Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marjorie R Mascarinas, RN, FNP

Family Nurse Practitioner in Arlington, VA · enumerated 2007.

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

National Provider Identifier

1174713663

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Registry record

Entity type Individual (Type 1)

Name Marjorie R Mascarinas

Credential RN, FNP

Sex Female

Practice address 3133 Lee Hwy, Arlington, VA, 22201

Phone (703) 522-0260

Enumeration date Jul 31, 2007

Last updated in NPPES Apr 10, 2014

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 0017139642 (VA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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 Marjorie Mascarinas practice?

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

What is the NPI number for Marjorie Mascarinas?

The National Provider Identifier (NPI) for Marjorie Mascarinas is 1174713663, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-10.