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

Konstantinos Vlachonassios, M.D.

Cardiovascular Disease Physician in Lakewood, CA · enumerated 2006.

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

National Provider Identifier

1851473003

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Registry record

Entity type Individual (Type 1)

Name Konstantinos Vlachonassios

Credential M.D.

Sex Male

Practice address Lakewood, CA, 90805

Phone (562) 622-9500

Fax (562) 622-9513

Enumeration date Oct 19, 2006

Last updated in NPPES Dec 12, 2024

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

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License A52738 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A5278380	Medicaid	CA	-

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 Konstantinos Vlachonassios practice?

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

What is the NPI number for Konstantinos Vlachonassios?

The National Provider Identifier (NPI) for Konstantinos Vlachonassios is 1851473003, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-12.