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John Zachary Hughes

John Zachary Hughes, MD, MPH

Internal Medicine

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 John Zachary Hughes

Johns Hopkins Physician

Logo for Johns Hopkins Physician

Background

J. Zachary Hughes, MD, MPH, is the medical director of JHCP Sibley Primary Care specialized in Internal Medicine. He has clinical interests in comprehensive preventive medicine and management of diabetes mellitus. Prior to his career at Sibley Primary Care, he completed his medical residency at The Ohio State University, during which he was actively involved in medical education and received a Resident Teacher Award.

Dr. Hughes earned his Medical Degree at Drexel University, graduating with awards for clinical excellence. During medical school, he additionally completed his Masters in Public Health with a focus in Policy and Advocacy. In addition to his clinical interests, Dr. Hughes is a proponent for policies that support health living and well-being, such as his implementation of smoke-free policies on the Drexel University Campus and work with the Philadelphia Department of Public Health and Department of Health and Human Services in D.C.

Dr. Hughes is dedicated to a holistic approach to patient care and helps patients take steps to prevent and reduce disease.

Locations

  1. Sibley Memorial Hospital
    • 5215 Loughboro Road Northwest, Suite 300, Washington, DC 20016
    • Get Directions

Expertise

Education

  • Residency: The OSU Wexner Medical Center, Internal Medicine, 2020
  • Medical Education: Drexel University College of Medicine, MD MPH, 2017
  • Graduate School: Drexel University College of Medicine, MPH, 2016

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2020

Insurance

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

5 out of 5

340 ratings, 134 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.

Search reviews
    5 out of 5 stars
    Reviewed on 3/23/2026

    Excellent

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

    He is a great doctor

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

    He was very knowledgeable about my health and gave me advice so that I understand what my next step.

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

    Excellent

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

    Dr. Hughes is an excellent physician. The best.

    5 out of 5 stars
    Reviewed on 3/12/2026

    Great Guy

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

    Excellent PCP

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

    Dr. Hughes is very thorough, knowledgeable, respectful, and I trust him with my health.

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

    Dr Hughes thoughtful, knowledge, friendly

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

    Excellent care giver.

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

    Dr. Hughes is the best physician I have ever had. Very smart, very knowledgeable, very professional, great listener, very prepared with information about me. I trust him!

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

    Doctor Hughes made helpful suggestions, and he took action on every problem I brought up

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

    Dr. Hughes is kind and compassionate. I find him to be easy to talk and open up to. His recommendations were without judgment for which I am grateful.

    5 out of 5 stars
    Reviewed on 2/27/2026

    Dr. Hughes is an excellent physician. I have no complaints about his expertise. But in recent months, there have been last minute notifications of appointment cancelations due to changes in his schedule. This has been problematic.

    5 out of 5 stars
    Reviewed on 2/26/2026

    Good

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

    Because of a death in his family, my appt was changed to a virtual appt as soon as Dr. Hughes returned to DC which I greatly as I am going through cancer treatments and am not happy with my current oncologist. As I wanted a second opinion from the cancer center at Sibley, Dr. Hughes facilitated appointments with the center and not knowing that I already had an appointment with a surgeon, with a surgeon. I greatly appreciated his support and advocacy.

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

    Dr Hughes is an excellent physician and also the best director Hopkins Family Medicine has had - I hope you can keep him.

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

    Dr. Hughes

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

    In general, I'm satisfied with my provider.

    5 out of 5 stars
    Reviewed on 2/12/2026

    Dr Hughes is great

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

    Excellent physician

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

    Excellent doctor, always willing to listen. Never rushes you. Very thorough and caring.

    5 out of 5 stars
    Reviewed on 2/6/2026

    Exceptional A real gift

    5 out of 5 stars
    Reviewed on 2/6/2026

    Great and concerning doctor. Good listener. Good follow-ups

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

    Very attentive and friendly, with great knowledge.

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

    Excellent! Thorough, thoughtful, respectful, empathetic. He is the best.

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

    He's very kind and well-informed!

    5 out of 5 stars
    Reviewed on 1/29/2026

    He's the best doc I've ever had!

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

    Dr. Hughes is an excellent primary care physician.

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

    Dr. Hughes is very efficient. He covers my concerns and treats me when nessary. He is very knowledgeable and informative. I would definitely recommend Dr. Hughes and his stsff.

    5 out of 5 stars
    Reviewed on 1/23/2026

    Dr. Hughes was very patient with me. He ask did I had any concern about my health. He order any lab that was concerning me and my health. I told him thank you for being so kind to me.

