Hanna K Gaggin, MD, MPH

Hanna K Gaggin, MD, MPH

Not currently accepting new patients

4.9375 average rating from 128 patient reviews

Specialties

Affiliation

Mass General Brigham

Provider Locations

  • Boston, MA

Dr. Gaggin is a cardiologist, clinical investigator and educator at Massachusetts General Hospital and Harvard Medical School.

Dr. Gaggin provides wide-ranging, general cardiac care as well as heart failure- and amyloidosis-focused care. She established the multi-disciplinary Amyloidosis Clinic at Massachusetts General Hospital and serves as a member of the Cardiovascular Medicine Section Leadership Council in the Cardiology Division.

She leads and participates in single and multi-center clinical trials on heart failure with a focus on heart failure with preserved ejection fraction and cardiac amyloidosis. She utilizes both traditional and novel research methods including machine learning and biomarkers.

Her educational efforts have focused on peer and trainee education. She is the Subspecialty Core Educator for the Internal Medicine residency at Massachusetts General Hospital and the co-editor of the 1st and 2nd edition of the MGH Cardiology Board Review book. In 2022, Dr. Gaggin was selected for the American College of Cardiology’s Emerging Faculty Leadership Academy.

Dr. Gaggin graduated from the Eastern Virginia Medical School in 2003, followed by Internal Medicine residency at the University of Virginia Health System, MPH at Harvard School of Public Health with a concentration in Quantitative Methods in 2007, clinical cardiology fellowship at the University of Pittsburgh Medical Center and clinical research fellowship at Massachusetts General Hospital. She joined the faculty at Massachusetts General Hospital and Harvard Medical School in 2012. In 2022, Dr. Gaggin was selected as one of the HeartShare inaugural fellows to focus on data sciences.

Education & Training

  • Fellowship: Massachusetts General Hospital, Cardiology, 2012
  • Fellowship: Massachusetts General Hospital, Research Fellowship, 2012
  • Fellowship: University of Pittsburgh Medical Center, Cardiovascular Disease, 2010
  • Residency: University of Virginia Health System, Internal Medicine, 2006
  • Medical Education: Eastern Virginia School of Medicine, 2003

Board Certifications

  • Internal Medicine, American Board of Internal Medicine
  • Cardiovascular Disease, American Board of Internal Medicine

Languages Spoken

  • Korean
  • English

Age Group Treated

  • Adults

Patient Feedback

4.9375 average rating from 128 reviews

  • After six years, Dr. Gaggin continues to provide excellent care.

    2026-08-05

  • Dr gaggin and staff were great--great discussion with Dr and staff--answered all questions and concerns

    2026-08-04

  • Thank you.

    2026-08-03

  • Very professional

    2026-08-03

  • She is the best

    2026-07-22

  • I've been seeing Dr. Gaggin for almost 10 years. She's been a fantastic caregiver and I trust her very much. She has helped me get well and prescribed medicines that were well explained and well tolerated. And she listens to my questions that not only affect my heart health but my whole health. I would recommend her 100% to anybody who wants the best care.

    2026-08-01

  • I feel very blessed to have Mass General as my hospital and most blessed to have Dr. Hanna Gaggin as my doctor who is taking care of me. Very blessed. I'm very fortunate to have her.

    2026-07-13

  • Everyone wasjust great thank you

    2026-07-10

  • Totally professional

    2026-07-08

  • Dr. Gaggin provides through and insightful information relevant to my specific cardiovascular needs.

    2026-07-08

  • Dr Gaggin is very client focused. Takes enough time to explain my condition and it's program to stay healthy.

    2026-07-06

  • The provider has provided care in as professional and caring way as possible.

    2026-06-24

  • I felt heard and valued when I met Dr Hanna K Gaggin for the first time last week. Her ability to listen and explain a rare disease to me gave me confidence that her knowledge and expertise will guide me and manage my disease. Looking forward to working with her. Thank so much.

    2026-06-04

  • Excellent care.

    2026-06-04

  • Very confident that my health care needs are being met

    2026-05-28

  • Exceptional service

    2026-05-25

  • Dr. Gaggin is an excellent physician; I trust her explicitly.

    2026-05-19

  • I saw this provider for a very serious diagnosis. My complicated diagnosis was explained so I fully understood the situation and what to expect moving forward.

