Sahaja Acharya, M.D.

Headshot of Sahaja Acharya
  • Director, Pediatric Radiation Oncology
  • Assistant Professor of Radiation Oncology and Molecular Radiation Sciences

Languages: English, Nepalese


Pediatric Brain Tumors, Pediatric Sarcoma, Sarcoma more


Johns Hopkins Sidney Kimmel Comprehensive Cancer Center

401 N. Broadway
Baltimore, MD 21231 map
Phone: 443-287-7889 | Fax: 410-502-1419

Sibley Memorial Hospital

5255 Loughboro Road NW
Washington, DC 20016 map
Phone: 202-537-4788 | Fax: 202-537-4964


Sahaja Acharya is the Director of Pediatric Radiation Oncology within the Department of Radiation Oncology and Molecular Radiation Sciences. She specializes in pediatric brain tumors, pediatric sarcomas, and adult sarcomas. She is also the Associate Director for the Radiation Oncology Residency Program. 

She leads the Pediatric Radiation Oncology program at the Johns Hopkins Hospital and treats patients at both Johns Hopkins Hospital and Sibley Memorial Hospital. She has extensive expertise in proton therapy, SBRT, pediatric malignancies and adult sarcoma. She is the Principal Investigator on external grants from ASCO Conquer Cancer and the Department of Defense. She is also the Principle Investigator of phase II pediatric brain tumor clinical trials. She has been invited to participate in multiple national and international guideline committees and regularly lectures on pediatric malignancies and proton therapy. She mentors medical students, clinical residents and physics residents and her research portfolio can be found on the webpage below.  

Dr. Acharya's research webpage: more


  • Director, Pediatric Radiation Oncology
  • Associate Director, Radiation Oncology Residency Program
  • Assistant Professor of Radiation Oncology and Molecular Radiation Sciences
  • Assistant Professor of Oncology

Departments / Divisions



  • MD; Saint Louis University School of Medicine (2012)


  • Radiation Oncology; Washington University School of Medicine in St Louis (2017)

Board Certifications

  • American Board of Radiology (Radiation Oncology) (2018)

Research & Publications

Selected Publications

View all on PubMed

Acharya S, Guo Y, Patni T, et al: Association Between Brain Substructure Dose and Cognitive Outcomes in Children With Medulloblastoma Treated on SJMB03: A Step Toward Substructure-Informed Planning. Journal of  Clinical Oncology, 2021; PMID: 34714708

Perkins S, Acharya S. Radiation therapy to the developing brain: advanced technology is ready for robust optimization parameters. Neuro Oncol. 2021 Mar 25;23(3):350-351. doi: 10.1093/neuonc/noab007. PMID: 33560406; PMCID: PMC7992876.

Acharya S, Wang C, Quesada S, Gargone MA, Ates O, Uh J, Krasin MJ, Merchant TE, Hua CH. Adaptive Proton Therapy for Pediatric Patients: Improving the Quality of the Delivered Plan with On-Treatment MRI. Int J Radiat Oncol Biol Phys. 2021 Jan 1;109(1):242-251. doi: 10.1016/j.ijrobp.2020.08.036. Epub 2020 Oct 28. PMID: 33129626.

Acharya S, Liu JF, Tatevossian RG, Chiang J, Qaddoumi I, Gajjar A, Walker D, Harreld JH, Merchant TE, Ellison DW. Risk stratification in pediatric low-grade glioma and glioneuronal tumor treated with radiation therapy: an integrated clinicopathologic and molecular analysis. Neuro Oncol. 2020 Aug 17;22(8):1203-1213. doi: 10.1093/neuonc/noaa031. PMID: 32052049

Acharya S, Wu S, Ashford JM, Tinkle CL, Lucas JT, Qaddoumi I, Gajjar A, Krasin MJ, Conklin HM, Merchant TE. Association between hippocampal dose and memory in survivors of childhood or adolescent low-grade glioma: a 10-year neurocognitive longitudinal study. Neuro Oncol. 2019 Sep 6;21(9):1175-1183. doi: 10.1093/neuonc/noz068. PMID: 30977510

Activities & Honors


  • Department of Defense CDMRP Award 2023
  • Early Career Women's Leadership Program 2023
  • Young Investigator Award SIOP 2021
  • Conquer Cancer ASCO Career Development Award 2020
  • ASCO/AACR Methods in Clinical Trials Participant 2017
  • PTCOG Fellow 2017
  • NCCN Oncology Fellow 2017
  • Roentgen Resident Research Award 2017
  • ASCO Merit Award 2015

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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