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Justin Hahn

Justin Hahn, DO

Internal Medicine

Accepting New Patients
Online Booking

Highlights

Age Groups Seen

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

Languages

  • English

Gender

Male

Johns Hopkins Affiliations:

  • Johns Hopkins Community Physicians

About Justin Hahn

Johns Hopkins Physician

Logo for 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

  1. Johns Hopkins Community Physicians - Rockville

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

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)

Ratings & Reviews

4.9 out of 5

385 ratings, 154 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

    I told Dr. Hahn that I am very fortunate to receive care from him and [staff].

    5 out of 5 stars
    Reviewed on 3/18/2026

    Excellent and professional

    5 out of 5 stars
    Reviewed on 3/17/2026

    All satisfactory. No complaints.

    5 out of 5 stars
    Reviewed on 3/16/2026

    Very satisfied.

    5 out of 5 stars
    Reviewed on 3/13/2026

    Very good, caring, and knowledgeable

    5 out of 5 stars
    Reviewed on 3/11/2026

    Exceptional Doctor

    5 out of 5 stars
    Reviewed on 3/10/2026

    Very good Dr helping and explain any questions of pstient.

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

    He is competent and professional

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

    Doctor is very friendly and provides good breakdown on future appointments

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

    Professional, courteous and thorough.

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

    Dr. Hahn is great. Very caring and competent

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 2/25/2026

    Excellent provider, attentive and professional... Everything you could hope to expect.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 2/24/2026

    Young, but well-informed and caring.

    5 out of 5 stars
    Reviewed on 2/23/2026

    Superb. He Is. Thorough And very personable. His bedside manner is excellent

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 2/18/2026

    Dr Hahn is Great!!!!!

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 2/18/2026

    Dr. Hahn is patient and respectful in answering my questions.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 2/13/2026

    Great doctor

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 2/11/2026

    Dr. Hahn is excellent provider with supportive bedside manner

    5 out of 5 stars
    Reviewed on 2/10/2026

    He's very relaxed. He's also gives very informative answers.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 1/30/2026

    HI. I was there for a pre-op physical. Everything went fine.

    5 out of 5 stars
    Reviewed on 1/28/2026

    Dr Hahn is knowledgeable and personable. He asked all the right questions.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 1/27/2026

    He is an excellent doctor and I love him

    4 out of 5 stars
    Reviewed on 1/26/2026

    Five Star, always concerned, very thorough, professional, genuinely concerned about my health. Excellent Doctor and person.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 1/21/2026

    Good listener and reduces unnecessary concern

    5 out of 5 stars
    Reviewed on 1/20/2026

    As a senior citizen, I felt respected by Dr.Hahn and appreciated his thoughtfulness and expertise.

    5 out of 5 stars
    Reviewed on 1/16/2026

    Good doctor. Listens to my request. Cares

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 1/14/2026

    Overall are very pleasant

    5 out of 5 stars
    Reviewed on 1/12/2026

    Provider was excellent.

    5 out of 5 stars
    Reviewed on 1/12/2026

    He is very professional, courteous and knowledgeable

    5 out of 5 stars
    Reviewed on 1/9/2026

    I value my provider and don't want to change

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 1/5/2026

    Very thorough and helpful

    5 out of 5 stars
    Reviewed on 12/31/2025

    Doctor is very good.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/30/2025

    Dr. Hahn was very professional. He was kind. He gave me a thorough preop physical exam.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/24/2025

    Dr. Hahn

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/19/2025

    All the Doctorer in this office are very good

    5 out of 5 stars
    Reviewed on 12/17/2025

    Dr. Hahn did an excellent job to treat me.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/16/2025

    Dr. Hahn is thorough and very caring in his care.

    5 out of 5 stars
    Reviewed on 12/16/2025

    My Provider has been very proactive, attentive and professional. He communicates in a personable manner

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

    He is very gentle, very caring and professional. He is very knowledgeable

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 12/10/2025

    Listened and discussed my health.Provided excellent care..

    5 out of 5 stars
    Reviewed on 12/9/2025

    Dr. Justin Hahn

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/9/2025

    Knowledgeable, listen to my concerns and providing me with alternatives

    5 out of 5 stars
    Reviewed on 12/8/2025

    I found Dr Justin Hahn to be knowledgeable, thorough, with a good disposition.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 12/2/2025

    Provider functioned as it should

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 11/25/2025

    Good Doctor

    5 out of 5 stars
    Reviewed on 11/25/2025

    He is an excellent doctor

    5 out of 5 stars
    Reviewed on 11/25/2025

    Confident in Dr. Hahn's knowledge and communication skills

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

    Very compassionate and understanding with my medical conditions. I felt heard and respected.

