed on 2/11/2026
Dr. Hahn is excellent provider with supportive bedside manner
- 5 out of 5 starsReviewed on 2/10/2026
He's very relaxed. He's also gives very informative answers.
- 5 out of 5 starsReviewed on 2/9/2026
I just recently got my Medicare Part B, and I came back to JH because of Dr. Hahn. He is just an awesome doctor and person
- 5 out of 5 starsReviewed on 2/6/2026
Dr Hahn is empathetic and takes his time to explain all the issues , he has attention to detail. He also respond promptly to my questions in the my chart portal
- 5 out of 5 starsReviewed on 2/2/2026
Dr Hahn is very thorough and aware of previous visits and discussions, handling this annual evaluation very well
- 5 out of 5 starsReviewed on 1/30/2026
HI. I was there for a pre-op physical. Everything went fine.
- 5 out of 5 starsReviewed on 1/28/2026
Dr Hahn is knowledgeable and personable. He asked all the right questions.
- 5 out of 5 starsReviewed on 1/27/2026
Video call had sound problems, so dr called me on my cellphone and we were able to complete meet via phone.
- 5 out of 5 starsReviewed on 1/27/2026
He is an excellent doctor and I love him
- 4 out of 5 starsReviewed on 1/26/2026
Five Star, always concerned, very thorough, professional, genuinely concerned about my health. Excellent Doctor and person.
- 5 out of 5 starsReviewed on 1/26/2026
Dr Hahn is one of the best doctors I have ever had. He patiently and in easy to understand terms explains his diagnosis and treatment options.
- 5 out of 5 starsReviewed on 1/21/2026
Dr. Justin Hahn is a very good doctor. He listened carefully of what you said and explained things clearly with patience.
- 5 out of 5 starsReviewed on 1/21/2026
Excellent doctor with whom I have established a trusting and purposeful relationship. He is thorough and knowledgeable and works with me to establish plans for my best health practices.
- 5 out of 5 starsReviewed on 1/21/2026
Good listener and reduces unnecessary concern
- 5 out of 5 starsReviewed on 1/20/2026
As a senior citizen, I felt respected by Dr.Hahn and appreciated his thoughtfulness and expertise.
- 5 out of 5 starsReviewed on 1/16/2026
Good doctor. Listens to my request. Cares
- 5 out of 5 starsReviewed on 1/14/2026
My provider is extremely thorough, listened intently, provided advice and was extremely clear on helping me remain healthy and reach goals medically.
- 5 out of 5 starsReviewed on 1/14/2026
Overall are very pleasant
- 5 out of 5 starsReviewed on 1/12/2026
Provider was excellent.
- 5 out of 5 starsReviewed on 1/12/2026
He is very professional, courteous and knowledgeable
- 5 out of 5 starsReviewed on 1/9/2026
I value my provider and don't want to change
- 5 out of 5 starsReviewed on 1/6/2026
He is vary good and and takes time with me. I am old and he keeps on top of things for me.
- 5 out of 5 starsReviewed on 1/5/2026
Very thorough and helpful
- 5 out of 5 starsReviewed on 12/31/2025
Doctor is very good.
- 5 out of 5 starsReviewed on 12/31/2025
Dr. Hahn is very professional, a good listener, and thorough with his questions and examinations.We had a good laugh when I told him he looked like a senior in high school that I used to teach, mentioning that I was really old!!
- 5 out of 5 starsReviewed on 12/30/2025
Dr. Hahn was very professional. He was kind. He gave me a thorough preop physical exam.
- 5 out of 5 starsReviewed on 12/30/2025
Dr.Hahn,Very Good listener. He was very knowledgeable and involved in any information that was discussed by me or brought up by myNiece. He's very open to questions and put me at ease right away . I will recommend him to friendsLooking for an A+ doctor. I had met with Dr. H. ,A couple years ago , when my Dr. ( Dr., [staff]) wasn't available.... I was impressed withDr. H. Then and I was delighted to get an appointment with him again, Dec.? 30th , I think....?
- 5 out of 5 starsReviewed on 12/24/2025
Dr. Hahn
- 5 out of 5 starsReviewed on 12/24/2025
Dr Justin Hahn is an outstanding Physcian. He really takes the time to explain my health issues.
- 5 out of 5 starsReviewed on 12/19/2025
All the Doctorer in this office are very good
- 5 out of 5 starsReviewed on 12/17/2025
Dr. Hahn did an excellent job to treat me.
