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William T Lester

William T Lester, MD

Internal Medicine

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

About William T Lester

Dr. Lester received his MD degree from The University of Texas Medical School at Houston after earning his master's degree in Electrical and Biomedical Engineering at The University of Texas at Austin and his bachelors in electrical engineering from The Ohio State University.

Dr. Lester trained in internal medicine at Massachusetts General Hospital and completed a fellowship in medical informatics in the combined Harvard University/MIT HST Program. As a member of the Harvard Medical School Faculty, he currently teaches, performs research, and sees patients in both primary and urgent care.

Dr. Lester also serves as Assistant Director of MGH's biomedical informatics fellowship training program where his work has focused on building the tools to provide patients with the safest and highest quality care.

Locations

  1. Massachusetts General Internal Medicine Associates

Expertise

Education

  • Fellowship: Massachusetts General Hospital, Medicine, 2003
  • Residency: Massachusetts General Hospital, Medicine, 2000
  • Medical Education: University of Texas Medical School-Houston, 1997

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2000

Insurance

Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Humana
  • Maine Community Health Options
  • Mass General Brigham Health Plan
  • MassHealth
  • MassHealth ACO
  • Medicaid ME
  • Medicaid NH
  • Medicaid RI
  • Medicaid VT
  • Medicare
  • Multiplan
  • Railroad Medicare
  • TriCare
  • Tufts Health Plan
  • United Health Care
  • Wellpoint
  • WellSense
  • WellSense NH

Ratings & Reviews

5 out of 5

131 ratings, 67 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

How likely would you be to recommend this provider to your family and friends?
Search reviews
  • Reviewed on 4/2/2026

    Dr. Lester is the best physician I have seen in the last 30 years. He is friendly, asks appropriate questions, considers my answers wisely, and counsels me thoroughly. He answered all of my questions during the visit and I look forward to seeing him again in the future.

  • Reviewed on 3/30/2026

    My dr. William Lester is a great dr. I have had dr. Lester for many years. He is the best!!

  • Reviewed on 3/30/2026

    Dr. Lester is thoughtful, passionate but respectful, patient with this patient, thorough and motivated to pursue the best solutions for me. I'm greatful for his care.

  • Reviewed on 3/25/2026

    Dr. Lester is very thorough and takes time to explain different aspects of health. For example, on this visit, we discussed A1c, and what research shows regarding elevated A1c and different risks. Just one example of many discussions we've had.

  • Reviewed on 3/23/2026

    Dr. Lester has been my primary care physician for many years and has always provided excellent care in a compassionate manner.

  • Reviewed on 3/18/2026

    Dr. Lester is fabulous. What a gift to his patients, the field of medicine, MGB, and the world!

  • Reviewed on 3/16/2026

    Excellent, as usual. Dr. Lester truly cares about the welfare of his patients.

  • Reviewed on 3/10/2026

    Dr. Lester is my Primary care doctor. I have been his patient for a very long time. I am fortunate to have him for he really cares about my health and me as his patient. Dr. Lester is a very knowledgeable and professional doctor. I am delighted with the primary care team which consist of Nurses also. The Nurses are very supportive, professional, knowledgeable and there when I need them.

  • Reviewed on 3/10/2026

    Dr. Lester leaves no stone unturned. He is very thorough and explained things in a way that is easy to understand.

  • Reviewed on 3/5/2026

    Dr. Lester is a model PCP - th best!

  • Reviewed on 2/19/2026

    Knowledgable, helpful, and efficient. If I ever needed to find a new internist, I would be more than happy to have a doctor like Dr. Lester.

  • Reviewed on 2/17/2026

    Such a comfortable and informative visit.

  • Reviewed on 2/26/2026

    As always, Dr. William Lester is an exceptionally talented physician. He is thorough, listens carefully and answers in a detailed and informed manner, and always explains things I have questions about in an easy to understand way. He is without question the finest primary care doctor I have ever had in my [redacted] years of adulthood.

  • Reviewed on 1/30/2026

    Dr Lester and I have a longstanding PCP-patient relationship and I am confident in the care I receive from him. He listens carefully to what it is I want to discuss during my annual visit and is well-informed about my options at the time of the visit. For example, this time, I requested a sleep study for OSA and he immediately made the referral. Although I am not ready for a GLP prescription, we had robust discussion of what and why may be best for me, if I decided to take that road toward weight loss. My care is efficient and more than satisfactory.

