Andrew D. Seidman, MD
Attending Physician, Breast Medicine Service
New Patient Appointments
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Dr. Seidman accepts the following list of insurance providers. Select your insurance provider to see more details.
Memorial Sloan Kettering is an in-network provider with Aetna HMO, POS, and PPO plans. Aetna does not include us in any of the plans you can purchase through the insurance exchanges or through Medicare. Please ask your insurance if you need a one-time referral. MSK has an agreement with the Aetna Transplant Program for all Aetna's commercial products.
Memorial Sloan Kettering is a designated Blue Distinction Center for bone marrow transplant and CAR-T.
We understand that there may be many complexities involved with insurance coverage purchased through the health exchange network of the Affordable Care Act. We’re here to help. If you have questions about how your care will be covered by an insurance provider, or need help navigating a change in coverage, please call us at 646-227-3378; if you are not a resident of New York, you can call us at 866-248-1274. Our team is here to listen to your concerns and assist you in any way we can. We want our care to be as accessible and affordable for as many people as possible.
Memorial Sloan Kettering is an in-network provider with CIGNA's HMO, POS, and PPO plans. CIGNA does not include us in any of the plans you can buy through the insurance exchanges.
- If you are a New York State resident: Please ask your insurance if you need a one-time referral.
- If you live outside of New York State: Please ask your insurance if you have in-network access to Memorial Sloan Kettering.
Memorial Sloan Kettering is an in-network provider with EmblemHealth’s PPO, EPO, POS, HMO plans. EmblemHealth includes GHI, HIP, Vytra, and ConnecticCare (in NYS Only). You must bring a referral from your Emblem primary care doctor to your first appointment. In-network participation exceptions include:
- Emblem’s HIP Commercial Millennium, Select Care and Enhanced Care Prime networks is not in-network with Memorial Sloan Kettering.
- Please call Emblem to confirm if your specific plan is in-network.
For information regarding Memorial Sloan Kettering’s participation with Emblem’s Medicare Advantage Plans, please refer to the Medicare & Medicaid page
Memorial Sloan Kettering is an in-network provider with Empire Blue Cross Blue Shield (Wellpoint) of New York Indemnity, HMO, EPO, PPO, POS and Medicare Advantage plans, with the following exceptions:
- Empire Blue Cross Blue Shield does not include us in any of the plans you can buy through the insurance exchanges.
- Please call Empire BCBS to confirm if your specific plan is in-network with Memorial Sloan Kettering.
Memorial Sloan Kettering is an in-network provider with HealthFirst’s commercial products; these commercial products are not purchased on the insurance exchanges.
Memorial Sloan Kettering is an in-network provider with HealthSmart’s Accel, HSPC, and HPO networks.
For our NJ locations, Memorial Sloan Kettering is an in-network provider with most Horizon Blue Cross Blue Shield of New Jersey plans for individuals, families, and small businesses. Horizon members with Blue Card Access (there would be a suitcase logo on the front of the card) may have access to our NY locations. Please call Horizon to confirm if your plan is in-network in NY.
Memorial Sloan Kettering is a designated Center of Excellence by Humana.
Memorial Sloan Kettering is a designated Center of Excellence by Interlink Health Services.
Memorial Sloan Kettering is a designated Center of Excellence by Lifetrac.
Memorial Sloan Kettering is an in-network provider for all MagnaCare health plans except those products you can buy through the insurance exchanges.
For information about Medicare and Medicaid, please visit this page
Memorial Sloan Kettering is an in-network provider with some Multiplan/Beech Street/PHCS plans. Contact your insurance carrier to find out if your plan provides in-network access to Memorial Sloan Kettering.
Memorial Sloan Kettering is a designated Center of Excellence by Multiplan.
If you are covered by more than one insurance plan, you will want to determine your benefits from both plans. First, you need to determine which one is your primary insurance provider by contacting your employee benefits office or your insurance carriers. After you find out which is your primary insurance provider, you should then contact your insurance carrier to determine if you have access to Memorial Sloan Kettering.
Memorial Sloan Kettering is an in-network provider with some MVP plans. Contact your insurance carrier to find out if your plan provides in-network access to Memorial Sloan Kettering.
Memorial Sloan Kettering is an in-network provider for New York State employees who have enrolled in UnitedHealthcare's Cancer Resource Services. If you have the Empire Plan, you should call Cancer Resources Services at 866-936-6002 to verify and enroll in this coverage.
