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

Hillary Grogan, MS, CCC-SLP

Speech-Language Pathologist in Riverside, CT · enumerated 2024.

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

National Provider Identifier

1598535775

Verified

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Registry record

Entity type Individual (Type 1)

Name Hillary Grogan

Credential MS, CCC-SLP

Sex Female

Practice address Riverside, CT, 06878

Phone (203) 219-2125

Enumeration date Jan 8, 2024

Last updated in NPPES Jan 8, 2024

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

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 12025830 (CT) 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

Is NPI 1598535775 active?

Yes, as of the latest NPPES snapshot, NPI 1598535775 is active (record last updated 2024-01-08).

How do I verify Hillary Grogan's NPI record?

Cross-check NPI 1598535775 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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