Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Robert O Butler, LCSW

Clinical Social Worker in Petaluma, CA · enumerated 2005.

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

National Provider Identifier

1093718454

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Registry record

Entity type Individual (Type 1)

Name Mr. Robert O Butler

Credential LCSW

Sex Male

Practice address 40 4th St Ste 224, Petaluma, CA, 94952

Phone (707) 241-3003

Enumeration date May 31, 2005

Last updated in NPPES May 11, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS7338 (CA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
FHC03887F	Medicaid	CA	-
1356344758	Medicaid	CA	-
1598786352	Medicaid	CA	-
FHC70957F	Medicaid	CA	-

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 Robert Butler's NPI record?

Cross-check NPI 1093718454 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1093718454 active?

Yes, as of the latest NPPES snapshot, NPI 1093718454 is active (record last updated 2025-05-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-11.