Ashley Schreier, DO, MS
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Areas of Expertise
Conditions I Treat
- Breast cancers and conditions
- HER2-positive breast cancer
- Triple-negative breast cancer (TNBC)
My Specialties
- Chemotherapy
- Targeted therapy
- Immunotherapy
Get to Know Me
I’m a board-certified medical oncologist who is an expert in caring for people with all types of breast cancer. I see patients at Memorial Sloan Kettering Cancer Center (MSK) Commack on Long Island.
When I meet with you, I aim to tailor care to your specific medical needs and personal values. The cancer care journey can be complex, and I believe in being a strong advocate for you at every step. I work to build trusting relationships with you and your family.
Just before I started medical school, I lost a family member to breast cancer. This motivated me to build a career in breast cancer care. I have always been passionate about the science and biology of cancer. At the same time, I recognize the impact a cancer diagnosis can have not only on the patient, but the entire family.
Besides seeing patients, I engage in research. Being a part of translational research allows me to bring the latest scientific discoveries to my patients. It also allows me to constantly challenge the standard of care.
I am studying new immunotherapies for breast cancer. These are treatments that use the body’s own immune system to fight cancer cells. I also focus on triple-negative breast cancer (TNBC) and have been expanding research for this specific type of invasive breast cancer.
Working on new research based on the needs of our patients has been an exciting part of my career.
I'm a breast medical oncologist, which is a cancer doctor who specializes in breast cancer.
- Assistant Attending Physician
Conditions I Treat
- Breast cancers and conditions
- HER2-positive breast cancer
- Triple-negative breast cancer (TNBC)
My Specialties
- Chemotherapy
- Targeted therapy
- Immunotherapy
- Antibody therapy
Education
- Bachelor of Science, Cornell University
- Master of Science, NYIT College of Osteopathic Medicine
- Doctor of Osteopathic Medicine, NYIT College of Osteopathic Medicine
Residencies
- Internal Medicine, Montefiore Medical Center/Albert Einstein College of Medicine
Fellowships
- Hematology & Medical Oncology, New York Presbyterian/Weill Cornell Medicine
Board Certifications
- Internal medicine
- Medical oncology
Awards and Honors
- Twisted Pink Metastatic Breast Cancer Impact Award (2024)
- Barry Mishkin Award for Humanity, Ethics, and Excellence in the Practice of Medicine, Montefiore Medical Center (2020)
- Outstanding House Officer in Ambulatory Care Medicine Award, Montefiore Dept of Medicine (2020)
- Glasgow Rubin Achievement Award, NYIT College of Osteopathic Medicine (2017)
- Gold Humanism Honor Society (2016)
Insurance Information
Understanding your insurance options is an important part of managing your cancer care. We have relationships with many common healthcare providers and plans.
In Network Coverage Type
HMO, EPO PPO, POS, Transplant
In Network Coverage Type
PPO
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO, PPO
In Network Coverage Type
HMO, EPO PPO, POS
In Network Coverage Type
Supplemental
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
POS, HMO
In Network Coverage Type
PPO, POS, EPO, HMO
Offers a qualified health plan from the Health Insurance Marketplace. Call Emblem to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, HMO
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO
This is a dual payer plan, which means 2 health insurance companies share this plan. MSK providers are out-of-network with UnitedHealthcare.
In Network Coverage Type
HMO, EPO
Offers a qualified health plan from the Health Insurance Marketplace. Call Fidelis to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO
In Network Coverage Type
PPO
In Network Coverage Type
EPO, HMO, PPO, POS
Offers a qualified health plan from the Health Insurance Marketplace. Call Healthfirst to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO, PPO
In Network Coverage Type
PPO EPO
In Network Coverage Type
HMO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
PPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
EPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
EPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
PPO, HMO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
State Government
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, POS, EPO
In Network Coverage Type
Federal Government
In Network Coverage Type
HMO (City Employee Health Plans Gold and Gold Care Only)
In Network Coverage Type
Supplemental
In Network Coverage Type
PPO/OAP
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
TBD
In Network Coverage Type
PPO, EPO
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
State Government
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, HMO
In Network Coverage Type
PPO, POS
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
State Government
Don't see your carrier or plan? We can help you understand your coverage.
If you don't have health insurance or are worried that your care may not be fully covered, our financial assistance programs may be able to help.
If you have questions about insurance, call us at 646-497-9176.
Make an Appointment
Contact and Location
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Colleagues
Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.
Clinical Trials
Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.
You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.
Search clinical trialsResearch and Publications
Schreier A, Zappasodi R, Serganova I, Brown KA, Demaria S, Andreopoulou E. Facts and Perspectives: Implications of tumor glycolysis on immunotherapy response in triple negative breast cancer. Front Oncol. 2023 Jan 10;12:1061789. doi: 10.3389/fonc.2022.1061789. PMID: 36703796; PMCID: PMC9872136.
Serganova I, Colombo G, Ballesio F, Kang JH, Karakousi T, Esposito TVF, Ackerstaff E, Santella A, Blasberg R, Pillarsetty NVK, Schreier A, Andreopoulou E, Demaria S, Lund AW, Gherardini PF, Zappasodi R. A tumor metabolism-angiogenesis-immune axis governs immunotherapy responses. bioRxiv [Preprint]. 2026 Feb 24:2026.02.23.707524. doi: 10.64898/2026.02.23.707524.
Schreier A, Munoz-Arcos L, Alvarez A, Sparano JA, Anampa JD. Racial disparities in neutrophil counts among patients with metastatic breast cancer during treatment with CDK4/6 inhibitors. Breast Cancer Res Treat. 2022 Jul;194(2):337-351. doi: 10.1007/s10549-022-06574-8. Epub 2022 May 28. PMID: 35633421.
Sha C, Liu M, Schreier A, Zappasodi R, Goldberg J, Zhi I. Efficacy of immunotherapy in older adults with triple-negative breast cancer: A systematic review. J Geriatr Oncol. 2026 Jul;17(6):103027. doi: 10.1016/j.jgo.2026.103027. Epub 2026 Jun 15. PMID: 42296569.
Visit PubMed for a full listing of Dr. Schreier’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.
See all on PubMedPatient Reviews
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