Highlights
Age Groups Seen
- Adults
- Geriatrics
Languages
- English
Gender
FemaleLocations
- Mass General Brigham Cancer Institute Medical Oncology Clinic
- 789 Central Avenue, Dover, NH 03820
- Get Directions
- phone: 603-740-2139
- fax: 603-740-2446
- Mass General Brigham Cancer Institute Medical Oncology Clinic
- 121 Corporate Drive, Suite 200, Portsmouth, NH 03801
- Get Directions
- phone: 603-740-2139
- fax: 603-740-2446
Expertise
Education
- Fellowship: Baystate Medical Center, Hematology and Medical Oncology, 2018
- Residency: Baystate Medical Center/Tufts University School of Medicine, Internal Medicine Residency, 2015
- Medical Education: St. George's University School of Medicine, 2012
Board Certifications
- Medical Oncology: American Board of Internal Medicine, 2023
- Internal Medicine: American Board of Internal Medicine, 2019
Insurance
- Aetna
- AmeriHealth Caritas New Hampshire
- Beech Street
- Blue Cross Blue Shield
- Blue Cross Blue Shield - Federal
- Blue Cross Blue Shield ME
- Blue Cross Blue Shield Medicare
- Blue Cross Blue Shield NH
- Cigna
- Commonwealth Care Alliance
- Community Health Options
- CorVel Workers Comp
- Coventry
- Fallon Health
- Harvard Pilgrim Health Care
- Humana
- Maine Community Health Options
- Martin's Point
- Mass General Brigham Health Plan
- MassHealth
- Medicaid ME
- Medicaid NH
- Medicare
- Medicare - NH
- Medicare ACO
- Multiplan
- Multiplan/PHCS
- NH Healthy Families
- Prime Health Services
- Senior Whole Health
- TriCare
- Tufts Health Plan
- Tufts Medicare Preferred
- United Health Care
- WellCare
- Wellpoint
- WellSense
- WellSense NH
Ratings & Reviews
4.9 out of 5
113 ratings, 53 reviewsThe 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.
- Reviewed on 1/29/2026
Dr. Sliwa was very helpful to me and took the time needed and she made me feel reassured, which is important as a cancer survivor. Thank you.
- Reviewed on 1/28/2026
Positive, understanding interaction.
- Reviewed on 1/17/2026
Dr. Sliwa was fantastic. Very smart and a very good listener. She spent as much time as need to figure out my complicated Hx and was very receptive to my input about treatment options going forward. I would rate Dr. Sliwa and A++ on every aspect.
- Reviewed on 1/12/2026
Just love her. Have been with her for 4 years: from the beginning of chemo through today. Followed her from Newburyport to Portsmouth. Highly recommend her.
- Reviewed on 1/11/2026
Excellent in all areas
- Reviewed on 1/5/2026
Dr. Sliwa listened to my concerns and frustration with how I am feeling and we came up with plan that we both felt could be the plan for me.
- Reviewed on 12/23/2025
She reviewed my records, asked pertinent questions and listened intently to my answers. Her assessment was very logical and well thought out. I was very impressed with her knowledge and interactions with me as her patient. I would rate her very high as a provider!
- Reviewed on 12/21/2025
Dr. Sliwa always makes time to put us at ease answers all of our questions and keeps us involved. The whole family feels very comfortable with her and her staff. She has taken time to get to know us in our idiosyncrasies and we really appreciate the care we've gotten from her. We would highly recommend her to anyone and everyone.! She represents the hospital as a wonderful asset
- Reviewed on 12/21/2025
Excellent
- Reviewed on 12/14/2025
Dr Sliwa was very caring and compassionate. We lost our son 18 months ago, and she cares about how we are doing and listens. She knows all about my previous care and knew everything about my case without looking at notes or a computer. She is very professional but warm and approachable. I am thrilled to have her as my oncologist.
- Reviewed on 12/11/2025
Yes, I saw Dr. Sliwa for the first time. [redacted] I can say Dr. Sliwa was just absolutely wonderful, warm and caring, and it was a very nice transition for me. I have complete faith in her. [redacted] So I appreciate the visit, and I feel completely satisfied and very safe and secure having my health issues taken care of by Dr. Sliwa. So thank you for the follow-up, [redacted]
- Reviewed on 12/11/2025
Dr. Sliwa is an amazing oncologist and I've had a great experience going through oncology and cancer treatment with her. She's incredibly understanding and spends time and takes the time to listen to you thoroughly and is very compassionate and friendly. I can't say enough good things about her care.
- Reviewed on 12/8/2025
Wonderful, personable, professional visit.
- Reviewed on 12/7/2025
I'm a new patient & cancer survivor. Dr. Silwa was outstanding. I'm very comfortable with her and her judgement.
- Reviewed on 12/7/2025
Provided excellent information and always is available for questions.
- Reviewed on 12/6/2025
Dr Sliwa is great to work with. Very knowledgeable
- Reviewed on 11/21/2025
Dr. Sliwa was a pleasure to work with, she is very knowledgeable and thorough , very pleased with her
- Reviewed on 11/16/2025
It was a very informative and positive experience.
