Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Drs. Marc Lewis & Thomas Niederhelman LLC

General Practice Dentistry in Coshocton, OH · enumerated 2007 · authorized official Marc Lewis, President.

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

National Provider Identifier

1588795884

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Registry record

Entity type Organization (Type 2)

Legal business name Drs. Marc Lewis & Thomas Niederhelman LLC

Practice address 713 Main St, Coshocton, OH, 43812

Phone (740) 622-4421

Fax (740) 622-0820

Enumeration date Mar 8, 2007

Last updated in NPPES Jan 19, 2011

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers · License 21427 (OH) Primary

Authorized official

Name Marc Lewis

Title President

Phone (740) 622-4421

Other identifiers

Identifier	Type	State	Issuer
2634546	Medicaid	OH	-

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 is Drs. Marc Lewis & Thomas Niederhelman LLC located?

The practice location on file with NPPES is in Coshocton, OH.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-01-19. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Thomas Niederhelman General Practice Dentistry · Coshocton, OH NPI 1144333527 Frederick Freytag General Practice Dentistry · Coshocton, OH NPI 1245405679

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-19.