Memorial Sloan Kettering is in-network with Oscar’s Circle Plus Network, a part of its Small Group Broad line that is offered only to select small business groups. Oscar does not include Memorial Sloan Kettering as an in-network provider for any of its individual plans. Please confirm eligibility with your insurance carrier.
Most Blue Cross Blue Shield plans include Memorial Sloan Kettering as an in-network provider. Contact your insurance company to confirm if Memorial Sloan Kettering is in-network.
We have agreements with several insurance companies that may provide additional coverage for cancer patients. These benefit programs include:
- AXA Assistance USA
- Beech Street
- Integrated Health Plans
- National Health Administrators
- National Preferred Provider Network
- UnitedHealthcare's Cancer Resource Services
- United Resource Network
- Veterans Choice Program
Memorial Sloan Kettering is an in-network provider with Oxford’s Freedom and Liberty plans as well as the Metro Plan (which is only offered to small business groups and no longer offered as individual plans). Please confirm with your insurance if you need a one-time referral. Note: Oxford’s Medicare Managed Care plan — Secure Horizon — does not include Memorial Sloan Kettering as an in-network provider. Oxford does not include us in any of the plans you can buy through the insurance exchanges.
Memorial Sloan Kettering is an in-network provider with the World Trade Center Health Program.
Memorial Sloan Kettering is an in-network provider with QualCare's PPO and HMO/POS network.
Memorial Sloan Kettering is a designated Center of Excellence by Specialty Care Management.
Hospital and physician services may be covered by TRICARE. Please call your TRICARE plan to confirm coverage at Memorial Sloan Kettering.
Memorial Sloan Kettering is an in-network provider with UnitedHealthCare's HMO, POS, and PPO plans. Please confirm with your insurance if a one-time referral is needed.
UnitedHealthCare's Medicare Managed Care plan does not include Memorial Sloan Kettering as an in-network provider.
United does not include us in any of the plans you can buy through the insurance exchanges.
Memorial Sloan Kettering is a designated Center of Excellence by UnitedHealthcare.
Contact and Location
Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offer many services, including screening, chemotherapy, and medical testing.
MD, Hahnemann University School of Medicine
Internal Medicine - Pennsylvania Hospital
Medical Oncology/Hematology - Memorial Sloan Kettering Cancer Center
Internal Medicine; Medical Oncology
I am an experienced medical oncologist who has spent three decades caring for people with breast cancer. I specialize in treating all subtypes and stages of breast cancer, from the earliest to the most advanced stages of the disease. I have special expertise in the understanding and treatment of breast cancer that has metastasized (spread) to the brain, a condition that has historically been managed primarily by radiation oncologists and neurosurgeons.
I typically see more than 1,000 patients each year, both remotely and in person. The pandemic has taught us that we can treat patients’ disease and improve well-being both ways, but I much prefer to see patients in person.
Patients and their loved ones are naturally concerned about how breast cancer will affect their survival and quality of life. The large amount of information available on the internet often leads people to feel overwhelmed and confused. My goal is to provide them with expert, evidence-based guidance in terms of diagnosis, prognosis, and treatment, along with humane and compassionate care. I trust that this, along with the tremendously skilled team that works with me, reassures patients and leaves them feeling hopeful, optimistic, realistic, and secure in the knowledge that they are in capable and caring hands here at Memorial Sloan Kettering Cancer Center (MSK).
For me, oncology, more than any other specialty, demands a deep understanding of physiology, genetics/genomics, and humanity — and represents a great unmet need. Meaningful and rewarding patient experiences during my residency in internal medicine, an early exposure to outpatient medical oncology practice, and strong role models were important factors in my decision to become an oncologist.
Outcomes for people with breast cancer have steadily improved over the past 30 years, thanks to a tremendous increase in the understanding of underlying biology that has informed advances in surgical, medical, and radiation treatment. As the last chemotherapy drug for breast cancer was introduced well over a decade ago, there has been a shift away from conventional toxic chemotherapy to targeted therapies, which generally have fewer side effects. It has been exciting for me to be a part of this movement by designing and leading phase 1, 2, and 3 clinical trials.
