Stanislav Lazarev MD

Assistant Professor, Mount Sinai Hospital and New York Proton Center, New York, NY

1184 5th AveNew York, NY 10029
Phone+1 646-872-9186
Fax+1 212-410-7194

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Summary

Dr. Stanislav (Stas) Lazarev, MD, is an Assistant Professor and the Associate Program Director of the Radiation Oncology Residency Program at the Icahn School of Medicine at Mount Sinai in New York City. 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 cancers, and low-dose re-irradiation for recurrent pediatric diffuse intrinsic pontine glioma (DIPG) and diffuse midline glioma, 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. 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 commitment to education has also been recognized with the Association of Residents in Radiation Oncology (ARRO) Educator of the Year Award in both 2022 and 2024.

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.

Education & Training

Icahn School of Medicine at Mount SinaiResidency, Radiation Oncology, 2015 - 2019
University of Vermont College of MedicineClass of 2014
University of California, BerkeleyB.A., Biochemistry and Molecular Biology, Magna Cum Laude, 2009
Pyatigorsk State Linguistic UniversityB.A. Candidate, Theory and Practice of Translation and Interpretation (Russian/English/Spanish) , 2004
Instituto CervantesDiploma of Spanish as a Second Language (DELE), 2003

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Certifications & Licensure

NY State Medical License 2019 - 2028
American Board of Radiology Radiation Oncology

Awards, Honors, & Recognition

Best of ASTRO Abstract 2017
Summer Undergraduate Research Fellowship Scholarship Yale University, 2008
Alumni Leadership Award Scholarship University of California, Berkeley, 2007-2008

Publications & Presentations

PubMed

A rare case of intradural extramedullary anaplastic ependymoma: a 35-month survival update following resection and adjuvant proton beam radiation therapy. Illustrative...
Bahie Ezzat, Tirone Young, Noah M Nichols, Timothy E Richardson, Stanislav Lazarev
Journal of Neurosurgery. Case Lessons. 2026-05-18
1 citations
In Regard to Mehta et al.
Anna Skakodub, Kunal K Sindhu, Stanislav Lazarev
International Journal of Radiation Oncology, Biology, Physics. 2026-03-01
Feasibility and Outcomes of Perirectal Spacer Implantation in Previously Treated Prostate Cancer Patients Undergoing Salvage Proton Therapy Radiation.
Irini Yacoub, Keyur Mehta, Daniel Gorovets, Shaakir Hasan, J Isabelle Choi
Advances in Radiation Oncology. 2026-03-01

Journal Articles

Premature Discontinuation of Curative Radiotherapy: Insights from Head and Neck Irradiation
Lazarev S, Gupta V, Ghiassi-Nejad Z, Miles B, Scarborough B, Misiukiewicz KJ, Reckson B, Sheu R, Bakst R, Advances Radiat Oncol
Low-Dose-Rate Brachytherapy for Prostate Cancer: Outcomes Beyond 10-years of Follow-Up
Lazarev S, Thompson M, Stone N, Stock R, BJU Int, 1/1/2018
Premature Discontinuation of Curative Radiotherapy: Insights from Head and Neck Irradiation
Lazarev S, Gupta V, Ghiassi-Nejad Z, Miles B, Scarborough B, Misiukiewicz KJ, Reckson B, Sheu R, Bakst R, Advances Radiat Oncol, 1/1/2018

Abstracts/Posters

Discontinuation of Curative Head and Neck Irradiation: Etiologies and Outcomes.
Lazarev S, Ghiassi-Nejad Z, Gupta V, Miles B, Scarborough B, Misiukiewicz K, Reckson B, Sheu R, Bakst R, Multidisciplinary Head And Neck Cancers Symposium, Scottsdale, AZ, 1/1/2018
Premature Discontinuation of Curative Radiotherapy: Insights from Head and Neck Irradiation.
Lazarev S, Gupta V, Ghiassi-Nejad Z, Scarborough B, Reckson B, Sheu R, Bakst R, 59th American Society for Radiation Oncology Annual Meeting, San Diego, CA, 1/1/2017
Clinical Outcomes after Premature Discontinuation of Curative Head and Neck Irradiation.
Lazarev S, Ghiassi-Nejad Z, Gupta V, Misiukiewicz K, Miles B, Sheu R, Bakst R, 59th American Society for Radiation Oncology Annual Meeting, San Diego, CA, 1/1/2017

Lectures

Oncological Emergencies: What is the Role of Radiation Therapy?
Oakland, CA - 1/5/2018
Low-dose-rate Brachytherapy as Monotherapy for High-Risk Prostate Cancer: 15-year Outcomes Data.
Orlando, FL - 1/1/2018
"Bath Salts": The New Designer Drug of Abuse
Burlington, VT - 1/1/2012

Other

LDR Brachytherapy for Prostate Cancer Offers Excellent Survival
Lazarev S, Renal & Urology News
1/1/2018
Optimizing treatment positioning to achieve better heart sparing in a left-sided, whole-breast irradiation case unfit for deep-inspiration breath-hold treatment
Dumane VA, Lazarev S, Sheu RD, Lo YC, Green S, Appl Rad Oncol.
http://appliedradiationoncology.com/articles/optimizing-treatment-positioning-to-achieve-better-heart-sparing-in-a-left-sided-whole-breast-irradiation
Appl Rad Oncol. 2016;5(2):22-26 - 5/2016

Press Mentions

Vorasidenib for Certain IDH-Mutant Gliomas: Is It Worth It?December 2nd, 2024
Mount Sinai Researchers Publish Critical Examination of New Brain Tumor DrugSeptember 23rd, 2024
Suny Downstate Hematology Oncology FellowshipJune 11th, 2021