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

Dr. Mary Margaret Brennan, DNP, ACNP-BC, GNP-BC

Individual provider Adult Health Nurse Practitioner · NPI 1437405016

Dr. Mary Margaret Brennan, DNP, ACNP-BC, GNP-BC is an Adult Health Nurse Practitioner in New York, New York. Licensed in New York. Registered with an NPI since 2012.

Licensed in
NY
In the registry since
2012
What do these letters mean?
DNP — Doctor of Nursing Practice
The highest clinical degree in nursing.

See every abbreviation used in this directory →

Practice location Address checks out

1 Gustave L Levy Pl Ofc 721
New York, NY 10029-6574
Phone: (212) 241-6261
Fax: (212) 241-9029
Show map & directions

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

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence 300637 (NY)

Record details

NPI number1437405016
Entity typeIndividual (Type 1)
GenderFemale
Credentials DNP , ACNP-BC , GNP-BC
Sole proprietorNo
NPI enumeratedAugust 1, 2012
Last updated in NPPESAugust 1, 2012

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