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Mary R. Welch, MD

  • Assistant Professor of Neurology at CUMC
Mary R. Welch, MD

Mary Welch, MD is an Assistant Professor of Neurology at CUMC, in the Division of Neuro-Oncology. Dr. Welch graduated from Chicago’s Northwestern Feinberg School of Medicine. She completed neurology residency here at Columbia, followed by sub-specialty training in neuro-oncology at Memorial Sloan-Kettering Cancer Center. In her second year of fellowship, she earned a Comparative Effectiveness Research Award to attend Columbia’s Summer Research Institute at Mailman School of Public Health.

Upon completing her training, Dr. Welch worked for several years as a practicing neuro-oncologist and Assistant Professor of Neurology at Montefiore Medical Center in the Bronx. There, she served as principal investigator for numerous phase I and II clinical trials for the treatment of primary and metastatic brain cancer. She also developed a strong research interest in improving patient access to both standard and investigational therapies. In addition to seeing both inpatient and outpatient neuro-oncology patients, Dr. Welch maintains an active research program within the Division of Neuro-Oncology.

Departmental Appointments

  • Department of Neurology
    Division of Neuro-oncology

Languages Spoken

(in addition to English)

  • French

Education & Training

  • MD, Northwestern University Feinberg School of Medicine
  • Internship: New York University Langone Medical Center
  • Residency: NewYork-Presbyterian Hospital/Columbia University Medical Center
  • Fellowship: Memorial Sloan-Kettering Cancer Center

Contact Info

  • Office Phone: (212) 342-0571


American Academy of Neurology, Member

Society for Neuro-Oncology, Member

American Society of Clinical Oncology, Member

Alliance for Clinical Trials in Oncology, Member

NRG Oncology, Member

Honors & Awards

ASCO Conquer Cancer Foundation Merit Award

Comparative Effectiveness Research Award

Arnold P. Gold Humanism and Excellence in Teaching Award


Pareek V, Welch M, Ravera E, Zampolin RL, Sequist LV, Halmos B. Marked differences in CNS activity amongst EGFR inhibitors: case report and mini-review. J Thorac Oncol. 2016 Jul 24 [Epub ahead of print]

Yang Y, Haigentz M, Welch MDiplopia and Ataxia in a Heavy Smoker. JAMA 2015 September; 314(9):942-943.

Glover R, Brook A, Welch M. Teaching Neuroimages: Leptomeningeal carcinomatosis.  Neurology 2014 May; 82(21): e183-4.

Welch M, Sauter C, Matasar M, Moskowitz C, Omuro A. Autologous stem cell transplant in recurrent or refractory primary or secondary central nervous system lymphoma using thiotepa, busulfan, and cyclophosphamide. Leukemia and Lymphoma. 2015; 56(2):361-7.

Welch M, Grommes C.  Influence of anti-diabetic therapy of diabetes mellitus type II (DM) on survival in glioblastoma (GBM) patients. CNS Oncology. 2013 2(3), 237–246.

Welch M, Omuro A, DeAngelis L. Outcomes of the Oldest Patients with Primary Central Nervous System Lymphoma Treated at Memorial Sloan-Kettering Cancer Center. Neuro-Oncology. 2012 Oct; 14(10):1304-11.