Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilyn Hallowell, LISW

Social Worker in Westerville, OH · enumerated 2006.

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

National Provider Identifier

1699796573

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Registry record

Entity type Individual (Type 1)

Name Marilyn Hallowell

Credential LISW

Sex Female

Practice address 774 Park Meadow Rd, Westerville, OH, 43081

Phone (614) 882-9338

Fax (614) 882-3401

Enumeration date Jul 23, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License I0008147 (OH) 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

Where does Marilyn Hallowell practice?

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

What is the NPI number for Marilyn Hallowell?

The National Provider Identifier (NPI) for Marilyn Hallowell is 1699796573, a Type 1 (individual) record in the CMS NPPES registry.

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