Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Maria J Brennan, APRN

Adult Health Nurse Practitioner in Brooklyn, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538125455

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Registry record

Entity type Individual (Type 1)

Name Mrs. Maria J Brennan

Credential APRN

Sex Female

Practice address 63 Canterbury Rd, Windham Urology Group, Brooklyn, CT, 06234

Phone (860) 412-0491

Fax (860) 412-0496

Enumeration date Apr 21, 2006

Last updated in NPPES Oct 12, 2017

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 001754 (CT) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
00419867900	Other	CT	BLUECARE FAMILY PLAN
500000089	Medicaid	CT	-
004198679	Medicaid	CT	-
2V4032	Other	CT	HEALTHNET OF CT
P2971942	Other	CT	OXFORD HEALTH PLAN
40000175CT01	Other	CT	ANTHEM BC/BS

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Maria Brennan?

Maria Brennan is registered in NPPES with the primary taxonomy of Adult Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Brian Mcleod Urology Physician · Brooklyn, CT NPI 1447255963 Joseph Alessandro Family Medicine Physician · Brooklyn, CT NPI 1902964414 Windham Urology Group PC Urology Physician · Brooklyn, CT NPI 1225235757 Physician Services of Northeast Connecticut, LLC Family Medicine Physician · Brooklyn, CT NPI 1841437456

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-12.