Locations and Appointments
Insurances Accepted
Before your appointment, please contact the doctor's office or your insurance provider to verify that your insurance is accepted. This list of insurances can change, and the insurance plans listed may not be accepted at all office locations for this provider.
- EPO
- POS
- Medicare Managed Care
- NY Signature
- Student Health
- Aetna Signature Administrators
- HMO
- PPO
- Medicaid Managed Care
- Essential Plan
- Special Needs
- HMO
- PPO
- EPO
- POS
- Great West (National)
- PPO
- Medicare Managed Care
- Select Care (Exchange)
- Vytra
- ConnectiCare
- PPO
- HMO
- Essential Plan
- Medicaid Managed Care
- Medicare Managed Care
- POS
- EPO
- Child/Family Health Plus
- Medicaid Managed Care
- Essential Plan
- EPO
- PPO
- HMO
- Medicare Managed Care
- Essential Plan
- Medicaid Managed Care
- Medicare Managed Care
- Child/Family Health Plus
- Leaf (Exchange)
- Medicaid Managed Care
- Medicare Managed Care
- Child/Family Health Plus
- Medicare Managed Care
- Local 1199
- MagnaCare
- Railroad
- Traditional Medicare
- Multiplan
- HMO
- Medicaid Managed Care
- Essential Plan
- Child/Family Health Plus
- Special Needs
- Compass (Exchange)
- HMO
- Empire Plan
- PPO
- POS
- Oxford HMO
- Oxford Freedom
- Oxford Liberty
- Medicare Managed Care
- Medicaid (Community Plan)
- Medicare Managed Care
- Special Needs
- SelectHealth
- Medicaid Managed Care
- Medicare Managed Care
- World Trade Center Health Plan
About Mary E Callahan, MD
Dr. Callahan is an Assistant Professor of Medicine at Columbia University Medical Center. She received her medical degree from Rush Medical College and completed residency training in Internal Medicine at Tulane University School of Medicine. She completed her Hospice and Palliative Medicine fellowship at the University of Pittsburgh Medical Center in 2018. She also received a Master's Degree in Medical Education from the University of Pittsburgh.
Dr. Callahan's clinical time is spent on the inpatient palliative care service at NewYork-Presbyterian/Columbia University Irving Medical Center and providing outpatient palliative care services at Herbert Irving Cancer Center. Her academic interests are focused on teaching communication and primary palliative care skills.
Board Certifications
LEADERSHIP, TITLES & POSITIONS
- Assistant Professor of Medicine at CUMC
HOSPITAL AFFILIATIONS
- NewYork-Presbyterian / Columbia University Irving Medical Center