    5 out of 5 stars
    Reviewed on 1/22/2026

    Attending nurse was excellent

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

    First Class!

    5 out of 5 stars
    Reviewed on 1/15/2026

    Dr Hughes is attentive, focused and practical

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

    Thank you. Dr. Hughes is very important to managing my difficult medical situation.

    5 out of 5 stars
    Reviewed on 1/13/2026

    I'm really thrilled to become a patient of Doctor Hughes. I will miss [staff], but I've worked with Doctor Hughes previously and I really appreciate the way he practices medicine.

    5 out of 5 stars
    Reviewed on 1/13/2026

    Dr. Hughes is the best most thorough and thoughtful GP I have had in 60 years

    5 out of 5 stars
    Reviewed on 1/13/2026

    Excellent

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

    Dr. Hughes is an exemplary physician whose dedication to patient outcomes is evident in everything he does. He possesses a remarkable 'bedside manner' that is matched only by his clinical diligence. He takes the necessary time to investigate medical concerns thoroughly and ensures that I am fully educated on my health and treatment options. His presence at this institution significantly elevates the quality of care provided here. He is, quite simply, an outstanding doctor.

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

    Dr Hughes is an excellent primary care physician. He listens carefully and thoroughly. He is up-to-date on what is hoih onon the Internet as well as in medical practice.

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

    I am very happy with my provider, Dr. John Hughes.

    5 out of 5 stars
    Reviewed on 1/8/2026

    Excellent, professional, great communication.

    5 out of 5 stars
    Reviewed on 1/8/2026

    THE ABSOLUTE BEST IN EVERY WAY!!!!!!!!!

    5 out of 5 stars
    Reviewed on 1/7/2026

    Dr John Zachary Hughes is first class I have every confidence in him.

    5 out of 5 stars
    Reviewed on 1/7/2026

    Dr Hughes

    5 out of 5 stars
    Reviewed on 1/6/2026

    Dr Hughes is superb.

    5 out of 5 stars
    Reviewed on 1/2/2026

    Outstanding

    5 out of 5 stars
    Reviewed on 1/2/2026

    Dr. Hughes is consistently prepared for our visit having reviewed my history and current forms that I completed prior to the appointment. He listens well and responds with knowledge and experience and data. He amazes me. I am delighted to be his patient.

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

    Dr. Hughes is excellent and I appreciate all his hard work

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

    Dr Hughes is an excellent doctor. He takes the time to read medical reports and make observations and suggestions. Also follows up with issues raised. Willing to reach out to other doctor to find answers.

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

    Alway concerned about my health and wellbeing

    5 out of 5 stars
    Reviewed on 12/29/2025

    Dr Hughes is thorough and listens carefully to my concerns. This was a muscle pain issue and he made sure to assess me thoroughly before prescribing medication.

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

    Very happy with my provider. Very caring, takes time to answer all my questions. I feel he truly cares about my health. I'm very happy with my provider.

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

    Excellent care.

    5 out of 5 stars
    Reviewed on 11/20/2025

    As always, Dr. Hughes was personable and professional. He asked pertinent questions about my health and wellbeing and gave me extremely helpful information to guide my choices for nutrition and workouts.

    5 out of 5 stars
    Reviewed on 11/18/2025

    Dr John Zachary Hughes the best Doctor I ever had and lm lucky

    5 out of 5 stars
    Reviewed on 11/17/2025

    Excellent on every level

    5 out of 5 stars
    Reviewed on 11/14/2025

    He is excellent and also caring

    5 out of 5 stars
    Reviewed on 11/14/2025

    Very knowledgeable and professional.

    5 out of 5 stars
    Reviewed on 11/13/2025

    Dr. Hughes is an excellent primary care physician. He is always prepared, discusses conditions I have and why I should do certain things, explains conditions that do not have definitive research and discusses my options, always treats me with respect, is extremely knowledgeable, and a pleasure to have as a doctor.

    5 out of 5 stars
    Reviewed on 11/12/2025

    Great Provider!

    5 out of 5 stars
    Reviewed on 11/10/2025

    Dr. Hughes is a great doctor and overall person. He's knowledge of different illnesses that affect different cultures!! When he talks his tone is calming, which helps you relax if you were nervous. He has no problem answering or asking questions so that the best plan for your health can come together.

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

    He ticks all of the boxes

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

    I've been going to Dr. Hughes for a number of years. Together we have traversed a significant physical transformation. Dr. Hughes continues to explore the possible cause and effect of this yet to be Identified harbinger. He is intuitive, insightful and understanding .

