Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Apostolos Kontzias, MD

Rheumatology Physician in East Setauket, NY · enumerated 2010 · practices at Dialysis Clinic Inc..

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

National Provider Identifier

1780915447

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Registry record

Entity type Individual (Type 1)

Name Dr. Apostolos Kontzias

Credential MD

Sex Male

Practice address 26 Research Way, East Setauket, NY, 11733

Phone (631) 444-0580

Fax (631) 444-7502

Enumeration date Jan 20, 2010

Last updated in NPPES Jun 26, 2018

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 35120396 (OH) Secondary

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 35120396 (OH) 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
0079073	Medicaid	OH	-

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 Apostolos Kontzias practice?

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

What is the NPI number for Apostolos Kontzias?

The National Provider Identifier (NPI) for Apostolos Kontzias is 1780915447, 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 2018-06-26.