Jeffrey Zwicker, MD
Chief, Hematology Service
Deep Vein Thrombosis and Pulmonary Embolism; Anticoagulation; Blood Count Disorders (i.e., Anemia, Low or Elevated Platelet Count)
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New Patient Appointments
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Dr. Zwicker 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, Penn State College of Medicine; MMS, Harvard Medical School
Intern and Resident, Beth Israel Deaconess Medical Center, Harvard Medical School
Hematology/Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School
As Chief of the Hematology Service at Memorial Sloan Kettering Cancer Center (MSK), I lead a team of hematologists that sees approximately 4,040 patients with benign blood disorders each year.
At MSK, my fellow hematologists and I collaborate to deliver personalized cancer care that considers each patient’s needs and preferences. When I meet with patients, I don’t just treat them as if they were my own family members — I try to put myself in their shoes. Often, patients are concerned about the blood-related complications that can occur with cancer treatment. Some of the questions that patients ask me most frequently relate to the likelihood of experiencing blood-related complications on a medication, other possible side effects, and how long they need to be on a specific therapy. I take the time to clearly explain what patients can expect and address the concerns related to their condition. No matter the diagnosis, there is world-class expertise at MSK.
In patients with cancer, blood-related disorders, such as blood clots, low blood counts including anemia, and bleeding disorders, which may require special attention, regardless of whether the disorder is pre-existing, or a side effect of cancer treatment. Patients who already had a blood disorder before they were diagnosed with cancer might tailored therapies.
Sometimes, patients receiving cancer therapy will experience blood-related side effects. These can include blood clots that form in a deep vein (deep vein thrombosis [DVT]) or decreases in the number of platelets in the blood (thrombocytopenia). Cancer-associated thrombosis is a condition that can develop when someone is undergoing treatment for cancer. Beyond caring for existing blood-related disorders, the Hematology Service also provides prompt medical attention to address any blood-related side effects, including thrombosis.
In addition to caring for patients with benign blood disorders, I study cancer-associated thrombosis to better understand its risk factors and develop novel treatment approaches. To date, I have led several National Institutes of Health-funded studies in cancer-associated thrombosis. I currently serve as the Chair of the International Society on Thrombosis and Haemostasis. Inc.’s (ISTH) subcommittee on hemostasis and thrombosis. I also previously acted as the Vice-Chair and Chair of the American Society of Hematology’s subcommittee on thrombosis and vascular biology. Through research and leadership in national and international professional organizations dedicated to thrombosis, I hope to improve the prevention and treatment of cancer-associated thrombosis.
Awards and Honors
- Gordon J. Strewler Mentorship of Resident Research Award, Department of Medicine, Beth Israel Deaconess Medical Center (2021)
- Program for Emerging Leaders, Harvard Medical School (2015)
- Merck Award for Outstanding Academic Performance, Penn State College of Medicine (1998)
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
Wang TF, Sanfilippo KM, Douketis J, Falanga A, Karageorgiou J, Maraveyas A, Ortel TL, Soff G, Vedantham S, Zwicker JI. Peri-procedure management of antithrombotic agents and thrombocytopenia for common procedures in oncology: Guidance from the SSC of the ISTH. J Thromb Haemost. 2022 Sep 26. doi: 10.1111/jth.15896. Epub ahead of print. PMID: 36217296.
Khan AM, Chiasakul T, Redd R, Patell R, McCarthy EP, Neuberg D, Zwicker JI. Survival outcomes with warfarin compared with direct oral anticoagulants in cancer-associated venous thromboembolism in the United States: A population-based cohort study. PLoS Med. 2022 May 25;19(5):e1004012. doi: 10.1371/journal.pmed.1004012. PMID: 35613184; PMCID: PMC9182592.
Sharda AV, Bogue T, Barr A, Mendez LM, Flaumenhaft R, Zwicker JI. Circulating Protein Disulfide Isomerase Is Associated with Increased Risk of Thrombosis in JAK2-Mutated Myeloproliferative Neoplasms. Clin Cancer Res. 2021 Oct 15;27(20):5708-5717. doi: 10.1158/1078-0432.CCR-21-1140. Epub 2021 Aug 16. PMID: 34400417; PMCID: PMC9170286.
Patell R, Bogue T, Koshy A, Bindal P, Merrill M, Aird WC, Bauer KA, Zwicker JI. Postdischarge thrombosis and hemorrhage in patients with COVID-19. Blood. 2020 Sep 10;136(11):1342-1346. doi: 10.1182/blood.2020007938. PMID: 32766883; PMCID: PMC7483433.
Zwicker JI, Schlechter BL, Stopa JD, Liebman HA, Aggarwal A, Puligandla M, Caughey T, Bauer KA, Kuemmerle N, Wong E, Wun T, McLaughlin M, Hidalgo M, Neuberg D, Furie B, Flaumenhaft R; CATIQ Investigators11. Targeting protein disulfide isomerase with the flavonoid isoquercetin to improve hypercoagulability in advanced cancer. JCI Insight. 2019 Feb 21;4(4):e125851. doi: 10.1172/jci.insight.125851. PMID: 30652973; PMCID: PMC6478409.
Visit PubMed for a full listing of Dr. Zwicker’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.
At MSK, we’re committed to delivering the best care to every patient. We use feedback from our patients to continue to improve our care. We also post patient reviews online to help you make healthcare choices. Learn more about our patient experience reviews.