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Nestor A Sainz Rueda

Nestor A Sainz Rueda, MD

Internal Medicine

Highlights

Age Groups Seen

  • Pediatrics
  • Teenagers
  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Massachusetts General Internal Medicine Associates

Expertise

Education

  • Residency: Family Medicine Larkin South Miami, Family Medicine, 2023
  • Fellowship: Faculdade de Medicina de Ribeirão Preto (FMRP-USP), Critical Care, 2004
  • Fellowship: Faculdade de Medicina de Ribeirão Preto (FMRP-USP), Cardiology, 2003
  • Residency: Faculdade de Medicina de Ribeirao Preto (FMRP-USP), Internal Medicine, 2001
  • Medical Education: Hospital das Clinicas da Faculdade de Medicina de Ribeirao Preto, 1999

Board Certifications

  • Family Medicine: American Board of Family Medicine, 2023

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 CT
  • Medicaid NH
  • Medicaid RI
  • Medicare
  • Multiplan
  • Senior Whole Health
  • Tricare
  • Tufts Health Plan
  • United Health Care
  • Wellpoint
  • WellSense

Ratings & Reviews

4.7 out of 5

251 ratings, 65 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 4/9/2026

    Seemed very nice [redacted]

  • Reviewed on 4/5/2026

    He was very kind, wanted to get to know me and answered all of my questions.

  • Reviewed on 4/4/2026

    Excellent service overall Thanks

  • Reviewed on 4/1/2026

    Totally impressed with his knowledge about my medical issues.

  • Reviewed on 4/3/2026

    Very professional.

  • Reviewed on 3/28/2026

    Definitely showed concern for my well-being

  • Reviewed on 3/27/2026

    My experience with Dr. Sainz Rueda was excellent. First of all, the receptionist was just very cooperative in trying to make the visit work smoothly. I shown up there a bit early. The nurse was outstanding, really, in terms of checking blood pressure, coming back and checking it. And Dr. Rueda was just wonderful. I mean, he knew my record, knew the issues, listened to me, put me through, you know, the appropriate tests. So yeah, I thought it was an excellent experience, as I've had for many years at Internal Medicine at MGH. Okay, thank you.

  • Reviewed on 3/23/2026

    A very positive experience! Dr. Rueda made me feel very comfortable and was an excellent listener.

  • Reviewed on 3/22/2026

    this visit addressed all my concerns. it was an outstandingly well done visit and I say that as a physician. prompt effective and sympathetic medical care

  • Reviewed on 3/19/2026

    Doctor Nestor took plenty of time to understand my concerns about my shoulder. He did an evaluation and sent me for an XR to be followed up by an MRI if there were no broken bones. He was very thorough and explained to me all the options I would have for further treatment.

  • Reviewed on 3/18/2026

    I am very satisfied

  • Reviewed on 3/18/2026

    My primary care doctor was not available but I was seen by another doctor who was thorough. He set me up for an MRI which I had the following day. I went in on Saturday for the MRI and and got the results back today. I was very pleased with the treatment I received and it was done in a timely manner

  • Reviewed on 3/17/2026

    I feel this doctor completely reviewed my medications. He pointed out a medication that I had been on for several years with good results and we decided to go back on. So far so good.

  • Reviewed on 3/20/2026

    I want to thank Boston General Hospital. I'm very happy, very satisfied. I think he's one of the best doctors I've had at the hospital because he's paid attention to me, ordered tests, and is concerned about my health, which is the most important thing, that a doctor is attentive to their patient's health. That makes me very happy. It's the first time a doctor at PCP has been so attentive to my health, which isn't good. I congratulate them because they have a great staff, including Dr. Nestor Fuega. He's an excellent doctor, and I'm very grateful. And there are other doctors I'm very, very grateful to, like the therapists and psychiatrists; they've helped me a lot too. And everyone in general.

  • Reviewed on 3/13/2026

    I was very impressed with my care. He was very responsive and did a thorough exam. I would recommend him to anybody. Thank you.

  • Reviewed on 3/13/2026

    Dr. Nestor was a new doctor to me [redacted]. He listened very well to me and I really appreciate how much he really cares about what I do and how I do it. And I just give him well respected and I'm thinking he's a great guy too as well. Thanks.

  • Reviewed on 3/11/2026

    Very good, blood test and EKG were quickly and efficiently arranged for immediately afterwards.

  • Reviewed on 3/4/2026

    Great experience.

