Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Giorgos Hadjivassiliou, MBBS

Internal Medicine Physician in Alexandria, VA · enumerated 2014.

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

National Provider Identifier

1215342621

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Registry record

Entity type Individual (Type 1)

Name Dr. Giorgos Hadjivassiliou

Credential MBBS

Sex Male

Practice address 6677 Richmond Hwy, Alexandria, VA, 22306

Phone (703) 535-5568

Enumeration date Jun 24, 2014

Last updated in NPPES Sep 13, 2019

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 0101267728 (VA) Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 36128 (AL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0101267728 (VA) 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

Where does Giorgos Hadjivassiliou practice?

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

What is the NPI number for Giorgos Hadjivassiliou?

The National Provider Identifier (NPI) for Giorgos Hadjivassiliou is 1215342621, 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 2019-09-13.