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Mary Lally Delaney

Mary Lally Delaney, MD

Endocrinology

Highlights

Languages

  • English

Gender

Female

Locations

  1. Mass General Brigham Endocrinology Clinic at South Weymouth

Expertise

Education

  • Fellowship: University Hospital, Endocrinology, Diabetes and Metabolism, 1992
  • Internship: University Hospital, Internal Medicine, 1989
  • Medical Education: Boston University, 1986

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 1991

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
  • Mass General Brigham Health Plan
  • MassHealth
  • MassHealth ACO
  • Medicare
  • Medicare ACO
  • Multiplan
  • Network Health
  • Railroad Medicare
  • Senior Whole Health
  • Tricare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense

Ratings & Reviews

4.9 out of 5

215 ratings, 112 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 3/4/2026

    Dr. Mary Lally Delaney has been my PCP for years. She is the best at what she does and she will be sorely missed by me and all of her patients. She takes time to speak and, more importantly, to listen to each patient, so when I find myself occasionally frustrated with having to wait to see her I try to remember that when she does see me she will be as attentive to me as she's been with prior patients. She is a true gem.

  • Reviewed on 3/2/2026

    Dr. DELANEY. IS ONE THE BEST DOCTOR, SHE IS EXTREMELY INFORMATIVE ABOUT ANY MEDICAL ISSUES I HAVE. TAKES TIME TO MAKE SURE YOU UNDERSTAND ALL MEDICATIONS AND ISSUES. I WISH MORE DOCTORS WERE LIKE HER. SHE LISTENS WHEN YOU HAVE CONCERNS YOU ARESO LUCKY TO HAVE DR DELANEY

  • Reviewed on 2/22/2026

    Love this provider She is very caring and takes the time to listen and explains everything [redacted]

  • Reviewed on 2/19/2026

    They do not make them like Dr. Delaney anymore. I am going to miss her! Thank you!

  • Reviewed on 2/16/2026

    Dr. Delaney is one of the most amazing doctors I have ever met in my life. She is caring. She is thorough. She explains things that make it clear. She wants to know that the patient is well informed for all their health concerns and preventative. I think she works so hard to make everyone at ease, including the staff and all the patients. Because of her, I've had a better life with my health because I knew what to look for, because she was very careful to explain from when I was younger until I was older. She had my mother, she took very

  • Reviewed on 2/13/2026

    Dr. Delaney is the absolute best Dr I have ever had! She is so compassionate, caring and it shows that she really cares about what you are telling her.

  • Reviewed on 2/11/2026

    Dr. Delaney is one of the best I've ever had. She explains things well and is very patient with answering questions. Definitely will be missed when she retires

  • Reviewed on 2/25/2026

    Dr Delaney is great. [redacted]

  • Reviewed on 2/9/2026

    Dr. Delaney was the best doctor I ever went to [redacted]. She was always great. She took time for you [redacted]

  • Reviewed on 2/8/2026

    Dr. Delaney is an excellent doctor [redacted]. She is the most thorough doctor I have ever encountered and seems to really care about her patients and their wellbeing. She really spends time with each patient to address their concerns and asks questions to make sure they are safe and doing the best for any medical problems. [redacted]

  • Reviewed on 2/4/2026

    Yes, my primary care provider was Dr. Mary Lowry Delaney. I think she's a wonderful, wonderful woman. I've been going to her for probably 30 years. [redacted] She's a wonderful, wonderful doctor, [redacted]

  • Reviewed on 2/2/2026

    Dr. Mary Delaney is a superb physician! She is a knowledgeable professional who cares deeply for her patients and their wellbeing.

  • Reviewed on 1/31/2026

    Dr. Delaney is one of the kindest and most caring doctors I have ever interacted with. She shows genuine concern, is happy to listen, and answer questions. I have never once felt rushed or that my questions were not valid.

  • Reviewed on 1/28/2026

    I am always treated with kindness and courtesy.

  • Reviewed on 1/28/2026

    Dr Delaney is excellent in every way. I appreciate her thoroughness, insight, help, and caring demeanor.

  • Reviewed on 1/28/2026

    Dr. Delaney is a great doctor. She is so thorough and always listens.

  • Reviewed on 1/21/2026

    I have been a patient of Dr Delaney for over 30 years, 'She is a great doctor & highly recommend her

  • Reviewed on 1/22/2026

    Dr. Delaney is excellent. She's always very thorough and it's worth the wait of seeing her because I know she's very busy. I'm sad to hear that she's retiring, but I'm happy for her and feel that my care will continue to be in good service with those in the office.

