Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Jennifer Guzi Casolaro, NP

Family Nurse Practitioner in Dunn Loring, VA · enumerated 2007.

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

National Provider Identifier

1578767885

Verified

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Registry record

Entity type Individual (Type 1)

Name Mrs. Jennifer Guzi Casolaro

Credential NP

Sex Female

Practice address 8012 Elm Pl, Dunn Loring, VA, 22027

Phone (703) 248-8158

Enumeration date Jun 12, 2007

Last updated in NPPES Jul 12, 2012

Taxonomy & licenses

164W00000X Licensed Practical Nurse Nursing Service Providers · License RN964596 (DC) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 0024168210 (VA) 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

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 Jennifer Casolaro practice?

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

What is the NPI number for Jennifer Casolaro?

The National Provider Identifier (NPI) for Jennifer Casolaro is 1578767885, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-12.