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

Mrs. Marie Michelle Mcgrellis, M.ED., BCBA

Behavior Analyst in Frederica, DE · enumerated 2010.

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

National Provider Identifier

1013221795

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marie Michelle Mcgrellis

Credential M.ED., BCBA

Sex Female

Practice address Frederica, DE, 19946

Phone (302) 335-3199

Enumeration date Aug 4, 2010

Last updated in NPPES Aug 4, 2010

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

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Marie Mcgrellis practice?

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

What is the NPI number for Marie Mcgrellis?

The National Provider Identifier (NPI) for Marie Mcgrellis is 1013221795, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-04.