NPI Portal NPI Lookup & Verification

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

Dr. Mark Langley Mcinnis, DMD

Dentist in Clemson, SC · enumerated 2006.

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

National Provider Identifier

1184682585

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark Langley Mcinnis
Credential DMD
Sex Male
Practice address Clemson, SC, 29631
Phone (864) 654-7534
Fax (864) 654-4830
Enumeration date May 3, 2006
Last updated in NPPES Jan 11, 2018

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

Taxonomy & licenses

1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License 3514 SPEC 0504 (SC) Secondary
1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License 0504 (SC) Secondary
122300000X Dentist Dental Providers · License 3514 (SC) Primary
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mark Mcinnis practice?
The practice location on file with NPPES is in Clemson, SC. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Mcinnis?
The National Provider Identifier (NPI) for Mark Mcinnis is 1184682585, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-11.