Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Demetrios James Tzimas, M.D.

Gastroenterology Physician in Huntington, NY · enumerated 2009.

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

National Provider Identifier

1568605152

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Registry record

Entity type Individual (Type 1)

Name Dr. Demetrios James Tzimas

Credential M.D.

Sex Male

Practice address 195 E Main St Ste B, Huntington, NY, 11743

Phone (631) 549-8181

Fax (631) 385-8280

Enumeration date Apr 12, 2009

Last updated in NPPES Nov 3, 2020

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 260464 (NY) Primary

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

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 Demetrios Tzimas?

Demetrios Tzimas is registered in NPPES with the primary taxonomy of Gastroenterology Physician. 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-03.