Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Mary S Mazanec, NP

Q: What is the NPI number for Mary Mazanec?

The National Provider Identifier (NPI) for Mary Mazanec is 1003974585, a Type 1 (individual) record in the CMS NPPES registry.

Pediatric Nurse Practitioner in Norwell, MA · enumerated 2006.

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

National Provider Identifier

1003974585

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Registry record

Entity type Individual (Type 1)

Name Ms. Mary S Mazanec

Credential NP

Sex Female

Practice address 75 Washington Street, Norwell, MA, 02061

Phone (781) 878-5200

Fax (781) 878-3989

Enumeration date Dec 5, 2006

Last updated in NPPES Feb 10, 2011

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 263381 (MA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
042297845	Other	MA	GREAT WEST HEALTH CARE
NP5514	Other	MA	MEDICARE
042297845	Other	MA	PHCS
042297845	Other	-	MULTI-PLAN
0710661	Medicaid	MA	-
121285	Other	MA	FALLON
042297845	Other	MA	TRICARE
NP9628	Other	MA	BCBSMA

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mary Mazanec practice?

The practice location on file with NPPES is in Norwell, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mary Mazanec?

The National Provider Identifier (NPI) for Mary Mazanec is 1003974585, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Veronica Vedensky Internal Medicine Physician · Norwell, MA NPI 1538140579 Satoko Porter Sports Medicine (Preventive Medicine) Physician · Norwell, MA NPI 1275518730 Andrea Miller Nurse Practitioner · Norwell, MA NPI 1942313069 Hee Jin Kim Nutritionist · Norwell, MA NPI 1417288903

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-10.