NPI Portal NPI Lookup & Verification

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

Dr. Mark J Janosky, D.M.D.

Dentist in Myrtle Beach, SC · enumerated 2006.

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

National Provider Identifier

1811943798

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark J Janosky
Credential D.M.D.
Sex Male
Practice address Myrtle Beach, SC, 29579
Phone (843) 663-8000
Fax (843) 663-8123
Enumeration date May 25, 2006
Last updated in NPPES Feb 10, 2020

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 7933 (NC) Secondary
122300000X Dentist Dental Providers · License 4418 (SC) Primary
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

Other identifiers

Identifier Type State Issuer
9021P Other NC BLUECROSS BLUESHIELD
5900834 Medicaid NC -

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 is the NPI number for Mark Janosky?
The National Provider Identifier (NPI) for Mark Janosky is 1811943798, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Janosky practice?
The practice location on file with NPPES is in Myrtle Beach, SC. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-10.