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Stanislav Lazarev, MD
Radiation Oncology
About Me
Dr. Stanislav (Stas) Lazarev, MD, is an Associate Professor in the Department of Radiation Oncology. He provides patient care at both Mount Sinai Hospital and the New York Proton Center. Dr. Lazarev specializes in the personalized treatment of central nervous system (CNS) tumors, including primary and metastatic brain and spinal cord tumors in both children and adults, leptomeningeal disease (LMD), pediatric tumors, and the re-irradiation of CNS, thoracic, and hepatobiliary tumors. His other major focus is the radiation treatment of primary thoracic and hepatobiliary tumors using proton beam therapy. His clinical expertise includes proton craniospinal irradiation (CSI) for LMD, proton re-irradiation, proton radiotherapy for pediatric tumors, and low-dose re-irradiation for recurrent pediatric diffuse intrinsic pontine gliomas (DIPGs) and diffuse midline gliomas (DMGs) H3 K27-altered WHO Grade 4.
In recognition of his dedication to compassionate and effective communication, Dr. Lazarev was honored with the Cullman Family Award for Excellence in Provider Communication in 2024. Out of over 117,000+ providers surveyed nationwide, Dr. Lazarev was among 89 Mount Sinai providers who ranked in the top 5% nationally in provider communication, as measured by the Press Ganey 2023 patient experience surveys.
Dr. Lazarev’s dedication to education has been recognized with the Association of Residents in Radiation Oncology (ARRO) Educator of the Year Award in both 2022 and 2024. In 2023, he was honored with the STAR Employee Award for his exceptional service and commitment to Mount Sinai’s core values. From 2022 to 2024, Dr. Lazarev served as the Associate Program Director of Mount Sinai Radiation Oncology Residency Program.
Dr. Lazarev’s research focuses on proton craniospinal irradiation in LMD, re-irradiation for recurrent primary brain tumors, and proton therapy for pediatric cancers. He serves as the institutional principal investigator for the NRG Oncology BN012 clinical trial, a randomized phase III study comparing pre-operative versus post-operative stereotactic radiosurgery for resectable brain metastases. His work has been widely published in leading journals, including Nature Reviews Clinical Oncology, Neuro-Oncology, International Journal of Radiation Oncology, Biology, Physics, Advances in Radiation Oncology, and The Oncologist.
Internationally, Dr. Lazarev is actively involved in the Brain Tumors in Latin America Program, an initiative of St. Jude Children’s Research Hospital. He participates in a weekly Global Pediatric CNS Tumor Board, collaborating with leading pediatric oncologists from the USA, Canada, Germany, and Spain to provide expertise on complex pediatric CNS cases from low- and middle-income countries in Central and South America. Dr. Lazarev also contributes to the National Ewing Sarcoma Tumor Board, providing radiation oncology expertise for challenging casesinvolving both pediatric and adult patients with Ewing sarcoma. His clinical insights are regularly sought by colleagues worldwide.
Dr. Lazarev is fluent in Russian, Spanish, and Portuguese, proficient in French, has basic knowledge of Hebrew, and is currently learning Arabic to better communicate with his diverse patient population. He believes that speaking to patients in their native language fosters trust and improves the quality of care.
Beyond his clinical and academic responsibilities, Dr. Lazarev actively contributes to the field of radiation oncology through his involvement with TheMedNet.org and engagement with the professional community on X.com (formerly Twitter). His perspectives on neuro-oncology, CNS radiation oncology, and pediatric radiation oncology have garnered attention and fostered meaningful discussions among colleagues. Dr. Lazarev is also a sought-after speaker at national and international academic forums, where he shares insights and advances to further the field.
Dr. Lazarev’s work reflects his dedication to advancing cancer care across all settings, from local clinical practice to national and international initiatives, ensuring that his expertise benefits diverse patient populations while driving innovations in radiation oncology.
Language
English, Russian, Portuguese, Spanish
Position
ASSOCIATE PROFESSOR | Radiation Oncology
Hospital Affiliations
- Mount Sinai Queens
- The Mount Sinai Hospital
Clinical Focus
- Cancer Treatment
- Radiation Therapy
- Stereotactic Radiosurgery
Education
MD, University of Vermont College of Medicine
Internship, Internal Medicine
Alameda County Medical Center-Highland
Residency, Radiation Oncology
Icahn School of Medicine At Mount Sinai
Certifications
Radiation Oncology
Insurance Information
Accepted insurance may vary by the doctor’s office location. Please contact the office directly to obtain the most up-to-date insurance information.
- 1199 SEIU
- AETNA - Commercial
- AETNA - Medicare
- Affinity Medicaid-Medicare-Essential Exchange
- Amidacare Medicaid
- CIGNA Healthcare
- Centivo
- Elderplan
- EmblemHealth - GHI-PPO
- EmblemHealth - HIP
- EmblemHealth - HIP-Medicaid
- EmblemHealth - HIP-Medicare
- Empire Blue Cross Blue Shield - Commercial/Exchange
- Empire Blue Cross Blue Shield - HealthPlus Medicaid
- Empire Blue Cross Blue Shield - Medicare
- Fidelis Health Care
- HealthFirst Medicaid
- HealthFirst Medicare
- Horizon NJ
- Magnacare-Health Care
- Medicare - NJ
- Medicare - NY
- Metroplus
- Multiplan PHCS
- NJ Medicaid
- NY Medicaid
- Oscar
- Oxford - Freedom and Liberty
- Partners Health Plan
- Senior Whole Health
- United Health Care - Commercial
- United Health Care - Empire Plan
- United Health Care - Oxford Care
- United Health Care - Top Tier
- VNSNY Choice Medicare
- VNSNY Select Health Medicaid
- VillageCareMax
- WellCare Health Plan
Physicians who provide services at hospitals and facilities in the Mount Sinai Health System might not participate in the same health plans as those Mount Sinai hospitals and facilities (even if the physicians are employed or contracted by those hospitals or facilities).
Information regarding insurance participation and billing by this physician may be found on this page, and can also be obtained by contacting this provider directly. Because physicians insurance participation can change, the insurance information on this page may not always be up-to-date. Please contact this physician directly to obtain the most up-to-date insurance information.
Insurance and health plan networks that the various Mount Sinai Health System hospitals and facilities participate in can be found on the Mount Sinai Health System website.
Patient Experience Star Ratings and Comments
The Patient Experience Star Rating reflects our patients’ perception of how well their Mount Sinai provider communicated with them during an office visit. The Star Rating is based on patient responses to three questions on a patient experience survey, a standardized questionnaire sent to verified patients and distributed by a third party vendor, Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score.
Industry Relationships
Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.
Dr. Lazarev has not yet completed reporting of Industry relationships.
Mount Sinai’s faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.