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

Mrs. Marilyn R Gebel-Sitts, LCSW

Clinical Social Worker in Fort Mill, SC · enumerated 2005.

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

National Provider Identifier

1437135639

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marilyn R Gebel-Sitts

Credential LCSW

Sex Female

Practice address Fort Mill, SC, 29708

Phone (703) 728-4095

Fax (703) 642-6082

Enumeration date Dec 20, 2005

Last updated in NPPES Nov 7, 2024

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LC300051 (DC) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 00816 (MD) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 0904000774 (VA) 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
89 0983 1	Medicaid	VA	-

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

Where does Marilyn Gebel-Sitts practice?

The practice location on file with NPPES is in Fort Mill, SC. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marilyn Gebel-Sitts?

The National Provider Identifier (NPI) for Marilyn Gebel-Sitts is 1437135639, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-07.