Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Paul Knudsen, ABOC, NCLE
Optician in Roseville, MN · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1851157184
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Registry record
Entity type Individual (Type 1)
Name Gregory Paul Knudsen
Credential ABOC, NCLE
Sex Male
Practice address 1960 Twin Lakes Pkwy, Roseville, MN, 55113
Phone (612) 788-1549
Fax (651) 633-9761
Enumeration date Feb 23, 2024
Last updated in NPPES Feb 23, 2024
Taxonomy & licenses
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 Knudsen's NPI record?
Cross-check NPI 1851157184 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1851157184 active?
Yes, as of the latest NPPES snapshot, NPI 1851157184 is active (record last updated 2024-02-23).
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-23.