Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arnold Leonard Posada

Registered Nurse in Santa Rosa, CA · enumerated 2013 · practices at County of Sonoma.

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

National Provider Identifier

1649616863

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Registry record

Entity type Individual (Type 1)

Name Arnold Leonard Posada

Sex Male

Practice address 3725 Westwind Blvd, Santa Rosa, CA, 95403

Phone (707) 565-5736

Enumeration date May 14, 2013

Last updated in NPPES Aug 18, 2014

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 804779 (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 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.

What specialty is Arnold Posada?

Arnold Posada is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-18.