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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Jillian Marianos, FNP

Family Nurse Practitioner in Arlington, VA · enumerated 2022 · practices at Virginia Hospital Center Physician Group LLC.

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

National Provider Identifier

1275266876

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Registry record

Entity type Individual (Type 1)
Name Jillian Marianos
Credential FNP
Sex Female
Practice address Arlington, VA, 22205
Phone (703) 717-7780
Enumeration date Jul 1, 2022
Last updated in NPPES Aug 11, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 0024184708 (VA) Primary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP 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.

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Frequently asked questions

What is the NPI number for Jillian Marianos?
The National Provider Identifier (NPI) for Jillian Marianos is 1275266876, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jillian Marianos practice?
The practice location on file with NPPES is in Arlington, VA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-11.