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

Dr. Carl Frederick Ern, DDS

General Practice Dentistry in Brewster, NY · enumerated 2007.

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

National Provider Identifier

1629294111

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Registry record

Entity type Individual (Type 1)
Name Dr. Carl Frederick Ern
Credential DDS
Sex Male
Practice address Brewster, NY, 10509
Phone (845) 279-3720
Fax (845) 279-8144
Enumeration date Apr 17, 2007
Last updated in NPPES Apr 7, 2020

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

Taxonomy & licenses

1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License 035269 (NY) Secondary
332BC3200X Customized Equipment (DME) Suppliers Secondary
1223G0001X General Practice Dentistry Dental Providers · License 035269 (NY) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Where does Carl Ern practice?
The practice location on file with NPPES is in Brewster, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Carl Ern?
The National Provider Identifier (NPI) for Carl Ern is 1629294111, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-07.