Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandria Tarvainis, DNP, FNP-BC

Nurse Practitioner in Oak Brook, IL · enumerated 2023.

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

National Provider Identifier

1447939822

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Registry record

Entity type Individual (Type 1)

Name Alexandria Tarvainis

Credential DNP, FNP-BC

Sex Female

Practice address 3011 Butterfield Rd Ste 240, Oak Brook, IL, 60523

Phone (630) 348-3840

Enumeration date Jul 13, 2023

Last updated in NPPES Oct 6, 2023

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209024538 (IL) Primary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP 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

What is the NPI number for Alexandria Tarvainis?

The National Provider Identifier (NPI) for Alexandria Tarvainis is 1447939822, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alexandria Tarvainis practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-06.