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

Dr. Mark C Lemonnier, D.D.S.

General Practice Dentistry in Frederick, MD · enumerated 2006.

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

National Provider Identifier

1780627778

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark C Lemonnier

Credential D.D.S.

Sex Male

Practice address Frederick, MD, 21703

Phone (301) 663-0811

Enumeration date Jun 14, 2006

Last updated in NPPES Oct 21, 2008

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 11694 (MD) 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

How do I verify Mark Lemonnier's NPI record?

Cross-check NPI 1780627778 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1780627778 active?

Yes, as of the latest NPPES snapshot, NPI 1780627778 is active (record last updated 2008-10-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-21.