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

    Dr. Hughes is exceptional in every way. He is so knowledgeable, so compassionate, and so reassuring. I can't imagine a more attentive practitioner.

    5 out of 5 stars
    Reviewed on 10/30/2025

    Dr. Hughes has been my primary care doctor for about two years. I've found him to be both personable and professional. He excels at shared decision making and is a good listener. Especially because I have some chronic health conditions, it's reassuring to have a physician that knows my issues and always has a plan. I'm very grateful to Dr. Hughes for his excellent care. I don't know what I would do without him.

    5 out of 5 stars
    Reviewed on 10/30/2025

    The best ever, very thorough.

    5 out of 5 stars
    Reviewed on 10/29/2025

    Great Doctor and very knowledgeable about his work and great patience and mannerism.

    5 out of 5 stars
    Reviewed on 10/24/2025

    Dr Hughes is attentive to my concerns and appears to be genuinely interested in helping me maintain a healthy lifestyle as he addresses my age and social abilities. He is easy to communicate with and always pleasant.

    5 out of 5 stars
    Reviewed on 10/22/2025

    Dr. Hughes is an extremely talented, thorough and thoughtful physician. I feel very fortunate to have him as my doctor.

    5 out of 5 stars
    Reviewed on 10/20/2025

    Best provider and staffs .

    5 out of 5 stars
    Reviewed on 10/15/2025

    Hughes is a genius...We would follow him to the end of the moon!

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

    Dr Hughes is the best GP I have had; he takes the time to discuss issues and finds solutions to problems, suggesting follow-ups including with other providers.

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

    Dr Hughes is a great doctor. He explains things very carefully, thoroughly, and patiently. He also listens to patients' concerns and acknowledges them. I am so glad that he is my primary care doctor.

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

    Dr. Hughes is great. He is very professional while quite personable.

    5 out of 5 stars
    Reviewed on 10/9/2025

    Dr. John Zachary Hughes is one of the best Doctors at Sibley. He listens to your concerns and explains everything very clearly. I have full confidence in Dr. Hughes and I am lucky to have him as my general practitioner.

    5 out of 5 stars
    Reviewed on 10/6/2025

    He is the best doctor.

    5 out of 5 stars
    Reviewed on 10/6/2025

    Great care

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

    Dr Hughes is outstanding! He has made a huge impact in improving my health and wellbeing. He's very knowledgeable and solution oriented, and always cites research when explaining available options. Importantly, he's also very kind, caring, and thoughtful - excellent doctor.

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

    Excellent service, highly responsive to the needs of, respectful

    5 out of 5 stars
    Reviewed on 9/25/2025

    As a patient of Dr Hughes I feel extremely well cared for.

    5 out of 5 stars
    Reviewed on 9/24/2025

    Do everything you can to keep Dr. Hughes

    5 out of 5 stars
    Reviewed on 9/23/2025

    Very very knowledgeable, respectful passionate& great listener to my sickness.

    5 out of 5 stars
    Reviewed on 9/22/2025

    Dr. Hughes is great.

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

    Responsive, thorough, effective.

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

    Very thorough and caring

    5 out of 5 stars
    Reviewed on 9/11/2025

    Trust his judgment and always impresed with his knpwledge

    5 out of 5 stars
    Reviewed on 9/11/2025

    Very Good/Best

    5 out of 5 stars
    Reviewed on 9/11/2025

    Dr. Hughes

    5 out of 5 stars
    Reviewed on 9/10/2025

    Best supporting doctor that I have had in 20 years

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

    Very Good

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

    Terrific

    5 out of 5 stars
    Reviewed on 8/27/2025

    Hughes

    5 out of 5 stars
    Reviewed on 8/25/2025

    Superior

    5 out of 5 stars
    Reviewed on 8/19/2025

    I appreciate his attempts to communicate clearly and listen to me, even though I have difficulty speaking

    5 out of 5 stars
    Reviewed on 8/18/2025

    They are the best

    5 out of 5 stars
    Reviewed on 8/18/2025

    Understanding, respectful, knowledgeable

    5 out of 5 stars
    Reviewed on 8/14/2025

    Super nice, knowledgeable and understanding. Not judgmental. Seems very interested in my living a long life in good health.

    5 out of 5 stars
    Reviewed on 8/13/2025

    I really liked my visit with Dr. Hughes this week. I thought he took the time to talk me through me whole visit, and he also gave me a well-visit check-up while I was there, which was really convenient. I am glad he's my doctor and have recommended him to other friends as well.

