Jessica R Allegretti, MD, MPH

Jessica R Allegretti, MD, MPH

Not currently accepting new patients

4.910112 average rating from 89 patient reviews

Specialties

Affiliation

Mass General Brigham

Provider Locations

  • Chestnut Hill, MA

Dr. Jessica Allegretti currently serves as the Medical Director of the Crohn’s and Colitis Center at the Brigham and Women’s Hospital. In addition, she developed and leads the hospital’s Fecal Microbiota Transplantation Program and has grown to become and international expert on the topic. Dr. Allegretti cares for patients with inflammatory bowel disease as well as Clostridioides difficile (c.diff) infection. Her research focuses on the intestinal microbiome and the consequences of its derangement, with the goal of understanding the role dysbiosis plays in microbial associated diseases. In addition, her lab focuses on novel therapeutic agents for IBD and she is leading multiple sponsored and investigator initiated drug trials.

Education & Training

  • Fellowship: Brigham and Women's Hospital, Gastroenterology (Internal Medicine), 2015
  • Residency: Massachusetts General Hospital, Internal Medicine, 2012
  • Medical Education: University of Miami School of Medicine, 2009

Board Certifications

  • Gastroenterology, American Board of Internal Medicine

Languages Spoken

  • Spanish
  • English

Age Group Treated

  • Adults

Patient Feedback

4.910112 average rating from 89 reviews

  • Great communicator, professional and personable.

    2026-08-17

  • Dr Allegretti is knowledgeable , compassionate and easy to talk to,

    2026-08-11

  • Extremely professional and on point. Went into listen mode if I started talking or asking a question. Regarded as subject matter expert in the field. Made it clear I was to contact her directly via Messages Patient Gateway if I had any questions or concerns. Recommended Return to Clinic in 8 weeks. Her office called the next day to schedule it. What's not to like?

    2026-08-08

  • Amazing care!!!!

    2026-08-01

  • Attentive and punctual

    2026-07-29

  • Doctor Allegretti is amazing doctor and always gives me best medical plan to help me with Crohn's!

    2026-07-20

  • Dr Allegreti is the consummate professional. She is clear in her communication, listens well, and is an expert practitioner.

    2026-07-18

  • I could not have had a more positive experience than I had with Dr. Allegretti. So very courteous, respectful, professional, and knowledgeable. So very impressed that Dr. Allegretti took the time to fully understand my prior medical history and asked all the right questions to understand my current status. I feel so very blessed to have Dr. Allegretti as my care provider.

    2026-06-22

  • Always efficient, knowledgeable and pleasant.

    2026-06-20

  • It took a while to get an initial appointment, but I am so glad I waited - this is the best I've felt about a patient/doctor relationship in years.

    2026-06-15

  • I have had nothing but the best experience with this provider. I come Rhode Island because of her

    2026-04-29

  • Provider is good. [redacted]

    2026-04-27

  • Dr.Allegretti is a wonderful doctor. She is easy to speak with and I feel comfortable with her caring for my health.

    2026-04-27

  • Dr. Allegretti is a true professional, taking the time to hear me and listen to me. She has a caring a compassionate way about her and after each encounter I come away informed, enlightened and comforted. I met her 10 years ago when seaking a second option and I truly believe her treatment plan saved me.

    2026-04-26

  • Dr. Allegretti is kind compassionate and knowledgeable. I love having her as my GI doctor.

    2026-04-04

  • Dr. Alegretti was fantastic.

    2026-03-23

  • Dr. Allegretti, she's very thorough. She always gives me the time. She listens. She really listens really well. And if she doesn't have an answer, she will find it out for me. I would definitely recommend this provider. She's a great, great doctor. Thank you.

    2026-03-19

  • Dr. Allegretti otherwise known as Dr. A++ Is the best, period!

    2026-03-16

  • Dr. Allegretti explained in detail the causes of my recent surgery. She answered all my questions. [redacted]

    2026-03-15

  • Dr Allegretti was very nice, knowledgeable, confident and caring. She spelled out the plan for next steps in my care.

    2026-03-14

  • Dr Allegretti is fantastic!

    2026-03-13

  • She is great

    2026-03-08

  • Very good

    2026-03-02

  • She is very good and very kind.

    2026-03-01

  • Harvard needs to promote Dr. Allegretti to the rank of professor.

    2026-02-23

  • She is a fantastic doctor and I feel very well cared for by her.

    2026-02-07

  • I love Dr. A! She is flexible and listens to what I have going on and together we come up with a plan.

    2026-02-06

  • I am a long time patient of Dr Allegretti, and she is, in a word, FANTASTIC! the end!

    2026-02-02

  • Have been seeing this provider for many years and am very happy with the care I am receiving

    2026-01-21

  • It would be a good idea to have a Zoom meeting just the patient and the doctor. There were two other doctors in the room and they were talking and it was very tough at times to hear what my provider had to say.

    2026-01-19

  • Dr. Allegretti always makes me feel comfortable and I trust her completely.

    2026-01-14

  • Dr. Allegretti is one of the best doctors I've ever had. There are many things that make her such a fantastic doctor, but in particular, two things stand out to me. First, she's a really incredible communicator. I remember the first appointment I had, she took out a piece of paper and drew on it to explain sort of the structure of the colon and everything. She's super clear every time we talk about my health. And second, she is always hyper aware of the other areas of my health. She's honestly better than my primary care provider at keeping track of my holistic health and all my various conditions. So cannot recommend her enough. She's an amazing doctor.

    2026-01-10

  • She just returned from maternity leave, so wasn't aware of my most recent abscess that was treated through her office. It wasn't mentioned in my visit summary

    2025-12-29

  • Dr. Allegretti is amazing and she saved my life.

    2025-12-25

  • Best provider I've ever had

    2025-12-20

  • Visit was perfect!

    2025-12-11

Accepted Insurance

  • Tufts Medicare Preferred
  • Wellpoint
  • Cigna
  • Blue Cross Blue Shield
  • MassHealth
  • Medicare
  • Medicaid ME
  • Medicare ACO
  • Tufts Health Plan
  • Humana
  • Railroad Medicare
  • Commonwealth Care Alliance
  • Harvard Pilgrim Health Care
  • Mass General Brigham Health Plan
  • Senior Whole Health
  • Aetna
  • Beech Street
  • Medicaid NH
  • Medicaid CT
  • United Health Care
  • Fallon Health
  • Blue Cross Blue Shield Medicare
  • Multiplan
  • WellSense
  • TriCare
  • Coventry