  • Reviewed on 1/22/2026

    Dr Mary Delaney is retiring at the end of this year. She has been my primary care doctor for 30 years. She has been compassionate, patient, and accurate in diagnosing a number of unusual-life threatening health problems that I have had. She never rushes, answers all questions thoroughly, and is remarkably skilled. They should name a wing of the hospital after her!

  • Reviewed on 1/20/2026

    Very focused on keeping me healthy

  • Reviewed on 1/7/2026

    Doctor Delaney is kind caring doctor. She talks with me going over any questions I may have or about my health. She never rushes

  • Reviewed on 1/4/2026

    I always receive the best care from my physician. The staff is always helpful and respectful.

  • Reviewed on 1/4/2026

    Dr. Delaney is a professional and she always conducts herself in this manner. Mary will be a big loss to the orginization when she retires.

  • Reviewed on 12/29/2025

    Dr Delaney is the best! I am sorry she will be retiring but very happy for her and wish her all the very best.

  • Reviewed on 12/29/2025

    Dr Mary Delaney is the best caring person /MD I have been to. I will miss her greatly when she retires. However, she deserves her retirement to be free and enjoy her family. Love her

  • Reviewed on 12/31/2025

    Dr Delaney is an attentive and professional physician. She always listens to my concerns and explains things in detail.

  • Reviewed on 12/24/2025

    Dr.Delaney dealt with diabetic issues but also with my feet and urine problems. Her focus was about other health issues.

  • Reviewed on 12/22/2025

    Sorry to see her retire. She is an excellent Doctor.

  • Reviewed on 12/20/2025

    Dr delaney has been a great addition to my medical team. She has always been straightforward and promp with responding to questions. [redacted]

  • Reviewed on 12/19/2025

    Dr. Delaney is the best. I'm so glad she's my endocrinologist. [redacted]

  • Reviewed on 12/17/2025

    Best doctor I have ever had. Smart, friendly, listens well and shows genuine interest in my health. Thorough in her work and extremely professional.

  • Reviewed on 12/15/2025

    Dr Delaney is an OUTSTANDING doctor She is amazing ~ spends whatever time is needed with patient. All doctors should be like Dr Delaney!

  • Reviewed on 12/12/2025

    To work for ever to help people like me

  • Reviewed on 12/9/2025

    Dr. Delaney is a wonderful doctor. She listens very carefully to what I have to say. She always gives me a very thorough check-up and always answers myquestions and explains everything to me so I can understand what she is doing.

  • Reviewed on 12/11/2025

    Dr Delaney is excellent and I highly recommend her

  • Reviewed on 12/5/2025

    Dr Delaney is a great doctor and very informative

  • Reviewed on 12/8/2025

    Best Doctor ever, She listens and is caring and very knowledgeable

  • Reviewed on 11/30/2025

    Dr. Delaney is a very competent and caring doctor.

  • Reviewed on 11/29/2025

    She is wonderful. A very caring individual. I gratefully appreciate the time she gives to me.

  • Reviewed on 12/1/2025

    Dr. Delaney is the most thorough, helpful, and expert provider I've ever encoungered in any specialty. She informes me system by system of her findings and concerns then listens to my thoughts and questions. I am going to miss her greatly. She's phenominal.

  • Reviewed on 11/27/2025

    Dr Delaney is the best. She is a great listener & so knowledgeable. She takes the time during your visit & makes you feel important ^ not rushed.

  • Reviewed on 11/20/2025

    Dr. Delaney is in a league of her own. Excellent!

  • Reviewed on 11/19/2025

    Dr. Delaney is an amazing doctor. I think she was late because she spends so much time with her patients. I will miss her so much when she retires.

  • Reviewed on 11/16/2025

    I have no complaints whatsoever regarding Dr Delaney are her staff. They've been tremendous each time I visited and I wish her the best of luck when she retires well deserved retirement.

  • Reviewed on 11/16/2025

    I was saddened when she told me she is retiring! She is a wonderful human being and others should follow by her example of making you feel like you are her only patient. I will miss her but wish her a very happy retirement and hope she makes many beautiful quilts!

  • Reviewed on 11/10/2025

    I have been a patient of Dr. Delaney for many years for osteoporosis/osteopenia. She has been instrumental in my treatment. She has listened to me and the care has been excellent. I am grateful for what she has done. [redacted]

  • Reviewed on 11/8/2025

    I am so lucky to have had a very caring, attentive and helpful doctor all these years.

  • Reviewed on 11/5/2025

    I received excellent care at your facility

  • Reviewed on 11/4/2025

    The physician is one of the most caring,professional, knowledgeable physicians I have ever seen!

  • Reviewed on 11/5/2025

    whatever good things i will say will be of no use as the provider is retiring. i just hope that the other providers in this office is as nice and good as her.

