Monica El-Masry, M.D.

(877) 460-4673
Monica El-Masry, M.D.
Medical Oncologist
Clinical Expertise

Medical Oncology
Hematology

Academic Appointments

Associate Clinical Professor, Department of Medical Oncology & Therapeutics Research, City of Hope Simi Valley

Monica El-Masry, M.D., is an associate clinical professor in the Department of Medical Oncology & Therapeutics Research at City of Hope® Simi Valley, where she treats patients with all cancer types and hematologic conditions.

She is committed to providing personalized, compassionate care and understands that each patient’s journey is unique. Dr. El-Masry takes time to listen to her patients’ stories and treats each individual as part of her own family, honoring their cultural, religious, and personal values. She encourages patients to take an active role in their care and strives to offer hope, comfort, and resilience throughout their treatment.

“We are a team and we will work together to find the most advanced and innovative treatment that is right for you," Dr. El-Masry says.

Dr. El-Masry earned her medical degree from the David Geffen School of Medicine at UCLA, completed her residency at UCLA–Olive View Medical Center, and her fellowship at UC Irvine’s Chao Comprehensive Cancer Center. She has authored over a dozen peer-reviewed publications, presented at national conferences, and is a two-time recipient of the Henry Mayo Newhall Hospital Doctors Day Award for Outstanding Patient Care.

Location

Education & Experience

Degrees

  • 2009, Doctor of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA
  • 2005, Bachelor of Science, Psychobiology, University of California, Los Angeles, CA

Residency

  • 2009-2012, Internal Medicine, UCLA-Olive View Medical Center, Los Angeles, CA

Fellowship

  • 2014-2017, Hematology/Oncology, University of California, Irvine, CA

Professional Experience

  • 2025-present, Associate Clinical Professor, Department of Medical Oncology & Therapeutics Research, City of Hope, Simi Valley, CA
  • 2023-2025, Hematology/Oncology Attending Physician, Assistant Professor of Medicine, USC Santa Clarita, CA
  • 2019-2022, Hematology/Oncology Attending Physician, UCLA Health Porter Ranch, Porter Ranch, CA
  • 2017-2022, Hematology/Oncology Attending Physician, Greater Los Angeles Veteran's Affairs, Los Angeles, CA

Awards & Memberships

Board Certification

  • 2018, American Board of Internal Medicine- Hematology
  • 2017, American Board of Internal Medicine- Medical Oncology
  • 2012, American Board of Internal Medicine

Publications

  • Rosing DK, de Virgilio C, Yaghoubian A, El Masry M, Kaji A, Stabile BE. Early cholecystectomy for mild to moderate gallstone pancreatitis shortens hospital stay. J Am Coll Surg. 2007 Dec;205(6):762-6. PMID: 18035259
  • Yaghoubian A, De Virgilio C, El-Masry M, Lewis RJ, Stabile BE. Gallstone Pancreatitis: a benign disease in Hispanics. Am Surg. 2007 Oct;73(10):1071-4. PMID: 17983084
  • Rosing DK, De Virgilio C, Nguyen AT, El Masry M, Kaji AH, Stabile BE. Cholangitis: analysis of admission prognostic indicators and outcomes. Am Surg. 2007 Oct;73(10):949-54. PMID: 17983054
  • El-Masry M, Gilbert CP, Saab S. Recurrence of non-viral liver disease after orthotopic liver transplantation. Liver Int. 2011 Mar;31(3):291-302. PMID: 21281429
  • El-Masry M, Hu R. Cecal Varices Presenting as Anemia: Case Report and Review of the Literature. Case Rep Gastroenterology. 2010; 4:524-527.
  • El-Masry, Monica, Eysselein, Viktor M. Recurrent Eosinophilic Pancreatitis: A Case report and Review of the Literature. American Journal of Gastroenterology: October 2010;105: 208
  • Deboyes T, Sherrod Q, El-Masry M, Williams EA, Chiu MW. Circumscribed palmar hypokeratosis. Int J Dermatol. 2011 Jun 15.
  • El-Masry M, Eisenbud L, Minh-Ha T. Secondary HLH in the setting of metastatic renal cell carcinoma: a case report. Journal of Medical Case Reports. 2017 Mar 2;11(1):56.
  • Fruehauf, JP, El-Masry, M, Osann, K, Parmakhtiar, B, Yamamoto, M, Jakowatz, J. A Phase II Study of Pazopanib in combination with Paclitaxel in patients with metastatic melanoma. Cancer Chemotherapy and Pharmacology. 2018 Aug;82(2):353-360.
  • Hanna, R, Selamet, U, Hasnain, H, El-Masry, M, Saab, S, Wallace, W. Yanny, B, Wilson, J. Development of focal segmental glomerulosclerosis and thrombotic microangiopathy in a liver transplant patient on sorafenib for hepatocellular carcinoma. Transplantation Proceedings. December 2018. Volume 50; 10: 4033-4037.
  • Khan, Y, Lyou, Y, El-Masry, M, O’Brien, S. Reassessing the role of chemoimmunotherapy in chronic lymphocytic leukemia. Expert Review of Hematology. 2020 Jan;13(1):31-3.
  • Hornstein, N, Razmjou A, Weinreb, A, El-Masry, M. Mimic of malignancy: delineating IgG4-related disease and lymphoma. BMJ Case Reports. 2021 March 3;14(3):e23746.
  • Bishop, C, El-Masry, M. A Classic Case of Autoimmune Atrophic Gastritis. UCLA Proceedings. June 2022
  • Puliafito, B, Ovieysi, D, Fanous, C, El-Masry, M. Secondary B Cell Acute Lymphoblastic Leukemia in a Patient with Multiple Myeloma. British Journal of Medical Case Reports 2022 June 22;15(6)e249637
  • Bahdi, Firas, Alkassis, Samer, Lewis, Michael, El-Masry, Monica. Bejjani, Anthony, Kolb, Jennifer. Numerous gastric nodules in a leukaemia patient. Gut. 2024 Jan 5;73(2): 281-337
  • Kyle T O'Meara , Kush Fansiwala , Nikhita Kathuria-Prakash, Monica El-Masry, Scott Oh. Acute hypoxic respiratory failure due to Lenalidomide-induced interstitial pneumonitis in a patient with multiple myeloma. BMC Pulmonary Medicine. 2024 July 4;24 (1):321