Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heidi A Llewellyn

Behavior Analyst in Lancaster, OH · enumerated 2012.

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

National Provider Identifier

1801146527

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Registry record

Entity type Individual (Type 1)

Name Heidi A Llewellyn

Sex Female

Practice address 131 W Main St, Lancaster, OH, 43130

Phone (740) 277-6379

Fax (740) 277-6389

Enumeration date Sep 11, 2012

Last updated in NPPES Apr 11, 2017

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License E0500488 (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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Heidi Llewellyn?

Heidi Llewellyn is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-04-11.