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Sonia Seng, MD

4.8 out of 5 (148 Ratings)


Cancer Care / Hematology and Oncology / Medical Oncology / Oncology

About Sonia Seng

Dr. Seng is the director of the Clinical Trials Program for cancer treatment through which local cancer patients will have access to new and developing treatments. Dr. Seng has extensive experience in clinical research focused on finding new chemotherapy treatments for cancer.

Sonia Seng, MD, earned her medical degree from Albany Medical College in Albany, N.Y., and completed a residency in internal medicine-pediatrics at Mount Sinai School of Medicine in New York. Dr. Seng also completed a fellowship in hematology and medical oncology at Mount Sinai.

A native of Nicaragua, Dr. Seng performed research on the availability of palliative care for patients with advanced cancers in Managua. She is fluent in Spanish.

Dr. Seng is board certified in internal medicine and a member of the American Society of Clinical Oncology and the American Association of Clinical Research.

Sonia speaks Spanish


Practicing at the following locations:

  1. Southcoast Physicians Group Cancer, Oncology & Hematology

    206 Mill Road
    Fairhaven, MA 02719

    P: 508-973-3000

    Get Directions 41.6536108 -70.88166089999999
  2. Southcoast Physicians Group Cancer, Oncology & Hematology

    506 Prospect St
    Fall River, MA 02720

    P: 508-973-7888

    Get Directions 41.7089735 -71.1457696

Insurances Accepted

Southcoast accepts most major insurance plans. Call the Southcoast patient registration department at 844-297-2952 or your health plan with any questions regarding coverage.

Provider Ratings

Rating Willingness to recommend provider’s office Overall Provider Experience Courtesy and Respect of Staff

Patient Comments (31)

At Southcoast Health, we strive to deliver exceptional patient care along with an exceptional patient experience. We appreciate all of your feedback and share your comments to recognize the wonderful care our teams provide to you as well as identify areas for improvement.

  • Dr [Name], Dr Seng and the staff at the Oncology center have been caring and supportive throughout my treatment.

  • Dr. Seng was amazing. Explains things clearly and concisely.

  • Staff was all great. Thank you.

  • Just listened to what I had to say and explained to me what was next step

  • Dr. listened carefully about my concerns and she addressed them with care

  • Dr. Sent has been a wonderful Doctor for me. Very caring , very thorough and she discovered my low thyroid problem that has been significant.

  • Dr. Seng is very professional, knowledgeable and caring. I greatly appreciate the time she took with me and her straightforwardness.

  • Decreasing the waiting time in the patient room.

  • Everyone was very nice and helpful, the doctors, nurses and staff are friendly and always take the time to answer any questions or concerns. It is a very welcoming environment.

  • Dr Seng is a wonderful Dr very caring

  • Dr. Seng was incredible!

  • Even though there was an emergency that delayed the entire office including labs and infusions everything was well communicated and moved along efficiently.

  • Confusing for out of town people are the various places/ addresses for treatment. I.e." Southcoast Physician Group." In what HOSPITAL. ?? I loved all Doctors, Nurses and Helpers I met and look forward to seeing some again later.

  • Not seen until nearly an hour after appt time

  • Dr. Sonia Seng is a top provider. She is very concerned about you as a patient and takes time to address concerns. The staff in the office and Laboratory are pleasant. The Check-Out desk needs additional staff. They're always very pleasant and accommodating but it is obvious they need help. Many patients are checking out together at the same time, and have just received treatment or spent time at other type of appointments and are feeling weak, and just need to leave. The staff are doing the best they can and are great, but a few extra employees would help relieve the pressure and move the flow of patients checking out.

  • They always listen and do their best with everything that I asked them!

  • I am always impressed with very professional people that are there taking care of me. They are kind and caring. I just cannot say enough about this staff over there. So thank you very much. Okay, bye.

  • I am very comfortable with the attention and detail with which my questions and concerns are addressed. The staff are pleasant to deal with, professional, and project a true and much appreciated sense of true care and responsiveness

  • I have nothing to say, I feel well pleased in all my treatments. Thanks for everything. God bless you.


  • Every staff member I encountered from the receptionist, to lab tech & everyone else in between was amazing. To watch how fantastic & personable they treated each patient was fantastic. They knew a lot of patients by name and were so respectful, attentive and really truly care about the health of there patients. Absolutely amazing team

  • Very kind staff and very helpful.

  • Appointment was 2 hours behind schedule. In the future if appointments are running this far behind it would be nice if they notified upcoming appointments of the delay so can make adjustments to the personal schedules. This was a huge inconvenience and effected my work schedule. On another note the physician was Amazing. She was polite, informative… all around great attitude.

  • Very friendly staff. The doctor was very kind and caring. Took time to explain everything

  • Dr Seng was wonderful.. she listened and came up with a plan. She is the first Doctor who didn't just say nothing is wrong.

  • I don't think you could you're all a bunch of professionals

  • Even though apt started a little late they spent the necessary time to talk to and explain things

  • Everything was done to my complete satisfaction. On a number scale, I never give a 10

  • Thorough and efficient visit

  • Prompt

  • Everyone is always pleasant and caring

View More Comments

Southcoast Health physician profiles now feature star ratings.  Below, you’ll find frequently asked questions about our process for calculating the ratings.

Why does Southcoast publish survey ratings online?
Southcoast is dedicated to providing patients and consumers with helpful information about the quality of our patients’ experiences. Star ratings published on our physician biography pages are based on actual responses from patients of that particular physician to patient satisfaction surveys that are distributed and processed by a national patient satisfaction survey vendor.

Who receives the survey?
Our vendor sends surveys via SMS or email to all patients seen in our outpatient physician practices who have a valid smart phone number or email address on file with Southcoast Health. Surveys are sent to patients within a few days of their appointment.

How is the Patient Satisfaction Star Rating Calculated?
Star ratings are calculated using an average of all survey responses to each of three questions: Courtesy and Respect of Staff, Provider Overall Rating, and  Willingness to Recommend Provider’s Office.  The star rating displayed on our physicians’ main biography page represents the average of the three measures for that particular physician.