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

Alexander Dorrough, DDS CAS

Dentist in Hawthorne, NY · enumerated 2020.

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

National Provider Identifier

1821612201

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Registry record

Entity type Individual (Type 1)

Name Alexander Dorrough

Credential DDS CAS

Sex Male

Practice address Hawthorne, NY, 10532

Phone (914) 594-2700

Enumeration date Jun 2, 2020

Last updated in NPPES May 7, 2024

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 062045 (NY) 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 Alexander Dorrough practice?

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

What is the NPI number for Alexander Dorrough?

The National Provider Identifier (NPI) for Alexander Dorrough is 1821612201, 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 2024-05-07.