Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory S Koenig, O.D.
Optometrist in Fernley, NV · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255301388
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory S Koenig
Credential O.D.
Sex Male
Practice address 415 Us Highway 95a S, Suite 101, Fernley, NV, 89408
Phone (775) 575-1966
Fax (775) 575-1967
Enumeration date Jan 23, 2006
Last updated in NPPES Jun 10, 2008
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 002501100 | Medicaid | NV | - |
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.
Frequently asked questions
How do I verify Gregory Koenig's NPI record?
Cross-check NPI 1255301388 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1255301388 active?
Yes, as of the latest NPPES snapshot, NPI 1255301388 is active (record last updated 2008-06-10).
Other providers at this practice address
Browse all → Carl Robertson Optometrist · Fernley, NV NPI 1659341782 Robertson & Koenig, Ltd Optometrist · Fernley, NV NPI 1699745059 Fae of Fernley, Inc. Assisted Living Facility (Behavioral Disturbances) · Fernley, NV NPI 1912090721 Kristina Petty Optometrist · Fernley, NV NPI 1538479365 Pam Ramirez Psychiatric/Mental Health Registered Nurse · Fernley, NV NPI 1679883805 Stephanie Lashuk Rehabilitation Counselor · Fernley, NV NPI 1376845388 Nancy Russell Case Manager/Care Coordinator · Fernley, NV NPI 1750683769 Tamara Musser Addiction (Substance Use Disorder) Counselor · Fernley, NV NPI 1891132163
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-10.