My research has focused on studying new chemotherapeutic agents and targeted drugs for the treatment of metastatic breast cancer. Over the past decade, I have worked to identify better medical therapies to improve outcomes for people with breast cancer metastasis to the brain. I continue to lead and engage in interdisciplinary research in this area with my colleagues at MSK and beyond. These ongoing efforts will likely lead to changes in the way patients are treated in coming years.
Overall, I subscribe to a “work hard, play hard” philosophy! In my spare time, I enjoy biking, hiking, skiing, gardening, baking, and reading. I recently organized a book club that meets every three months, which has been especially enjoyable. I cherish the time I get to spend with my family and look forward to being able to travel more easily to see the world as the pandemic subsides.
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.
Research and Publications
Morikawa A, Grkovski M, Patil S, Jhaveri KL, Tang KL, Humm JL, Holodny A, Beal K, Schöder H, Seidman AD. A phase I trial of sorafenib with whole brain radiotherapy (WBRT) in breast cancer patients with brain metastases and a correlative study of FLT-PET brain imaging. Breast Cancer Res Treat 2021.
Seidman AD, Maues J, Tomlin T, Bhatnagar V, Beaver JA. The evolution of clinical trials in metastatic breast cancer: Design features and endpoints that matter. Am Soc Clin Oncol Educ Book 40:1-11, 2020.
Tripathy D, Cortes J, Seidman AD, et al. ATTAIN: Etirinotecan Pegol Versus Treatment of Physician’s Choice in Patients with Breast Cancer and Brain Metastases. Future Oncology 15(19):2211-25, 2019.
Seidman AD, Bordeleau L, Fehrenbacher L et al. National Cancer Institute Breast Cancer Steering Committee Working Group Report on Meaningful and Appropriate End Points for Clinical Trials in Metastatic Breast Cancer. J Clin Oncol 36(32):3259-68, 2018. Special Article
Morikawa A, Patil S, Diab A, Yang J, Hudis CA, McArthur HL, Beal K, Seidman AD. Characteristics and prognostic factors for patients with HER2-overexpressing breast cancer with brain metastasis in the era of HER-2 targeted therapy: An argument for earlier detection. Clin Breast Cancer 18(5):353-361, 2018.
Morikawa A, Peereboom DM, Thorsheim HR, Samala R, Balyan R, Murphy CG, Lockman PR, Simmons A, Weil RJ, Tabar V, Steeg PS, Smith QR, Seidman AD. Capecitabine and lapatinib uptake in surgically resected brain metastases from metastatic breast cancer patients: a prospective study. Neuro-Oncol 17(2):289-95, 2015.
Brogi E, Murphy CG, Johnson ML, Conlin AK, Hsu M, Patil S, Akram M, Nehhozina T, Jhaveri KL, Hudis CA, Seidman AD. Breast carcinoma with brain metastases: clinical analysis and immunoprofile on tissue microarrays. Ann Oncol 22(12):2597-603, 2011.
Seidman AD, Berry D, Cirrincione C, Harris L, Muss H, Marcom PK, Gipson G, Burstein H, Lake D, Shapiro CL, Ungaro P, Norton L, Winer E, Hudis C. Randomized phase III trial of weekly compared with every-3-weeks paclitaxel for metastatic breast cancer with trastuzumab for all HER-2 overexpressors and random assignment to trastuzumab or not in HER-2 nonoverexpressors: final results of Cancer and Leukemia Group B protocol 9840. J Clin Oncol 26(10):1642-1649, 2008.
Visit PubMed for a full listing of Dr. Seidman’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.
Doctors and faculty members often work with pharmaceutical, device, biotechnology, and life sciences companies, and other organizations outside of MSK, to find safe and effective cancer treatments, to improve patient care, and to educate the health care community.
MSK requires doctors and faculty members to report (“disclose”) the relationships and financial interests they have with external entities. As a commitment to transparency with our community, we make that information available to the public.
Andrew D. Seidman discloses the following relationships and financial interests:
Hackensack University Medical Center
Provision of Services
Provision of Services
Provision of Services
Provision of Services
Provision of Services
If you’re a patient at MSK and would like more information about your doctor’s external relationships, please talk with your doctor.
The information published here is for a specific annual disclosure period. There may be differences between information on this and other public sites as a result of different reporting periods and/or the various ways relationships and financial interests are categorized by organizations that publish such data.
This page and data include information for a specific MSK annual disclosure period (January 1, 2020 through disclosure submission in spring 2021). This data reflects interests that may or may not still exist. This data is updated annually.