- 5 out of 5 starsReviewed on 12/17/2025
Like I already mentioned in the office to couple people this was one the best Medical experience I've ever had. My husband is a physician himself but when I was talking to him about my experience in the office today he was so amazed how organized , knowledgeable and helpful are the whole team is.Thank you so much again .
- 5 out of 5 starsReviewed on 12/16/2025
Dr. Hahn is thorough and very caring in his care.
- 5 out of 5 starsReviewed on 12/16/2025
My Provider has been very proactive, attentive and professional. He communicates in a personable manner
- 5 out of 5 starsReviewed on 12/12/2025
He is very gentle, very caring and professional. He is very knowledgeable
- 5 out of 5 starsReviewed on 12/10/2025
Dr. Hahn is great. My mom requires trauma-informed care, and he does a wonderful job providing the care she needs while being sensitive to her issues
- 5 out of 5 starsReviewed on 12/10/2025
I found Dr. Hahn knowledgeable, caring, and patient with my questions. He took the time with me to work through a problem with one of my medicines, and scheduled a six month visit for me to continue working through that problem. He strikes me as very dedicated to his work and dedicated to my concerns with that medicine. He is A wonderful representative for Hopkins.
- 5 out of 5 starsReviewed on 12/10/2025
Listened and discussed my health.Provided excellent care..
- 5 out of 5 starsReviewed on 12/9/2025
Dr. Justin Hahn
- 5 out of 5 starsReviewed on 12/9/2025
Dr. Justin Hahn Is truly exceptional. He is compassionate, patient, and extremely professional, and always attentive during appointments. He listens carefully, validates concerns, and takes the time to answer questions thoroughly while explaining everything in a clear and reassuring way. His empathy and calm approach make each visit feel comfortable and supportive. I always leave appointments feeling reassured, informed, cared for, and confident In my health. He is a wonderful doctor, and I would recommend him to family and friends.
- 5 out of 5 starsReviewed on 12/9/2025
Knowledgeable, listen to my concerns and providing me with alternatives
- 5 out of 5 starsReviewed on 12/8/2025
I found Dr Justin Hahn to be knowledgeable, thorough, with a good disposition.
- 5 out of 5 starsReviewed on 12/3/2025
Dr,Justin Hahn, was very nice and took the time to explain everything well. I wish I could have a doctor like this at every appointment.
- 5 out of 5 starsReviewed on 12/3/2025
Dr Hahn was excellent. I was there for new patient visit after moving here from Florida. I am very happy to have found such a great physician.
- 5 out of 5 starsReviewed on 12/2/2025
Provider functioned as it should
- 5 out of 5 starsReviewed on 12/2/2025
Dr. Hahn is amazing. He listens carefully, partners with me for my healthcare. He doesn't pass judgement and is open to thoughts I have. He communicates well, and is easy to work with on my healthcare challenges. He has a great ""bedside manner.""
- 5 out of 5 starsReviewed on 11/26/2025
Dr. Hahn impressed me a competent, professionl, and caring. We communicated well. He was up to date on my medical history. He wass most agreeble and pleasant to talk to and answered all my questions. I look forward to having him as my primary care physician for a long time.
- 5 out of 5 starsReviewed on 11/25/2025
Good Doctor
- 5 out of 5 starsReviewed on 11/25/2025
He is an excellent doctor
- 5 out of 5 starsReviewed on 11/25/2025
Confident in Dr. Hahn's knowledge and communication skills
- 5 out of 5 starsReviewed on 11/25/2025
Justin Hahn was recommended to me as a new primary physician. I really enjoyed our first appointment and found him very knowledgeable, informed and q good listener.
- 5 out of 5 starsReviewed on 11/24/2025
Dr. Hahn was kind, patient and very understanding in dealing with my concerns. Spoke in a clear, concise and slow manner, easy for me to understand.
- 5 out of 5 starsReviewed on 11/24/2025
Very compassionate and understanding with my medical conditions. I felt heard and respected.
- 5 out of 5 starsReviewed on 11/21/2025
He is excellent
- 5 out of 5 starsReviewed on 11/19/2025
Very professional,attentions and caring. He took his time to listen to me. I was very pleased with his care and consorne about my health.
