Leslie Grenville

Leslie Grenville is a Behavior Analyst provider (Behavior Analyst) practicing in Sumter, SC, registered in the NPPES registry with NPI 1851850317 since 2019.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1851850317
Entity type	Individual (Type 1)
Name	Leslie Grenville
Sex	Female
Practice address	Sumter, SC, 29154
Phone	8034064433
Enumeration date	2019-03-14
Last updated in NPPES	2023-10-10

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103K00000X	Behavior Analyst	Primary	1-23-65220	SC

Copy-ready billing details

Provider: Leslie Grenville
NPI: 1851850317
Taxonomy: 103K00000X (Behavior Analyst)
Address: Sumter, SC, 29154

Verify this record

Cross-check NPI 1851850317 against the authoritative CMS record: view Leslie Grenville on the official NPPES registry .

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 or validate an NPI number.

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 Leslie Grenville?

Leslie Grenville 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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-10-10.