Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Greig

Behavior Analyst in Worcester, MA · enumerated 2016 · practices at Lake Avenue Recovery, LLC.

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

National Provider Identifier

1336693563

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Registry record

Entity type Individual (Type 1)

Name Daniel Greig

Sex Male

Practice address 425 Lake Ave N, Worcester, MA, 01605

Phone (617) 402-5444

Enumeration date Aug 4, 2016

Last updated in NPPES Jan 29, 2025

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License LABA10000956 (MA) 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 Daniel Greig?

Daniel Greig 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 2025-01-29.