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

Dr. Alan Paul Friedler, DMD

Dentist in Guilford, CT · enumerated 2007 · practices at Guilford Dental Pllc.

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

National Provider Identifier

1659412112

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Registry record

Entity type Individual (Type 1)

Name Dr. Alan Paul Friedler

Credential DMD

Sex Male

Practice address Guilford, CT, 06437

Phone (203) 787-0520

Fax (203) 624-7882

Enumeration date Feb 9, 2007

Last updated in NPPES Sep 7, 2018

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 5430 (CT) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

How do I verify Alan Friedler's NPI record?

Cross-check NPI 1659412112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659412112 active?

Yes, as of the latest NPPES snapshot, NPI 1659412112 is active (record last updated 2018-09-07).

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Melissa Merwin General Practice Dentistry · Guilford, CT NPI 1306302120 Guilford Dental Pllc General Practice Dentistry · Guilford, CT NPI 1447120183

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-07.