Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark A Demoss, MD
Pediatrics Physician in Greer, SC · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538172960
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark A Demoss
Credential MD
Sex Male
Practice address 501c Memorial Dr Ext, Greer, SC, 29651
Phone (864) 877-1220
Fax (864) 877-7731
Enumeration date Aug 15, 2006
Last updated in NPPES Jun 5, 2012
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 562212236 | Other | - | CHAMPUS |
| GP2981 | Medicaid | SC | - |
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.
Frequently asked questions
What is the NPI number for Mark Demoss?
The National Provider Identifier (NPI) for Mark Demoss is 1538172960, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Demoss practice?
The practice location on file with NPPES is in Greer, SC. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-05.