Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cassidy Ann Guida, DO

Geriatric Medicine (Internal Medicine) Physician in Southampton, NY · enumerated 2021.

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

National Provider Identifier

1831775261

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Registry record

Entity type Individual (Type 1)

Name Cassidy Ann Guida

Credential DO

Sex Female

Practice address 240 Meeting House Ln, Southampton, NY, 11968

Phone (631) 726-8200

Enumeration date Mar 24, 2021

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 2024-01371 (NC) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 Cassidy Guida practice?

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

What is the NPI number for Cassidy Guida?

The National Provider Identifier (NPI) for Cassidy Guida is 1831775261, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.