- 5 out of 5 starsReviewed on 11/7/2025
Dr. Hahn is very knowledgeable, patient, and friendly. I am glad that I chose him to be my primary care doctor.
- 5 out of 5 starsReviewed on 11/5/2025
Very good
- 5 out of 5 starsReviewed on 11/5/2025
Got the good information during the visit
- 5 out of 5 starsReviewed on 11/3/2025
He is very knowledgeable, attentive and not rushing like other doctors. I like him.
- 5 out of 5 starsReviewed on 10/29/2025
Let me tell you frankly that although Dr. Hahn is young, he is well-experienced and knowledgeable.
- 5 out of 5 starsReviewed on 10/28/2025
Dr. Hahn was excellent
- 5 out of 5 starsReviewed on 10/28/2025
Easy to talk with. Can express myself well. He has a listening heart.
- 5 out of 5 starsReviewed on 10/28/2025
Justin Hahn, DO
- 5 out of 5 starsReviewed on 10/7/2025
Dr. Hahn has always demonstrated complete knowledge about all medical conditions that I asked him about. He is an outstanding physician.
- 5 out of 5 starsReviewed on 9/30/2025
Very knowledgeable and attentive to my needs
- 5 out of 5 starsReviewed on 9/29/2025
Dr. Hahn is always courteous and actively listens. I feel very comfortable with his care.
- 5 out of 5 starsReviewed on 9/19/2025
Very good.
- 5 out of 5 starsReviewed on 9/19/2025
It's always a pleasure to see Dr Hahn.
- 5 out of 5 starsReviewed on 9/9/2025
I was truly impressed with Dr Hahn, it was my first visit and I am glad I found him
- 5 out of 5 starsReviewed on 9/9/2025
My doctor could not see me for this appointment. However this Doctor was very concerned and patient. If my primary Doctor leaves this practice I would like him to take my case!
- 5 out of 5 starsReviewed on 9/5/2025
Dr Hahn is a good role model. He is not overweight or obese, unlike so many nurses and doctors.
- 5 out of 5 starsReviewed on 9/5/2025
I went to the doctor's office for an immediate concern. Dr. Hahn saw me promptly, and gave me good advice.
- 5 out of 5 starsReviewed on 9/3/2025
Very happy with my doctor who is responsive and has all my confidence.
- 5 out of 5 starsReviewed on 9/2/2025
Dr Hahn found out more info about my health through questions, which was good.
- 5 out of 5 starsReviewed on 9/2/2025
Knowledgeable, thorough, good communication skills
- 5 out of 5 starsReviewed on 8/29/2025
Knowledgeable and patient focused.
- 5 out of 5 starsReviewed on 8/26/2025
Dr. Hahn is an excellent physician. He has reviewed and is fully aware of my medical history; he treats the whole person; he anticipates and asks all the right questions.
- 5 out of 5 starsReviewed on 8/20/2025
Very knowledgeable, good listener, provides lot of medical information related to our health
- 5 out of 5 starsReviewed on 8/20/2025
Dr. Hahn is a good and patient doctor.
- 5 out of 5 starsReviewed on 8/20/2025
Very nice, easy to speak with.
- 5 out of 5 starsReviewed on 8/15/2025
Excellent experience
- 4 out of 5 starsReviewed on 8/12/2025
The provider is Ok. Communication with him is not too hard.
- 5 out of 5 starsReviewed on 8/8/2025
Dr Hahn very personable and covered possible treatments depending on test results
- 5 out of 5 starsReviewed on 8/8/2025
I am very happy with Dr. Hahn and the way he listens and explains things.
- 5 out of 5 starsReviewed on 8/6/2025
Physical exam felt incomplete.
- 5 out of 5 starsReviewed on 8/6/2025
Dr. Hahn is very knowledgeable, patient and thorough. I feel safe and confident with his diagnosis and recommendations
- 5 out of 5 starsReviewed on 8/5/2025
Wonderful Doctor
- 5 out of 5 starsReviewed on 8/4/2025
Excellent
- 5 out of 5 starsReviewed on 8/1/2025
Dr. Hahn is a great Primary care physician, who really listens to the patient and gives a thorough analysis of all the hospital medical records that had recently come to my file.
- 5 out of 5 starsReviewed on 7/29/2025
I've recommended Dr.Hahn to relatives and friends. As a senior citizen, for the first time I feeling somebody is not only listening but ""hearing"" me. Dr. Hahn is intelligent, thoughtful, and through.
