Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Dr. Lassa J Frank, O.D.
Optometrist in San Anselmo, CA · enumerated 2006 · practices at Lassa J. Frank, Od, Inc.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1235190208
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 5091080001 | Other | CA | DMERC CIGNA SUPPLIER # |
| 680226455 | Other | CA | VISION SERVICE PLAN ID# |
| 8464TPL | Other | CA | LICENSE NUMBER |
| P00260245 | Other | CA | MEDICARE RAILROAD PIN |
| 0003748569 | Other | CA | CALIFORNIA EMPLOYER ID |
| 680226455 | Other | CA | BLUE CROSS ID NUMBER |
| 680226455 | Other | CA | UNITEDHEALTHCARE ID # |
| 942846602 | Other | CA | FEDERAL ID NUMBER |
| SD0084640 | Other | CA | BLUE SHIELD PIN |
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
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.