Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Theresa Abdul-Massih, FNP

Individual provider Nurse Practitioner · NPI 1619495942

Theresa Abdul-Massih, FNP is a Nurse Practitioner in New York, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2017
Specialties on file
2
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

241 W 57th St
New York, NY 10019-2121
Phone: (866) 389-2727
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence F3421381 (NY)
Nurse Practitioner Taxonomy 363L00000X · Licence F342138-1 (NY)

Record details

NPI number1619495942
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedSeptember 7, 2017
Last updated in NPPESSeptember 22, 2017

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 patients219
Services billed 2,767 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

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