NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Corwyn Alfred Mosiman, O.D.

Optometrist in Watsonville, CA · enumerated 2005.

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

National Provider Identifier

1689674145

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Registry record

Entity type Individual (Type 1)
Name Dr. Corwyn Alfred Mosiman
Credential O.D.
Sex Male
Practice address Watsonville, CA, 95076
Phone (831) 724-1063
Fax (831) 724-1067
Enumeration date Jul 27, 2005
Last updated in NPPES Aug 2, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Primary
152WC0802X Corneal and Contact Management Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
152WP0200X Pediatric Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
152WS0006X Sports Vision Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
152WV0400X Vision Therapy Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
152WX0102X Occupational Vision Optometrist Eye and Vision Services Providers · License OPT 7532 TPA (CA) Secondary
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
1396787214 Other CA GROUP NPI

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.

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Frequently asked questions

Is NPI 1689674145 active?
Yes, as of the latest NPPES snapshot, NPI 1689674145 is active (record last updated 2011-08-02).
How do I verify Corwyn Mosiman's NPI record?
Cross-check NPI 1689674145 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-02.