  • Reviewed on 1/30/2026

    Dr. Lester was very knowledgeable and very helpful. Thank you.

  • Reviewed on 1/29/2026

    Dr Lester is a phenomenal doctor. He listened carefully. He passed on information with kindness and empathy and understanding. I am grateful to have Dr Lester as my doctors I can't imagine a better doctor.

  • Reviewed on 1/28/2026

    Dr Lester is very patient listening and observing for issues and symptoms, educating me on what he sees and what it means to me, and then prescribing immediate follow up action

  • Reviewed on 1/21/2026

    Dr Lester has been my PCP for many years. Enough said.

  • Reviewed on 1/14/2026

    I cannot imagine that there is a better Doctor than Dr Lester

  • Reviewed on 12/28/2025

    Dr. William T. Lester is the best. He always listens to me. He always gives me good feedback. He explains everything to me. And this last visit he explained that generally after age 70, men do not get a PSA test. However, my family history is of great longevity. [redacted] So he said that he would continue to test me for my PSA.

  • Reviewed on 12/19/2025

    Dr. Lester is an amazing doctor. I wish there was more doctors out there like him. He takes the time, he listens to you, and if he doesn't know an answer, he'll find an answer. He's 100%, 110% the best doctor I've ever had. He just makes you feel welcome. He really looks at your chart and looks over. You're not just a number, you're actually a person. And like I said, you guys, I wish you had more doctors out there like him because he is a gem and his staff is just as great. They always get back to me when I have an issue. He is the best doctor out there. Thank you.

  • Reviewed on 12/16/2025

    He listens to every word and gives time to discuss any issues. I could not ask for more from him.

  • Reviewed on 12/16/2025

    So thankful to have a super gifted primary care provider.

  • Reviewed on 12/11/2025

    Dr. Lester is an extremely caring, capable PCP. He has been my primary care doctor for over a decade. I am extremely fortunate to have him..it's too bad he can't be cloned.

  • Reviewed on 12/11/2025

    Dr. Lester is a very good pcp.

  • Reviewed on 12/11/2025

    Dr. William Lester is a superb physician, and MGH is fortunate to have him on staff. He is thorough, caring, and responsive to all my medical questions in a very timely manner. He has helped me through many dire illnesses, and I am truly appreciative of his excellent care. [redacted]

  • Reviewed on 11/28/2025

    Dr. Lester listened to me carefully and had very good ways of illustrating what he meant, of giving me ideas about what my condition meant and how to deal with it. So thank you very much. Bye.

  • Reviewed on 11/27/2025

    excellent service

  • Reviewed on 11/14/2025

    Dr Lester represents the best of what a physician should be. He listens carefully, asks appropriate questions, explains his thinking, and offers alternatives, where appropriate.

  • Reviewed on 11/12/2025

    Dr Lester is a wonderful, warm, caring and intelligent man.

  • Reviewed on 11/7/2025

    Dr. Lester has been my doctor for, I think, over 15 years and he's the best doctor I ever had, always responsive and fantastic to me and very knowledgeable and caring about everything in his treatment.

  • Reviewed on 11/7/2025

    He cares about his patients. We need PCP who are like that.

  • Reviewed on 10/29/2025

    Provider and all support staff provide outstanding care.

  • Reviewed on 10/23/2025

    Dr. Lester is amazing and takes care of me the way anyone would want their mother taken care of. He is a fantastic doctor. I can't say enough good about him.

  • Reviewed on 10/16/2025

    Dr. Lester is a fantastic doctor. He know and cares about my health. I am lucky to have him take care of me.

  • Reviewed on 10/15/2025

    Dr. Lester has been my PCP for 25 years. He is an outstanding physician. I feel that he cares very much about my health and me as a person. He is very easy to speak with and always explains his recommendations clearly.

  • Reviewed on 10/17/2025

    Doctor Lester is a dedicated professional who cares about his patients. He carefully listens to all the concerns I have and he asks the proper medical questions to arrive to a good diagnostic. I'm very happy I found him 20 years ago to be my PCP.

