Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Gregory J Oleyourryk, MD

Urology Physician in Rochester, NY · enumerated 2006 · practices at Rochester Urology Group, Pllc.

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

National Provider Identifier

1811912959

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Registry record

Entity type Individual (Type 1)

Name Mr. Gregory J Oleyourryk

Credential MD

Sex Male

Practice address 2615 Culver Rd, Suite 100, Rochester, NY, 14609

Phone (585) 336-5320

Fax (585) 336-9114

Enumeration date Jul 12, 2006

Last updated in NPPES Jan 12, 2023

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 205249 (NY) 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
2140687	Medicaid	NY	-

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.

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Frequently asked questions

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.

What specialty is Gregory Oleyourryk?

Gregory Oleyourryk is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-12.