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

Elizabeth Guevara, MD

Individual provider Internal Medicine Physician · NPI 1902858756

Elizabeth Guevara, MD practises Hematology in Brooklyn, New York. Qualified in 1979, 47 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 324-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
47
Licensed in
NY
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

240 Willoughby St 5th Fls
Brooklyn, NY 11201 Not confirmed with CMS for 15 years — call before visiting
Phone: (718) 250-6960
Fax: (718) 250-6493
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 167703 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 167703 (NY)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 167703 (NY)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 167703 (NY)

Record details

NPI number1902858756
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 17, 2006
Last updated in NPPESSeptember 23, 2011

Medicare enrollment

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

Medicare specialtyHEMATOLOGY
Also practisesMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 1979 (47 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 324 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients38
Services billed 84 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 Icahn School of Medicine at Mount Sinai

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 324 clinicians in the practice; 12 are shown here.

Other providers in Brooklyn