Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Robert W Herndon, LCSW

Clinical Social Worker in San Marcos, TX · enumerated 2005.

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

National Provider Identifier

1851395552

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Registry record

Entity type Individual (Type 1)

Name Robert W Herndon

Credential LCSW

Sex Male

Practice address San Marcos, TX, 78666

Phone (512) 396-8540

Fax (512) 396-5680

Enumeration date Jun 9, 2005

Last updated in NPPES Jul 3, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 001911 (TX) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 10538 (TX) 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
00S08E	Other	TX	BCBS
063960101	Medicaid	TX	-

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

What is the NPI number for Robert Herndon?

The National Provider Identifier (NPI) for Robert Herndon is 1851395552, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Herndon practice?

The practice location on file with NPPES is in San Marcos, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Stanley Harlan Professional Counselor · San Marcos, TX NPI 1689678302

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-03.