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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Francis Siew Tan

Licensed Vocational Nurse in Alameda, CA · enumerated 2026 · practices at Merlion Health LLC.

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

National Provider Identifier

1790603637

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Registry record

Entity type Individual (Type 1)
Name Francis Siew Tan
Sex Male
Practice address 1423 Webster St, Alameda, CA, 94501
Phone (510) 846-6857
Enumeration date Jul 8, 2026
Last updated in NPPES Jul 8, 2026

Taxonomy & licenses

164X00000X Licensed Vocational Nurse Nursing Service Providers · License VN742612 (CA) Primary

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 1790603637 active?
Yes, as of the latest NPPES snapshot, NPI 1790603637 is active (record last updated 2026-07-08).
How do I verify Francis Tan's NPI record?
Cross-check NPI 1790603637 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 2026-07-08.