Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

O Gregory Zazulak, MD, PC

Q: What type of organization is O Gregory Zazulak, MD, PC?

O Gregory Zazulak, MD, PC is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

Ophthalmology Physician in Rochester, NY · enumerated 2008 · authorized official Oleh Zazulak, President.

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

National Provider Identifier

1366611709

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Registry record

Entity type Organization (Type 2)

Legal business name O Gregory Zazulak, MD, PC

Other name <Unavail>

Practice address 890 Westfall Rd, Suite E, Rochester, NY, 14618

Phone (585) 473-6700

Enumeration date Feb 28, 2008

Last updated in NPPES Feb 16, 2010

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Primary

261QM2500X Medical Specialty Clinic/Center Ambulatory Health Care Facilities · License 178871 (NY) Secondary

Authorized official

Name Oleh Zazulak

Title President

Phone (585) 473-6700

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 type of organization is O Gregory Zazulak, MD, PC?

O Gregory Zazulak, MD, PC is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-16.