NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandra Theodora Tsitsiringos, TRAINEE

Student in an Organized Health Care Education/Training Program in San Mateo, CA · enumerated 2024.

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

National Provider Identifier

1891538518

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Alexandra Theodora Tsitsiringos
Credential TRAINEE
Sex Female
Practice address 2000 Alameda De Las Pulgas Ste 200, San Mateo, CA, 94403
Enumeration date Jun 18, 2024
Last updated in NPPES Jun 18, 2024

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Primary

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 specialty is Alexandra Tsitsiringos?
Alexandra Tsitsiringos is registered in NPPES with the primary taxonomy of Student in an Organized Health Care Education/Training Program. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-18.