Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory L Ellis, OD
Optometrist in Boulder, CO · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629105622
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Gregory L Ellis
Credential OD
Sex Male
Practice address 580 Mohawk Dr, Boulder, CO, 80303
Phone (303) 338-4545
Enumeration date Feb 27, 2007
Last updated in NPPES Jun 7, 2021
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 |
|---|---|---|---|
| 09755012 | Medicaid | CO | - |
| 014851 | Other | - | KAISER-COMMERCIAL NUMBER |
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 Ellis's NPI record?
Cross-check NPI 1629105622 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1629105622 active?
Yes, as of the latest NPPES snapshot, NPI 1629105622 is active (record last updated 2021-06-07).
Other providers at this practice address
Browse all → Eileen Bickford Family Medicine Physician · Boulder, CO NPI 1376529941 Nicole Silver Internal Medicine Physician · Boulder, CO NPI 1184642209 William Hazell Medical Physician Assistant · Boulder, CO NPI 1467463729 Kaiser Foundation Health Plan of Colorado Multi-Specialty Clinic/Center · Boulder, CO NPI 1073627360 Xochitl Ashpole Physical Therapist · Boulder, CO NPI 1487768099 Scott Clemensen Family Medicine Physician · Boulder, CO NPI 1104932888 Emily Warm Pediatrics Physician · Boulder, CO NPI 1073623856 Sepeideh Nouhi Family Medicine Physician · Boulder, CO NPI 1689757213
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-07.