Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Drs. Marc Lewis & Thomas Niederhelman LLC

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

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

National Provider Identifier

1518090661

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Drs. Marc Lewis & Thomas Niederhelman LLC

Practice address 8459 N Main St, Dayton, OH, 45415

Phone (937) 890-1102

Fax (937) 264-9550

Enumeration date Mar 14, 2007

Last updated in NPPES Mar 3, 2008

Taxonomy & classification

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

Authorized official

Name Marc Lewis

Title President

Phone (937) 890-1102

Other identifiers

Identifier	Type	State	Issuer
2703293	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

What type of organization is Drs. Marc Lewis & Thomas Niederhelman LLC?

Drs. Marc Lewis & Thomas Niederhelman LLC is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-03.