  • Reviewed on 10/15/2025

    Dr Lester is a blessing

  • Reviewed on 10/14/2025

    Dr. Lester is an exceptional physician. I feel blessed to have him as my PCP. Not only does he listen to me carefully and answer every question I ask in a clear and detailed manner, but he also makes suggestions and offers advice that is helpful. It is clear that Dr. Lester loves what he does and truly cares about his patients.

  • Reviewed on 10/2/2025

    Provided detailed and understandable information concerning my health.

  • Reviewed on 9/24/2025

    Dr. Lester has been an excellent partner in my health care over the years. He is thorough and deeply concerned about any issue we have ever discussed. It's an honor to have him as my PCP.

  • Reviewed on 9/10/2025

    Dr. Lester is a conscientious and caring primary care physician. I never feel rushed or unable to ask questions. Dr Lester always responds to questions and concerns. I'm happy and lucky to have been his patient for almost 20 years!

  • Reviewed on 9/10/2025

    I am concerned that primary care doctors are becoming less and less available at the MGH.

  • Reviewed on 9/10/2025

    Dr. Lester is a caring, intelligent, personable and everything good that can be said about a wonderful physician. He has written me such long letters that I am embarrassed that he would take so much time doing so. I always look forward to reading his very helpful and informative notes. A great physician and IMA is lucky to have him !

  • Reviewed on 8/7/2025

    Dr Lester has been my PCP for many years. He is always personable and professional.

  • Reviewed on 7/31/2025

    I think Dr. William Lester is a fabulous doctor. I feel very lucky to be in his care, and I'm very grateful. And I think that we need more doctors like him. He's very helpful to me in understanding what specialists say and getting me the best internal medicine care I can hope for. I'm very grateful. Thank you.

  • Reviewed on 7/25/2025

    Dr. Lester has always taken the time to listen. He's also extremely detailed, thorough and explains everything clearly.

  • Reviewed on 7/22/2025

    Excellent, kind and concerned about my wellbeing

  • Reviewed on 7/18/2025

    The nurse took my vitals and measurements, and we went over my medications. But we didn't discuss my care, so not sure the Nurses part of this survey should have been filled out completely.

  • Reviewed on 7/11/2025

    I have the best Doctor and nurse on the planet. Patients come first and they strive to provide excellent care that I can understand. They are also data driven and quickly get to solving any health issues. I'm really blessed to have such great care from Dr. Lester. He's an amazing Doctor and wonderful person. No one has better care than me!!

  • Reviewed on 7/11/2025

    Dr. Lester is great.

  • Reviewed on 7/7/2025

    Dr. Bill Lester is a top tier primary care physician. I consider myself very fortunate to have someone like Bill looking after my health issues/needs.

  • Reviewed on 7/7/2025

    He is the most caring and professional provider I have ever seen.

  • Reviewed on 7/4/2025

    Dr. Lester is a great PCP. Always knowledgeable and patient in addressing all my concerns.

  • Reviewed on 7/3/2025

    I have been treated by Dr. Lester for many years and value my relationship with him.

  • Reviewed on 7/2/2025

    He has the ability to explain treatments and conditions with complete ease and accuracy.

  • Reviewed on 7/2/2025

    He is amazing.

  • Reviewed on 6/30/2025

    Excellent doctor, excellent person and totally committed to exceptional patient care.

  • Reviewed on 6/23/2025

    Excellent physician! Dr. Lester is the best!

  • Reviewed on 6/19/2025

    Dr Lester has been my doctor for almost 20 years. He is exemplary in all that he does. He is thorough, gives clear explanations and is compassionate. I highly recommend him

  • Reviewed on 6/13/2025

    Dr. Lester is an amazing doctor who listens closely to patients and has their best care in mind. His follow up is tremendous. I feel really grateful and blessed to have such a caring and empathetic doctor.

  • Reviewed on 6/15/2025

    very kind and very knowledgeable and helped me out a lot.

  • Reviewed on 6/11/2025

    Bill is amazing

  • Reviewed on 6/5/2025

    I consider myself to be very lucky to have such a knowledgeable, experienced and attentive primary care physician.

  • Reviewed on 6/5/2025

    He's the best primary care doctor I have ever had

  • Reviewed on 6/4/2025

    Nothing. He and his team have been great

  • Reviewed on 5/14/2025

    Very through