Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alfonso Lamendola Sitenga, OD

Optometrist in Kenai, AK · enumerated 2021 · practices at Sitenga Eye Associates LLC.

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

National Provider Identifier

1609445451

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Registry record

Entity type Individual (Type 1)

Name Alfonso Lamendola Sitenga

Credential OD

Sex Male

Practice address 115 Bidarka St, Kenai, AK, 99611

Phone (907) 335-3358

Enumeration date Jun 24, 2021

Last updated in NPPES Jun 24, 2021

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 171412 (AK) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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

Is NPI 1609445451 active?

Yes, as of the latest NPPES snapshot, NPI 1609445451 is active (record last updated 2021-06-24).

How do I verify Alfonso Sitenga's NPI record?

Cross-check NPI 1609445451 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Sitenga Eye Associates LLC Ophthalmology Physician · Kenai, AK NPI 1346830403

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-24.