    2026-05-10

  • Dr. Gaggin is an extraordinary Cardiologist who is professional, compassionate, and knowledgeable beyond usual standards. I have no question that I owe my longevity to her outstanding care. When I first began seeing Dr. Gaggin, my blood pressure was totally out of control and required repeated trips to the ER. She evaluated every aspect of my heart condition and quickly prescribed a combination of medications that brought my blood pressure and other medical indicators to within a healthy, normal range. I am so thankful that Dr. Gaggin is my Cardiologist.

    2026-05-08

  • She listens carefully to concerns. She is competent.

    2026-04-13

  • Great

    2026-03-29

  • She is EXCELLENT

    2026-03-23

  • Dr Gaggin was very professional and caring

    2026-03-16

  • 10/10

    2026-03-02

  • Brilliant and kind. Thoughtful and supportive.

    2026-03-02

  • My Doctor, Nurse Practitioner, Nurses and all the Medical staff are always a pleasure to visit with. I feel very well taken care of.

    2026-02-18

  • Dr Gaggin is an excellent cardiologist. She spent a lot of time with me and is very kind and caring. She is extremely knowledgeable and I would highly recommend her.

    2026-02-17

  • Dr. Gaggin is very professional and knowledgeable, thorough in her evaluation, and I'm lucky to have her as my cardiologist.

    2026-02-05

  • Outstanding

    2026-01-29

  • Dr. Gaggin and staff provided excellent care. I received a great deal of information and support that will enable me to manage my condition going forward. It.

    2026-01-18

  • I found her very professional. She informed me completely of my condition. She's a very, very good doctor.

    2026-01-15

  • My experience with Dr. Hanna Gaggin cannot be any better. She is a magnificent doctor. I couldn't be happier and I'm just blessed that she is my doctor.

    2026-01-15

  • She was kind and thoughtful and very thorough. She treated me like we are in a partnership regarding my health.

    2026-01-11

  • Dr. Gaggin is very knowledgeable about the procedure that I had and absolutely easy to talk to about my concerns, like helping me to calibrate my personal blood pressure at home device, my walking regimen and goals and checking my walking times and related blood pressure readings taken at time intervals after walking. She encourages me to continue my training program and when asked suggests activities that will help me in addition to walking and my water aerobics exercises. It is so nice to have someone as knowledgeable and caring as Dr. Gaggin.

    2025-12-25

  • Best possible total experience.

    2025-12-24

  • excellent doctor in every way.

    2025-12-12

  • They are all professional and kind to me.

    2025-12-08

  • It was a wonderful experience Dr. Gaggin is very knowledgeable comforting and concerned about my heart issue I look forward to my next appointment with her.

    2025-11-26

  • Dr. Gaggin's approach to my medical needs was well thought out and reflected her listening attentively to my situation. This was an excellent first visit.

    2025-11-26

  • The doctor was very professional. I guess I would recommend her to anyone that asked me. Thank you.

    2025-11-27

  • Very good experience

    2025-11-18

  • The Provider explained to me the problems I am having with my heart.

    2025-11-17

  • Dr. Gaggin is professional and thorough. Her friendly and caring approach made me feel I was in very capable hands.

    2025-11-12

  • Dr. Gaggin and Team were terrific in every aspect of my visit--Caring, informative, encouraging--All I could hope for--I'm not sure if I saw a nurse or not--I feel fortunate to have Dr. Gaggin as my provider--

    2025-11-12

  • Dr was very comforting and caring asking questions to amplify clarity in relationship

    2025-10-26

  • Very thorough and professional

    2025-10-22

  • Very professional, competent, and caring.

    2025-10-20

  • Superior care provider service

    2025-10-20

  • I am very happy to see my provider, because she take care of my health Very good.

    2025-10-19

  • She's excellent.

    2025-10-19

  • Professional, Knowledgeable and Patient Centric.

    2025-10-18

  • Hi, Dr. Gaggin was amazing. She told me a lot of important information. She knows my case in, out, backwards and sideways. We talked about other medical issues. She gave me some advice, good advice. And yeah, just a really great visit. She really knows what she's doing. She's ordered a bunch of tests. It's all good.

    2025-10-10

  • Excellent visit.

    2025-10-08

  • I feel save and secure with this hole team

    2025-09-30

Accepted Insurance

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