  • Reviewed on 3/12/2026

    Provider was polite, thorough, ordered needed xrays. He had my file open so he knew what medications I take, was aware of allergies. [redacted]

  • Reviewed on 2/26/2026

    Excellent

  • Reviewed on 2/25/2026

    I was extremely satisfied with my care and the doctor

  • Reviewed on 2/24/2026

    I am dazzled by IMA 605's efficiency, thoughtfulness and care. I sent a patient gateway message indicating I had had pain in my left hip (which had been replaced in 2019) for over 3 weeks, asking what I should do next. Though it wasn't an emergency, I got a response from an IMA 605 nurse within an hour telling me to make an appointment that day. When I called the lovely admin who answered offered me several appointments that very day. Amazing and appreciated. When I arrived early, they moved my appointment up so I saw Dr. NESTOR A SAINZ RUEDA early. He was fantastic! He asked thoughtful questions about my pain, the history etc then gave me a thorough examination after which he explained his Dx and answered my questions...told me what meds to use, authorized PT, and advised that I get an XRay to be sure the replacement hardware wasn't involved in the pain. And if all that wasn't enough....he followed up by sending me a letter detailing what he had found, assured me that the XRay showed no signs of concern, and repeating the instructions for care so I had them in front of me and didn't have to rely on memory. Bravo!! I have been following his instructions over the past 72 hrs and am pleased the pain in lessening. I am extremely grateful for his care and will tell him how terrific the IMA 605 office staff is.

  • Reviewed on 2/25/2026

    Exam addressed the main issue

  • Reviewed on 2/20/2026

    Yes, this is the first time that I saw this doctor as he replaced the primary care physician that we had before that. And I thought it was a very well done session and he was easy to talk to. And so everything turned out okay. Thank you very much.

  • Reviewed on 2/13/2026

    I am very impressed that my PCP's receptionist could get me an appointment on such short notice with this great doctor in a different practice group and a CT Scan In such short notice! Thank you!

  • Reviewed on 2/4/2026

    He was very kind and respectful. His advice was very clear and he was very patient.

  • Reviewed on 2/4/2026

    This doctor gave me an excellent evaluation for my condition. He seemed very professional and bright, testing my hand grip strength, shoulder and back strength all areas that pertained to my cervical strain. He was treating me holistically from what I could tell. He knew about my health history and prescribed medications based on my current physical state. He offered me Physical Therapy which was so necessary due to my compromised neck injury. He was a serious doctor with seemingly good expertise. I felt as though I had a thorough evaluation and I appreciated the urgent appointment given.

  • Reviewed on 2/4/2026

    He was excellent. It was my first time meeting him as my doctor. I had left last year and I was given him as my new PCP. I was very happy and comfortable with him. He was very attentive, listened to everything that I had to say and try to find a solution. So I was very, very much happy with the service that I was provided.

  • Reviewed on 1/27/2026

    Dr Sainz-Rueda is caring, and always attends to my medical questions/ conditions. He is an amazing Dr!

  • Reviewed on 1/17/2026

    This is a new primary care physician for me. [redacted] Dr. nestor was very nice and thorough. He didn't spend as long with me as Dr. [redacted] used to, but I assume it was because he had to spend a good portion of the time allotted to me to review my file, which it was very clear he had done. He helped me get referrals for an MRI that I need and a gynecologist. I really appreciate that. I also like that he was so punctual. [redacted] I really appreciate Dr. Nestor's careful concern for me at this appointment.

  • Reviewed on 1/16/2026

    Dr. Rueda was great. He stepped in when my general practitioner was unavailable and he was extremely thorough and we discussed all kinds of different ailments and he made the right referrals for me and when I got feedback from the specialist, I have to see now that we know what the issue is, he obviously agreed with all of the outcome.

  • Reviewed on 1/20/2026

    This was my first visit to Dr. Rueda. He was asssigned to me (and me to him) after my own long-time PCP retired. Dr, Rueda was very nice and professional but it will take some time to get use to a new PCP.

  • Reviewed on 1/16/2026

    My first visit .. Very pleased . Thorough and attentive. plenty of time. Special effort to arrange needed tests same day

  • Reviewed on 1/14/2026

    I thought Dr. Nestor, as he liked to be called, was excellent. He listened to me. I think we had a good connection. I really appreciated his follow-up letter. I have to respond to that. He obviously listened to what I had to say and responded accordingly. And I was very impressed. So thank you very much.

  • Reviewed on 1/10/2026

    [redacted] I am delighted with Dr Rueda. As a physician I think he is careful, complete, responsible, and wise and I would highly recommend him to others. [redacted]

  • Reviewed on 1/7/2026

    Dr. Saw me on a timely basis was not late as some physicians have been.

  • Reviewed on 1/5/2026

    Good 'bedside manner', listened well, asked follow up questions, answered mine, very kind. Did not mention that sample from wound would be sent for culture, so I sent my follow up questions before I received his follow up letter with culture results. If I was aware that culture was being done, I would have just waited a bit longer. Not a big deal, just minor communication issue.

  • Reviewed on 1/4/2026

    Excellent manner

  • Reviewed on 1/4/2026

    Yes, I found Dr. Nestor to be very competent, friendly, and listened to me. And to be honest, I was a little surprised. He's such a good doctor. I'd never met him, but he was referred to me by a nurse, [redacted] That's all I have to say for right now.

  • Reviewed on 1/1/2026

    It's always a pleasure and Dr. Rueda is very professional. He's very careful. He's very attentive. He always knows everything before. He knows everything that was going on between me and other doctors. His recommendations are on top. He is excellent. I would recommend him to anybody. I would say this out loud to anyone that ever contacts me. Thank you again. And I wish you a happy new year, happy holidays to all of you. Bye-bye. Thank you.

