William T Lester, MD
Not currently accepting new patients
4.932026 average rating from 153 patient reviews
Specialties
Affiliation
Mass General Brigham
Provider Locations
- Boston, MA
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.
Education & Training
- 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
Languages Spoken
- English
Age Group Treated
- Adults
Patient Feedback
4.932026 average rating from 153 reviews
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Dr Lester is the best in the business. I'm lucky to have him.
2026-07-08
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Bill Lester is a fantastic doctor. He listens well, provides clear explanations and advice, and is delightful to be with.
2026-07-08
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You should figure out how to clone Dr. Lester. He listens carefully, is super knowledgeable, quite personable, and not the least bit judgmental. I don't know anyone in my community - not one other person - that can say all that about their PCP. Usually I hear that people settle for a trade-off. Knowledgeable, but not personable, or personable but not exceptionably knowledgeable. I count myself blessed not to have to settle for any form of a trade-off. Thank you.
2026-07-07
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Very informative visit
2026-06-30
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Dr Lester is a fantastic physician. I am very fortunate to be seeing him. I always look forward to his thoughtful advice.
2026-07-01
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Best PCP I've ever had!
2026-06-30
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Takes the time to engage with me holistically and is extremely supportive.
2026-06-24
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Dr. Lester is an excellent care provider.
2026-06-19
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Dr Lester is a wonderful, respectful and very knowledgeable doctor. He's great about getting back to his patients in a timely manner with a clear explanation.
2026-06-17
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Dr. Lester always listens to my concerns and gives input that reflects that. His input is always given in a way that makes you want to make the changes he's suggesting. He gives a good "pep talk" and makes you believe you can make necessary changes.
2026-06-17
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Very professional, knowledgeable and courteous.
2026-06-11
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Very happy with Dr Lester
2026-06-08
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That he is personable, knowledgeable and every thing else one would expect from a professional care provider. I truly believe that he genuinely cares that I am at my healthiest! He is a care provider that I want to see and confer with.
2026-06-04
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Wonderful in every respect!
2026-05-28
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Dr. Lester is very thorough and seeks answers to all of my questions and health issues. I trust him completely and highly recommend him.
2026-05-27
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Dr Lester is amazing.
2026-05-21
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Excellent
2026-05-18
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I feel very fortunate to have health care at mgh ima. Dr Lester is great
2026-05-13
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Dr. Lester is an amazing doctor. I am living a much more healthier life. He not only makes sure I am healthy today, but had long term plan to keep me healthy over the next 10 to 20 years.
2026-05-13
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Great Doctor Really cares about his patients
2026-05-11
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Dr. Lester is always very professional and very on time and I feel like he takes care of me very well.
2026-05-08
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Dr. Lester is an amazing Primary Care Doctor who listens and continually learns and even though it seems impossible somehow is always improving over the twenty four years that he has been taking good care of me.
2026-05-06
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Dr Lester is a knowledgeable, personable, caring and informed physician. He is attentive and listens well and meaningfully translates what hears and recommends. He creates incredible rapport. I see our doctor-patient relationship as a team and I trust him with my health. I am very grateful.
2026-04-29
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Excellent experience, shows genuine interest and concern. Very knowledgeable and helpful.
2026-04-22
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Dr. Lester is careful and listens to everything I say. He explains diagnostic and therapeutic options with great clarity. A star!!
2026-04-21
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I/we feel blessed to have thoughful, insighful and exceptional Dr Lester and his team as our PCP. Thanks for providing us the opportunity to share our terrific family experiences over the years.
2026-04-16
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Dr. Lester is thorough, takes the time to explain complex medical issues, and offers reasonable suggestions. He truly cares about his patients and improving their well-being.
2026-04-16
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Dr Lester is a gift to MGH Brigham Hospital. You are lucky to have him. He is the best pcp a patient can have.
2026-04-15
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Dr Lester is outstanding!
2026-04-08
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Five stars
2026-04-08
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Dr Lester is an awesome doctor. Great practitioner, clinician, and excellent personality in dealing with me and my healthcare plan. Listens closely to my questions and concerns and follows-up later if necessary. I am both fortunate and blessed to have Dr Lester as my primary care physician and MGB IMA staff to support my healthcare and wellbeing.
2026-04-09
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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.
2026-04-02
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My dr. William Lester is a great dr. I have had dr. Lester for many years. He is the best!!
2026-03-30
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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.
2026-03-30
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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.
2026-03-25
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Dr. Lester has been my primary care physician for many years and has always provided excellent care in a compassionate manner.
2026-03-23
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Dr. Lester is fabulous. What a gift to his patients, the field of medicine, MGB, and the world!
2026-03-18
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Excellent, as usual. Dr. Lester truly cares about the welfare of his patients.
2026-03-16
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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.
2026-03-10
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Dr. Lester leaves no stone unturned. He is very thorough and explained things in a way that is easy to understand.
2026-03-10
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Dr. Lester is a model PCP - th best!
2026-03-05
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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.
2026-02-19
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Such a comfortable and informative visit.
2026-02-17
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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.
2026-02-26
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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.
2026-01-30
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Dr. Lester was very knowledgeable and very helpful. Thank you.
2026-01-30
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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.
2026-01-29
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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
2026-01-28
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Dr Lester has been my PCP for many years. Enough said.
2026-01-21
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I cannot imagine that there is a better Doctor than Dr Lester
2026-01-14
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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.
2025-12-28
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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.
2025-12-19
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He listens to every word and gives time to discuss any issues. I could not ask for more from him.
2025-12-16
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So thankful to have a super gifted primary care provider.
2025-12-16
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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.
2025-12-11
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Dr. Lester is a very good pcp.
2025-12-11
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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]
2025-12-11
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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.
2025-11-28
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excellent service
2025-11-27
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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.
2025-11-14
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Dr Lester is a wonderful, warm, caring and intelligent man.
2025-11-12
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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.
2025-11-07
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He cares about his patients. We need PCP who are like that.
2025-11-07
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Provider and all support staff provide outstanding care.
2025-10-29
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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.
2025-10-23
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Dr. Lester is a fantastic doctor. He know and cares about my health. I am lucky to have him take care of me.
2025-10-16
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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.
2025-10-15
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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.
2025-10-17
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Dr Lester is a blessing
2025-10-15
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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.
2025-10-14
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Provided detailed and understandable information concerning my health.
2025-10-02
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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.
2025-09-24
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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!
2025-09-10
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I am concerned that primary care doctors are becoming less and less available at the MGH.
2025-09-10
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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 !
2025-09-10
Accepted Insurance
- MassHealth ACO
- Wellpoint
- Medicaid VT
- WellSense NH
- Medicaid ME
- Tufts Health Plan
- Humana
- Coventry
- Cigna
- Multiplan
- Beech Street
- Aetna
- Mass General Brigham Health Plan
- TriCare
- United Health Care
- Harvard Pilgrim Health Care
- Commonwealth Care Alliance
- Medicare
- MassHealth
- WellSense
- Fallon Health
- Medicaid RI
- Railroad Medicare
- Medicaid NH
- Blue Cross Blue Shield Medicare
- Maine Community Health Options
- Blue Cross Blue Shield