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Ralph Ermoian, M.D.

Associate Professor

Locations of Practice

SCCA Proton Therapy

1570 N 115th Street
Seattle, WA 98133

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Seattle Children’s

4800 Sand Point Way NE
Seattle, WA 98105

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Dr. Ermoian is a radiation oncologist who treats pediatric patients with brain tumors, blood tumors requiring stem cell transplants, and salivary gland tumors. He is the UW Department of Radiation Oncology program and disease site lead for pediatric and childhood tumors. Dr. Ermoian practices at UW Medical Center, Seattle Children’s, and SCCA Proton Therapy.

Patient Care Philosophy

“I want to provide the same care that I would want and expect of my own health-care providers if I had cancer: compassionate, detail-oriented, and patient-centered care that is tailored to the patient’s medical needs and goals.”

Education and Training

College: M.S. and B.S., Stanford University, Palo Alto, CA, 1993

Medical Education: UCSF School of Medicine, San Francisco, CA, 2003

Internship: Children’s Hospital, Boston Pediatrics, Boston, MA, 2004


  • Pediatrics, University of California – San Francisco, San Francisco, CA, 2007
  • Radiation Oncology, University of Washington, Seattle, WA, 2011

Published Works

•Ermoian RP, Kalina RE, Yu EY, Parvathaneni U. Ocular Metastasis Secondary to Prostate Cancer Treated with External Beam Radiation. Retinal Cases and Brief Reports. Accepted for Publication

•Ermoian RP, Kaprealian T, Lamborn KR, Yang X, Arvold ND, Zeidman R, Berger MS, Stokoe D, Haas-Kogan DA. Signal Transduction Molecules in Gliomas of All Grades. Journal of Neurooncology. 2009; 91: 19-26

•Ermoian RP, Furniss CS, Lamborn KR, Berger MS, Gottschalk AR, Nicholas MK, Stokoe DF, and Haas-Kogan DA. Dysregulation of PTEN and PKB is Associated with Glioma Histology and Patient Survival. Clinical Cancer Research. May 2002. 8(5): 1100-6

•Chan GK, Sale S, Tan T, Ermoian RP, Sikic BI. CCAAT/Enhancer-Binding Protein β (Nuclear Factor for Interleukin 6) Transactivates the Human MDR1 Gene by Interaction with an Inverted CCAAT Box in Human Cancer Cells. Molecular Pharmacology. April 2004. 65 (4):906-11

Board Certification

American Board of Pediatrics, Pediatrics, 2007

American Board of Radiology, Radiation Oncology, 2012