  • Reviewed on 12/24/2025

    It's a very good feeling to know that you're in the hands of a caring, kind, and hopefully, and I feel he is, and very experienced, excellent physician. The nurses, I've known many for years going to Mass General for a long time, are the best money can buy. Let me put it to you that way. Very experienced, wonderful girls. That's all. Happy Merry Christmas and a happy, healthy New Year all.

  • Reviewed on 12/22/2025

    When I first met Dr. Nestor,I was taken off guard when he did a cognitive,and separate strength test,as I did not expect that at all!! However,the follow up from him & his staff,was phenomenal!! Also,when Dr. Nestor sent me a letter outlining & explaining my blood work,and cognitive and strength test in detail,everything all made sense. His expertise,knowledge,and explanation of what all the separate blood tests,cognitive & strength test was superb. As well as his postive comments about my diet,& swimming,exercise program. [redacted] I am grateful,& truely blessed to have Dr. Nestor as my Primary Care Physician. Dr. Nestor has my back covered,and I have the utmost confidence in all medical & life style decisions that he suggests to me. Sincerely, [redacted]

  • Reviewed on 12/17/2025

    I get excellent care. Everyone was professional and I was treated respectfully.

  • Reviewed on 12/16/2025

    Still on medicines and cough hasn't gone away. The doctor did do the X-rays for my concerns which I appreciated very much and everything was negative

  • Reviewed on 12/16/2025

    It was nice meeting with the doctor for the first time I felt comfortable and relaxed with my experience with him. Look forward to more visits.

  • Reviewed on 12/19/2025

    Hi, this provider wrote a report very quickly the same night that the x-rays were done and the blood was drawn and gave me a very thorough explanation of the findings. He recommended some stretches to help with my headaches and they are definitely helping. So that was great. And he also scheduled some MRIs that I think will give us a clearer picture about what additional steps we can take to completely eliminate the headaches in the future. So yeah, thank you very much. Dr. and [redacted] did a great job.

  • Reviewed on 12/15/2025

    Productive visit

  • Reviewed on 12/7/2025

    I met Dr. Nestor for the first time. I was very impressed. He had obviously read my file in detail. He seems a perfect fit for me in every way.

  • Reviewed on 12/8/2025

    Grateful they took the time to see when i needed it.

  • Reviewed on 12/7/2025

    He brushed off what I had to say. He stubbornly repeated the points he wanted to make. He rushed me out of the office.

  • Reviewed on 12/3/2025

    He spoke so softly I couldn't hear him [redacted]

  • Reviewed on 11/27/2025

    What a kind, informed and smart doctor. I've never been welcomed so well, inviting me to tell him ab myself so he could remember me. Gave me excellent care and guidelines to recover, including appropriate meds that did not interact w meds I am taking. He is great!

  • Reviewed on 11/27/2025

    Dr. Sainz Rueda was clearly well prepared, knowledgeable, thorough, patient, kind, respectful, while also being warm and friendly. I would be happy to be assigned to see him again at any time in the future if my PCP Dr. [redacted] is not available.

  • Reviewed on 11/26/2025

    Dr. Rueda is a thoughtful kind physician. He is meticulous in his treatment of patients.

  • Reviewed on 11/23/2025

    Caring--

  • Reviewed on 11/23/2025

    Wrote a two page follow up letter and sent to me the same day. Very informative. Ordered many more blood tests that my previous primary care physicians had ever ordered. Very thorough

  • Reviewed on 11/22/2025

    Dr Nestor Sainz Rueda was so thorough and attentive. I felt quite secure in his knowledge and professionalism. I was also very impressed with how thorough his after office visit clinical note. I felt heard and taken care of.

  • Reviewed on 11/21/2025

    This is [redacted]. Nestor was fine. I've seen him once before. He is the backup physician for my primary care, Dr. [redacted]. Absolutely fine. Thank you.

  • Reviewed on 11/20/2025

    Dr, Sainz-Rueda is very efficient in my my care.

  • Reviewed on 11/19/2025

    Excellant care. [redacted]

  • Reviewed on 11/14/2025

    I had a very positive experience with Dr. Nestor. He had never met me before, but he had spent 45 minutes looking through my records, which were recent records, which were very complex, and explained everything very, very well to me and my son. I appreciated his help and thought that he was very efficient, very kind, and very knowledgeable. And I appreciated being seen by him.

  • Reviewed on 11/12/2025

    The doctor was professional and friendly. Listened to my concerns and acted upon them.

  • Reviewed on 11/15/2025

    Professional... thorough ... caring

  • Reviewed on 11/11/2025

    My exposure to this provider was very brief and was only to have a culture sample taken. Nevertheless, the experience was excellent and the provider was friendly, professional and knowledgeable.

  • Reviewed on 11/10/2025

    Everything ok except I asked a question via email about my test results and no one has gotten back to me yet. Two days ago.