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KONSTANTINOS VLACHONASSIOS MD INC
NPI 1851429260
Internal Medicine - Cardiovascular Disease in Long Beach, CA

Active since February 28, 2007
3300 E SOUTH STREET, SUITE 301, LONG BEACH, CA 90805(562) 622-9500(562) 622-9513 Get Directions Write a Review

NPPES record last updated: December 12, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Konstantinos Vlachonassios Md Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KONSTANTINOS VLACHONASSIOS MD INC (NPI 1851429260) is a healthcare organization registered as a cardiovascular disease in Long Beach, California and active in the NPI registry since February 2007. The organization lists Konstantinos Vlachonassios, President, as its authorized official.

NPPES Registry Identity

NPI1851429260
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameKONSTANTINOS VLACHONASSIOS MD INC
Location Address3300 E SOUTH STREET, SUITE 301Long Beach, CA 90805
Mailing Address19051 Goldenwest St, Suite 106321Huntington Beach, CA 92648-2155 · (562) 622-9500 · Fax (562) 622-9513
Phone(562) 622-9500
Fax(562) 622-9513
Organization SubpartNo
Authorized OfficialKonstantinos VlachonassiosPresident · (562) 622-9500
Enumeration DateFebruary 28, 2007
Last NPPES UpdateDecember 12, 2024
NPPES CertifiedDecember 12, 2024
✔ NPI 1851429260 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
3300 E SOUTH STREET, Long Beach, CA 90805
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Konstantinos Vlachonassios Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Konstantinos Vlachonassios MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Konstantinos Vlachonassios, M.D.
Cardiovascular Disease (Cardiology)
NPI 1851473003
3300 E SOUTH ST STE 301
Lakewood, CA 90805
(562) 622-9500
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Konstantinos Vlachonassios MD Inc's NPI number?

The NPI number for Konstantinos Vlachonassios MD Inc is 1851429260. It was assigned to this organization in the NPPES registry on February 28, 2007.

Where is Konstantinos Vlachonassios MD Inc located?

Konstantinos Vlachonassios MD Inc is located at 3300 E South Street Suite 301, Long Beach, CA 90805. The listed phone number is (562) 622-9500.

What is Konstantinos Vlachonassios MD Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Konstantinos Vlachonassios MD Inc enrolled in Medicare?

Yes. Konstantinos Vlachonassios MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Konstantinos Vlachonassios MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Cardiovascular Disease (Cardiology)) reassigns their Medicare billing to Konstantinos Vlachonassios MD Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Konstantinos Vlachonassios MD Inc was last updated on December 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.