Dr. William Fessler DDS
About this NPIWhat this record shows.
NPI 1124187539 is registered to Dr. William Fessler DDS, a Dentist practising at 116 East Avenue in Norwalk, Connecticut. Dentist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. William Fessler DDS has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- 7790· Issued by DELLTE DENTAL OF NJ
- 698204· Issued by UNITED CONCORDIA
Source: NPPES public registry.
Medicare enrollment
This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Order and Referring Only
- I20201125001606DentistCT
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. William Fessler DDS accepts. To confirm in-network status with your specific health plan, contact Dr. William Fessler DDS directly at (203) 838-3939.
Frequently asked
Yes. NPI 1124187539 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Dentist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (203) 838-3939.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. William Fessler DDS is a Type-1 individual NPI.