- 5 out of 5 starsReviewed on 7/29/2025
Very good experience with Dr. Hahn and a very helpful lady at the reception, [staff]. She was beyond of kindness and helpfulness.
- 5 out of 5 starsReviewed on 7/29/2025
He listens to what I m saying and gives me suggestions to solve my problems.
- 5 out of 5 starsReviewed on 7/23/2025
Excellent provider
- 5 out of 5 starsReviewed on 7/18/2025
answers questions clearly.
- 5 out of 5 starsReviewed on 7/16/2025
This practice and Dr Hahn, particularly is gentle, caring and makes you feel comfortable in addition to offering good medical advice
- 5 out of 5 starsReviewed on 7/15/2025
He is professional.
- 5 out of 5 starsReviewed on 7/15/2025
Dr Hahn is attentive and knowledgeable and listens well
- 5 out of 5 starsReviewed on 7/14/2025
This was my first appointment with my new primary care physician. I was impressed and believe my health care is in good hands with this provider
- 5 out of 5 starsReviewed on 7/11/2025
I am happy with the provider, and he provided excellent suggestions.
- 5 out of 5 starsReviewed on 7/8/2025
Dr. Hahn is very professional. He makes you feel relaxed, comfortable and confident .
- 3 out of 5 starsReviewed on 6/25/2025
I think the dr is a good person. However, he told me at the last visit he was going to look into mast cell as he was concerned with what I've been going through, but either he didn't read through his notes or wasn't prepared, but I didn't feel remembered, he recommended things that we had talked about before that I didn't need so the appointment felt wasteful and I don't think he listened to me
- 4 out of 5 starsReviewed on 6/20/2025
He is nice and patience listening what I say
- 5 out of 5 starsReviewed on 6/18/2025
I am very happy with Dr. Hahn and my visit.
- 5 out of 5 starsReviewed on 6/18/2025
Mr. Hahn is a very nice Doctor. He always helps answer my questions and provides feedback. He helps explain things in a way for me to better understand.
- 5 out of 5 starsReviewed on 6/17/2025
A year ago was considering changing doctor due to his level of experience. Seemed better now will wait to see on follow up advice
- 5 out of 5 starsReviewed on 6/17/2025
I was very happy with my first meeting with Dr. Justin Hahn!
- 5 out of 5 starsReviewed on 6/16/2025
Dr. Hahn is fantastic, no notes.
- 5 out of 5 starsReviewed on 6/13/2025
I was able to get a video call very quickly after calling. Excellent response!
- 5 out of 5 starsReviewed on 6/11/2025
Great rapport very easy to talk to. Very willing to answer questions and concerns
- 5 out of 5 starsReviewed on 6/9/2025
Dr Hahn is very professional. His diagnosis is thorough and his responses are prompt. I am lucky to have him as my physician .
- 5 out of 5 starsReviewed on 6/3/2025
Experienced and efficient
- 5 out of 5 starsReviewed on 5/28/2025
I had very good attention and guidance
- 5 out of 5 starsReviewed on 5/21/2025
Always very thorough, attentive and easy to speak to.
- 5 out of 5 starsReviewed on 5/16/2025
Dr Hahn was excellent, but this was a hospital ER followup
- 5 out of 5 starsReviewed on 5/14/2025
I am very pleased with Dr. Hahn and Hopkins.
- 5 out of 5 starsReviewed on 5/14/2025
Excellent physician who was fully aware of my medial history, especially issues I wanted to address. He fully explained his analyses regarding assessments. His evaluations took into consideration the ""whole person.""
- 5 out of 5 starsReviewed on 5/12/2025
Showed interest in my well-being
- 5 out of 5 starsReviewed on 5/9/2025
First visit with Dr. Hahn. Pleased overall.
- 5 out of 5 starsReviewed on 5/6/2025
Overall Dr. Hahn was a thoughtful doctor caring about his patients
- 5 out of 5 starsReviewed on 5/5/2025
Dr. Hahn is a treasure in my life.
- 5 out of 5 starsReviewed on 4/23/2025
Very good and understandable. Did not rush at all. Listen and ask questions that need to be addressed.
- 5 out of 5 starsReviewed on 4/23/2025
Friendly and on time. Responsive to my questions.
- 5 out of 5 starsReviewed on 4/22/2025
In general, every thing is good