- Reviewed on 11/12/2025
Pleasure to be seen by her.
- Reviewed on 11/5/2025
She was thorough, kind and very approachable.
- Reviewed on 11/1/2025
Dr. Sliwa is by far the most competent, the most communitive and the most helpful medical professional I have ever encountered.
- Reviewed on 10/23/2025
Both the Doctor and the nurse were Super nice and they knew how I was feeling nervous and they made things so much easier to deal with.
- Reviewed on 10/15/2025
I couldn't have asked for a better doctor or experience for me. Dr Sliwa was amazing . She explained everything so clearly . She listen to all my concerns and answered all of our questions. [redacted] I couldn't be in better hands with my treatment.
- Reviewed on 10/9/2025
This was a new provider for me as the old one had moved away. I was apprehensive because I had become very connected with the old one. The new provider was wonderful and very easy to connect with again in the most positive way. I'm so glad she's here now.
- Reviewed on 10/8/2025
I thought the treatment that I got was absolutely fabulous. Everybody was there to take care of me. The receptionist was delightful and pleasant and welcoming and the nurse practitioner that I saw was informative and everybody deserves a pay raise in that office. They're just phenomenal.
- Reviewed on 9/29/2025
I thought she was thorough and very kind.
- Reviewed on 9/26/2025
All very good
- Reviewed on 9/25/2025
New doctor good personality makes you feel comfortable & wants to hear from you
- Reviewed on 9/17/2025
Professional and thorough
- Reviewed on 9/13/2025
She was excellent.
- Reviewed on 9/13/2025
friendly and very professional
- Reviewed on 8/24/2025
Excellent
- Reviewed on 8/27/2025
I think Dr. Sliwa is the best doctor I have seen in a long time [redacted]. I think Wentworth Douglas has the best doctors, and they're all wonderful, and Dr. Sliwa meets that expectation as well. I actually changed providers to come to Wentworth Douglas because of her. Thank you.
- Reviewed on 8/17/2025
New to me and very nice
- Reviewed on 8/19/2025
I found her very kind and very empathetic.
- Reviewed on 8/10/2025
She was excellent!---provided me with information I had not recieved before. She seemed very well informed with important information!
- Reviewed on 8/10/2025
Dr. Sliwa is a kind, empathetic, concerned and knowledgeable doctor. This was my first appointment with her and she definitely lowered my anxiety about next steps when she thoroughly explained what possible outcomes could be and how each outcome would be handled. [redacted]
- Reviewed on 7/28/2025
She is thorough, knowledgable, and very approachable with any concern I might have.
- Reviewed on 7/16/2025
First time meeting her and it was a very positive experience
- Reviewed on 7/16/2025
She explained everything so I could understand it.
- Reviewed on 7/16/2025
Easy to talk to. And very knowledgeable about my cancer. Like her very much.
- Reviewed on 7/5/2025
She is wonderful. I followed her from her previous employer because she was so good. She was part of a team that saved my life from Pancreatic Cancer.
- Reviewed on 6/23/2025
I felt she was sincere.
- Reviewed on 6/19/2025
Everything went well
- Reviewed on 6/15/2025
Dr. Sliwa was my first visit with an oncologist and it was a very,very good and positive experience. She was easy to talk with, explained all that I am about to encounter on this journey. She is a great listener and supportive in my desire for quality not quantity as the ultimate goal. You are very fortunate to have her on staff. I kinda wish I might have a long term relationship with her, but sadly that can't happen. I felt if the circumstances were different we might have become friends. I am delighted to have met Dr. Sliwa and she is well suited for her choice to specialize in oncology. She is a caring, compassionate, and interested in helping her patients work through the mine field ahead.
- Reviewed on 6/14/2025
Dr. Sliwa is terrific and your hospital is fortunate to have her
- Reviewed on 6/14/2025
Dr. Sliwa is personable and pleasant to talk with.
- Reviewed on 6/11/2025
Dr Sliwa was fantastic. I was pretty nervous about going to this appt and as soon as she walked in the room and started talking I was put at ease. She took a complicated medical history and worked it out the best she could for all of us to understand. Dr Sliwa made sure I'd be able to get the medication I needed through my insurance before I left the office. I appreciate the time she took with me. She's very kind.
- Reviewed on 6/11/2025
It was a very comfortable experience.
- Reviewed on 5/26/2025
Very thoughtful and caring.
- Reviewed on 5/24/2025
I appreciated Dr. Sliwa's kind manner and willingness to answer all my questions and concerns.
- Reviewed on 4/16/2025
I'm very happy with Dr. Sliwa. She answers all my questions and I'm just very happy with her.
- Reviewed on 4/2/2025
I met with Donielle Sliwa. It was an update since Dr. [redacted] has moved to a different state. I had no examination. I was told by Donielle, that she didn't need to do an exam on me due to my age and good health for many years. However, if I ever want to talk to her in the future, that is OK.