Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Elizabeth Callahan, MD

Individual provider Internal Medicine Physician · NPI 1942629803

Mary Elizabeth Callahan, MD is registered under Hospice/Palliative Care in New York, New York. Qualified in 2014, 12 years ago. Practices with Trustees of Columbia University in the City of New York, a 2,250-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York and Pennsylvania.

Years since qualifying
12
Licensed in
NY, PA
In the registry since
2014
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

161 Fort Washington Ave
New York, NY 10032-3729
Phone: (212) 305-7340
Fax: (212) 305-6891
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospice and Palliative Medicine (Internal Medicine) Physician (primary) Taxonomy 207RH0002X · Licence 299233 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD464097 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 299233 (NY)

Record details

NPI number1942629803
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 8, 2014
Last updated in NPPESJuly 2, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPICE/PALLIATIVE CARE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Trustees Of Columbia University In The City Of New York — 2250 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients105
Services billed 262 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Trustees of Columbia University in the City of New York

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2250 clinicians in the practice; 12 are shown here.

Other providers in New York