    5 out of 5 stars
    Reviewed on 11/21/2025

    He is excellent

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

    Very good

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

    Got the good information during the visit

    5 out of 5 stars
    Reviewed on 11/3/2025

    He is very knowledgeable, attentive and not rushing like other doctors. I like him.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 10/28/2025

    Dr. Hahn was excellent

    5 out of 5 stars
    Reviewed on 10/28/2025

    Easy to talk with. Can express myself well. He has a listening heart.

    5 out of 5 stars
    Reviewed on 10/28/2025

    Justin Hahn, DO

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 9/30/2025

    Very knowledgeable and attentive to my needs

    5 out of 5 stars
    Reviewed on 9/29/2025

    Dr. Hahn is always courteous and actively listens. I feel very comfortable with his care.

    5 out of 5 stars
    Reviewed on 9/19/2025

    Very good.

    5 out of 5 stars
    Reviewed on 9/19/2025

    It's always a pleasure to see Dr Hahn.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 9/3/2025

    Very happy with my doctor who is responsive and has all my confidence.

    5 out of 5 stars
    Reviewed on 9/2/2025

    Dr Hahn found out more info about my health through questions, which was good.

    5 out of 5 stars
    Reviewed on 9/2/2025

    Knowledgeable, thorough, good communication skills

    5 out of 5 stars
    Reviewed on 8/29/2025

    Knowledgeable and patient focused.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 8/20/2025

    Very knowledgeable, good listener, provides lot of medical information related to our health

    5 out of 5 stars
    Reviewed on 8/20/2025

    Dr. Hahn is a good and patient doctor.

    5 out of 5 stars
    Reviewed on 8/20/2025

    Very nice, easy to speak with.

    5 out of 5 stars
    Reviewed on 8/15/2025

    Excellent experience

    4 out of 5 stars
    Reviewed on 8/12/2025

    The provider is Ok. Communication with him is not too hard.

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

    Dr Hahn very personable and covered possible treatments depending on test results

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

    I am very happy with Dr. Hahn and the way he listens and explains things.

    5 out of 5 stars
    Reviewed on 8/6/2025

    Physical exam felt incomplete.

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

    Wonderful Doctor

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

    Excellent

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 7/29/2025

    He listens to what I m saying and gives me suggestions to solve my problems.

    5 out of 5 stars
    Reviewed on 7/23/2025

    Excellent provider

    5 out of 5 stars
    Reviewed on 7/18/2025

    answers questions clearly.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 7/15/2025

    He is professional.

    5 out of 5 stars
    Reviewed on 7/15/2025

    Dr Hahn is attentive and knowledgeable and listens well

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 7/11/2025

    I am happy with the provider, and he provided excellent suggestions.

    5 out of 5 stars
    Reviewed on 7/8/2025

    Dr. Hahn is very professional. He makes you feel relaxed, comfortable and confident .

    3 out of 5 stars
    Reviewed 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 stars
    Reviewed on 6/20/2025

    He is nice and patience listening what I say

    5 out of 5 stars
    Reviewed on 6/18/2025

    I am very happy with Dr. Hahn and my visit.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 6/17/2025

    I was very happy with my first meeting with Dr. Justin Hahn!

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

    Dr. Hahn is fantastic, no notes.

    5 out of 5 stars
    Reviewed on 6/13/2025

    I was able to get a video call very quickly after calling. Excellent response!

    5 out of 5 stars
    Reviewed on 6/11/2025

    Great rapport very easy to talk to. Very willing to answer questions and concerns

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 6/3/2025

    Experienced and efficient

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

    I had very good attention and guidance

    5 out of 5 stars
    Reviewed on 5/21/2025

    Always very thorough, attentive and easy to speak to.

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

    Dr Hahn was excellent, but this was a hospital ER followup

    5 out of 5 stars
    Reviewed on 5/14/2025

    I am very pleased with Dr. Hahn and Hopkins.

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

    Showed interest in my well-being

    5 out of 5 stars
    Reviewed on 5/9/2025

    First visit with Dr. Hahn. Pleased overall.

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

    Overall Dr. Hahn was a thoughtful doctor caring about his patients

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

    Dr. Hahn is a treasure in my life.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 4/23/2025

    Friendly and on time. Responsive to my questions.

    5 out of 5 stars
    Reviewed on 4/22/2025

    In general, every thing is good