  • Reviewed on 10/27/2025

    [redacted] One the the best doctors I ever had. Always listen and never rushed.

  • Reviewed on 10/26/2025

    She is very thorough and thinks outside the box which makes you feel understood. It also makes you think you will be feeling better.

  • Reviewed on 10/25/2025

    She is wonderful, caring, attentive, and listens to you

  • Reviewed on 10/24/2025

    Dr. Delaney is very thorough and knowledgeable about all of my medical history not just my thyroid issues. [redacted]

  • Reviewed on 10/17/2025

    As always as Delaney is a caring well informed Dr.

  • Reviewed on 9/25/2025

    I love Dr Delaney! She is so thorough, kind and smart.

  • Reviewed on 9/25/2025

    Doctor Delaney has to be one of the best doctors that I know. She is professional, so smart and so kind. I've been lucky to have had her for the past 30 years.

  • Reviewed on 9/26/2025

    Dr. Delaney is an amazingly attentive and compassionate doctor. She takes her time to really get to know you and listen and really cares. She's phenomenal. [redacted] I wish we had more doctors like her.

  • Reviewed on 9/22/2025

    I absolutely cannot say enough good things about Dr. Delaney. She is absolutely one of the best Doctors I have ever met. She is attentive and compassionate. She also explains things in a way I can understand them. I would recommend her to anyone!

  • Reviewed on 9/14/2025

    Dr Delaney is professional, compassionate and a privilege for me to have her as my physician.

  • Reviewed on 9/13/2025

    Dr Delaney is the best doctor around so lucky to have her knowledge.

  • Reviewed on 9/13/2025

    DR.DELANEY IS AN EXCELLENT PROVIDER. SHE IS CARING, PROFESSIONAL, KNOWLEDGEABLE AND A CREDIT TO BRIGHAM HOSPITAL

  • Reviewed on 9/8/2025

    Dr Delaney is the best!

  • Reviewed on 9/5/2025

    Dr. Delaney has been my primary for many years. She is thorough, asks questions and listens, and she teaches her patients best practices for self-care. I feel very fortunate to have been in her care.

  • Reviewed on 9/5/2025

    In the 24 years I've been with her always wonderful.

  • Reviewed on 9/6/2025

    I've been going to Dr. Delaney for probably 20 years. She's the best there is. She's incredible. She's patient. She's smart. She's thorough. There is no other doctor as good as she is. Thank you.

  • Reviewed on 9/6/2025

    Dr. Delaney is an absolute delight. She speaks with me always with respect and listens very carefully to my concerns and what I say. She explains things very thoroughly when I ask questions. She explains things very quietly, but she knows what she's talking about. and she is able to relate them to me in a way that I understand. She cares about me as her patient, does her absolute best to take care of my issues that I deal with, and I have a lot of issues in the endocrine area. And I'm just very delighted that she is my doctor

  • Reviewed on 8/30/2025

    Dr Delaney has been my doctor for over 30 years. She is the best doctor I have ever had. [redacted]

  • Reviewed on 8/27/2025

    Shes very nice very though

  • Reviewed on 8/25/2025

    Dr Delaney is by far the best physician I've had. She pays attention to my medical history, listen attentively, offers professional expert guidance and overall provides a positive experience

  • Reviewed on 8/23/2025

    Dr Delaney is the best endocrinologist in this practice because she listens, she's extremely knowledgeable, is always prepared before she walks into the room with you and knows your health history as her patient. I waited a few years for this practice to open up her practice to take me as a patient. I was referred by other female friends to her with the comment from them, "as she's the best endocrinologist on the South Shore". I have never regretted waiting to be a patient in her practice. And I have received the greatest of care as Dr Delaneys patient.

  • Reviewed on 8/24/2025

    I always feel like Dr Delaney really care about me as a patient and I trust her medical opinion

  • Reviewed on 8/29/2025

    excellent

  • Reviewed on 8/21/2025

    Dr Delaney is always very knowledgeable and helpful whenever I have dealings with her.

  • Reviewed on 8/17/2025

    Dt. Delaney is a wonderful doctor [redacted].

  • Reviewed on 8/16/2025

    Dr. Delaney has been my physician for many years. I have always felt that she was up on all my health concerns. [redacted]

  • Reviewed on 8/15/2025

    Dr. Delaney is very easy to talk with. She covers everything.

  • Reviewed on 8/13/2025

    Dr Delaney is amazing. She takes her time and answers all of my questions. Extremely consistent over last 20 years.

  • Reviewed on 8/10/2025

    I think Dr. Delaney is very caring, kind, compassionate, not to mention brilliant. And I would recommend her to anyone, anyone I like, of course. I think she's great. And I didn't see a nurse, but I did see a medical assistant, and she was also very nice. Have a good day.

