Physician’s Profile

Mary R. Welch, MD

Department of Neurology
Division of Neuro-oncology

Mary Welch, MD is an Assistant Professor of Neurology at CUMC, in the Division of Neuro-Oncology. Dr. Welch graduated from Chicagos' 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.

Board Certificates
Areas of Expertise:
  • Acoustic Neuroma
  • Anaplastic Astrocytoma
  • Astrocytoma
  • Brain & Spinal Tumors
  • Brain Cancer
  • Brain Metastases
  • Brain Stem Glioma
  • Brain Tumor
  • Carcinomatous meningitis
  • Chordoma
  • Choroid Plexus Carcinoma
  • Choroid Plexus Papilloma
  • Ependymoma
  • Glioblastoma
  • Glioblastoma Multiforme
  • Gliomas
  • Hemangioblastoma
  • Leptomeningeal metastases
  • Medulloblastoma
  • Meningioma
  • Metastatic Cancer
  • Mixed Glioma
  • Neuro-Oncology
  • Neurofibromatosis
  • Neurology
  • Oligoastrocytoma
  • Oligodendroglioma
  • Second Opinion
  • Spinal Cord Tumor
  • Spinal Tumors
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 M. Diplopia 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.