    5 out of 5 stars
    Reviewed on 8/11/2025

    I can't say enough positive things about Dr. Hughes. He listens, he explains, he's friendly yet super professional. He's supportive. He knows my medical history very well. And he spends just as much time as needed. I feel totally as ease. He's the best!

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

    Excellent doctor, very caring, thorough, never seems rushed. Attentive to my needs.

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

    Excellent. Very thorough and thoughtful and easy to talk to

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

    Dr. John Hughes is the best and very helpful Doctor.I appreciate his advice and attention.

    5 out of 5 stars
    Reviewed on 7/31/2025

    Dr. Hughes is an excellent primary care physician. He's attentive, personable, knowledgeable, thoughtful, inquisitive, patient, etc. The supporting team is also great -- always friendly, positive, helpful. I feel lucky to have found the Sibley Primary Care group!

    5 out of 5 stars
    Reviewed on 7/31/2025

    Exceptional experience with this provider who goes the extra mile time and time again He is incredibly knowledgeable, sensitive, thoughtful, and communicative.

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

    Excellent

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

    Dr. Hughes is a Rock Star Physician. He is an exceptional health care provider. His holistic approach to my health has vastly improved health. He is current on the latest updates, improvements and changes in healthcare. His calm demeanor and warm personality creates an interactive experience for both the patient and Doctor. I would not want any other physician attending to my health.

    5 out of 5 stars
    Reviewed on 7/17/2025

    Dr. Hughes is an excellent doctor.

    5 out of 5 stars
    Reviewed on 7/17/2025

    Zach Hughes is everything one would ask for in a primary care physician

    5 out of 5 stars
    Reviewed on 7/14/2025

    Informative, helpful, and provided good advice as we weighed trade offs on a couple matters.

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

    Dr Hughes

    5 out of 5 stars
    Reviewed on 7/10/2025

    Excellent physician

    5 out of 5 stars
    Reviewed on 7/10/2025

    Dr. Hughes is one of the best doctors I have ever had. He is very smart yet explains things clearly in a way an ordinary person can understand, and he takes all concerns seriously and makes time to address them.

    5 out of 5 stars
    Reviewed on 7/3/2025

    Kindness knowledgeable

    5 out of 5 stars
    Reviewed on 7/3/2025

    This guy is AMAZING. He took all the time we needed to thoroughly review my health issues and left me with a plan for addressing the needed health adjustments! If every primary care provider followed Dr Hughes methods we all would know what we need to do to take care of ourselves.

    5 out of 5 stars
    Reviewed on 6/30/2025

    I am lucky to have Dr. John Zachary Hughes as my doctor. I trust his judgement and his understanding of my health problems. He truly is knowledgeable and caring. He is the best.

    5 out of 5 stars
    Reviewed on 6/30/2025

    Excellent manner. Very polite. Very impressive guy.

    5 out of 5 stars
    Reviewed on 6/26/2025

    The best! Kind, compassionate AND he listens!

    5 out of 5 stars
    Reviewed on 6/23/2025

    Excellent in knowledge, kindness, compassion

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

    Dr.John Z. Hughes, a excellent doctor.

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

    Dr Hughes has been one of the best things about our transition to DC almost five years ago. He is thorough, thoughtful, and listens very carefully. My session with him was like a joint problem-solving effort. He addressed spontaneously everything I was concerned about. I have a hard time imaging I could get any better care.

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

    Feel extremely confident with my doctor.Very attentive and great to have a doctor that will outlive me. Answered all of my concerns and I believe he will keep me healthy.

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

    Dr Hughes is lovely

    5 out of 5 stars
    Reviewed on 6/4/2025

    Dr. Hughes is great. Do whatever you have to do to keep him

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

    His communication skills are on point. He has taken the time to build a healthy rapport with me Consequently, I feel comfortable being right as well as wrong with my health concerns.

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

    Highly recommend his services to my family

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

    Excellent

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

    Dr. Hughes is a fine doctor, listens, has plenty of time, and and explains issues in an understandable way

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

    Dr. Z is the best! I recommended him to my adult daughter for her primary care and she is his patient, as well.

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

    As always, Dr. Hughes listened carefully and answered all my questions about diet, exercise, vaccinations and my A1C. He gave me very helpful information for bringing down my A1C, including weight training, walking after meals and losing weight.Dr. Hughes is friendly and personable, and I feel relaxed and comfortable talking with him. I would recommend him to anyone.

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

    Patience, good follow up on my conditions,Good humor.

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

    The best I've had at Hopkins

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

    Thank you for your assistance, care, and patience.