Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Kathryn L Regan, OD, MS
Optometrist in Portland, ME · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043985914
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Registry record
Entity type Individual (Type 1)
Name Dr. Kathryn L Regan
Credential OD, MS
Sex Female
Practice address 295 Park Ave, Portland, ME, 04102
Phone (207) 874-2141
Fax (207) 874-2164
Enumeration date Aug 12, 2021
Last updated in NPPES Apr 28, 2025
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 |
|---|---|---|---|
| OPT-002524 | Other | AZ | AZ STATE LICENSE ISSUED BY BOARD OF OPTOMETRY |
| OPT.0003866 | Other | CO | CO STATE LICENSE ISSUED BY DORA |
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
What specialty is Kathryn Regan?
Kathryn Regan is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-28.