Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Stanley Herbert, MS

Genetic Counselor (M.S.) in Monrovia, CA · enumerated 2007.

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

National Provider Identifier

1689867616

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Registry record

Entity type Individual (Type 1)

Name Mr. William Stanley Herbert

Credential MS

Sex Male

Practice address 655 E Huntington Dr, Monrovia, CA, 91016

Phone (626) 471-7517

Fax (626) 471-7560

Enumeration date Aug 22, 2007

Last updated in NPPES Aug 22, 2007

Taxonomy & licenses

170300000X Genetic Counselor (M.S.) Other Service Providers 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

How do I verify William Herbert's NPI record?

Cross-check NPI 1689867616 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689867616 active?

Yes, as of the latest NPPES snapshot, NPI 1689867616 is active (record last updated 2007-08-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-22.