  • Reviewed on 8/7/2025

    Dr. Delaney always listens and answers all my questions. I never feel rushed. I have been seeing her for many years and it is always a pleasure!

  • Reviewed on 8/4/2025

    Well she were okay

  • Reviewed on 8/4/2025

    [redacted] Dr Delaney though, she was very thorough and new all my past medical situations and if she did not know she asked. She took quite a long time with me putting things together. It was the first time in a while leaving a Drs office feeling whole and not all anxious.

  • Reviewed on 8/1/2025

    Dr Mary Delaney is a caring doctor-she is my primary care doctor and she is very thorough with my care and questions

  • Reviewed on 7/31/2025

    Thorough, caring, knowledgeable,

  • Reviewed on 7/30/2025

    Always look forward to my visit with Dr Delaney - complete coverage for my needs. Never rushed. Listens and answers any concerns.

  • Reviewed on 7/26/2025

    Dr. Delaney has always been completely thorough of my care. [redacted] I so appreciate her caring and impeccable work she does.

  • Reviewed on 7/24/2025

    Dr. Delaney is always efficient and follows through with any questions I may have.

  • Reviewed on 7/23/2025

    [redacted] She has been my primary care physician and endocrinologist for years. Her professional service has been excellent. [redacted]

  • Reviewed on 7/12/2025

    I have seen Dr. Delaney for years- she is the best. She is engaging, knowledgeable, and thorough.

  • Reviewed on 7/7/2025

    Dr. Delaney has always been very efficient and absolutely takes the time to listen to me and requests tests that are necessary.

  • Reviewed on 7/7/2025

    Very thorough helpful with other issues beyond her endocrine specialty.

  • Reviewed on 7/5/2025

    Extremely thorough and knowledgeable and willing to educate me on all matters or concerns pertaining to my care.

  • Reviewed on 7/7/2025

    I have always felt comfortable with this doctor. She listens well, has a positive attitude --even when we might disagree!-- and cares about me as a whole person with ALL my various medical issues, not just endocrine-related issues.

  • Reviewed on 6/30/2025

    Dr. Delaney is an exceptional physician. She has tremendous knowledge of her chosen specialty. I am very pleased with her interaction with me.

  • Reviewed on 6/21/2025

    Dr. Delaney is the most thorough physician I have ever seen and she will spend as much time with you as necessary; I am lucky to have her as my primary care physician.

  • Reviewed on 6/18/2025

    [redacted] She is the BEST doctor EVER!! There is a new girl, [redacted], working at the Front Desk. She is such an asset to the office!! She is great!!

  • Reviewed on 6/16/2025

    The best physician She is knowledgeable and patient

  • Reviewed on 6/11/2025

    I have always had good experiences at Dr. Delaney's office starting at the front desk and all the way down to have blood test.

  • Reviewed on 6/11/2025

    Love Dr Mary Delaney

  • Reviewed on 6/10/2025

    Everything was perfect

  • Reviewed on 6/7/2025

    Dr.Mary Delaney is so caring and explains every thing perfectly .I like her she is so caring its perfect !!

  • Reviewed on 6/7/2025

    I have been going to Dr. Delaney for many years because she is a very caring doctor. She is very respectful, also answers all my questions, and treats me with respect.

  • Reviewed on 6/6/2025

    Mary Delaney is an awsome Dr

  • Reviewed on 5/24/2025

    Wonderful

  • Reviewed on 5/21/2025

    She's amazing and extremely thorough. She listened with my concerns and always follows through. She is one of my favorite and best providers.

  • Reviewed on 5/21/2025

    Dr. Delaney is the most competent, thorough, and helpful physician I've ever seen. She is the best doctor in any discipline to have cared for me. I respect her tremendously and look forward to seeing her.

  • Reviewed on 5/18/2025

    Dr Delaney is a MOST KNOWLEDGEABLE physician. She presents having read all information from my file, asks most pertinent questions and LISTENS!!! I am so lucky to be called her Patient.

  • Reviewed on 5/13/2025

    As always a pleasant experience

  • Reviewed on 5/13/2025

    I have had Dr Mary Delaney for many many many years. She is by far the best doctor I've ever seen. Patient, listens, asks lots of questions. She is the BEST

  • Reviewed on 5/7/2025

    Dr Delaney very professional and knowledgeable, and personable in her great manner of examination.

  • Reviewed on 5/7/2025

    I have been followed by this Dr for 30 years or so. Have always had an excellent experience. She is very kind and exceptionally thorough. Hope she never retires!!

  • Reviewed on 5/7/2025

    Great care!!!