Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark E Feigen, DMD

Dentist in Norwalk, CT · enumerated 2005.

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

National Provider Identifier

1295723179

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark E Feigen

Credential DMD

Sex Male

Practice address 24 Stevens St, Norwalk Hospital Dental Service, Norwalk, CT, 06850

Phone (203) 852-2146

Fax (203) 855-3521

Enumeration date Oct 13, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License 7175 (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.

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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 Mark Feigen?

Mark Feigen is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.