Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dierdre A Gilliam, MSN, RN, PHN

Administrator Registered Nurse in Woodland, CA · enumerated 2007.

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

National Provider Identifier

1205984010

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Registry record

Entity type Individual (Type 1)

Name Dierdre A Gilliam

Credential MSN, RN, PHN

Sex Female

Practice address 137 N Cottonwood St, Ste 2400, Woodland, CA, 95695

Phone (530) 666-8558

Fax (530) 666-7447

Enumeration date Jan 8, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

163WA2000X Administrator Registered Nurse Nursing Service Providers · License 607502 (CA) Primary

163WC1500X Community Health Registered Nurse Nursing Service Providers · License 607502 (CA) Secondary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Dierdre Gilliam's NPI record?

Cross-check NPI 1205984010 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1205984010 active?

Yes, as of the latest NPPES snapshot, NPI 1205984010 is active (record last updated 2025-09-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.