Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grayling Ellis Harrison Jr.

Physical Therapist in Millersville, MD · enumerated 2021.

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

National Provider Identifier

1720656960

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Registry record

Entity type Individual (Type 1)

Name Grayling Ellis Harrison Jr.

Sex Male

Practice address 611 Waterwheel Ln, Millersville, MD, 21108

Phone (443) 469-1140

Enumeration date Jun 15, 2021

Last updated in NPPES Aug 1, 2024

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 28447 (MD) Primary

Other identifiers

Identifier	Type	State	Issuer
28447	Other	MD	MARYLAND PT LICENSE #

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

What is the NPI number for Grayling Harrison?

The National Provider Identifier (NPI) for Grayling Harrison is 1720656960, a Type 1 (individual) record in the CMS NPPES registry.

Where does Grayling Harrison practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-01.