Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Stephen, MD
Specialist in Levittown, NY · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790772408
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Registry record
Entity type Individual (Type 1)
Name Mark Stephen
Credential MD
Sex Male
Practice address 2920 Hempstead Tpke, Levittown, NY, 11756
Phone (516) 735-4048
Fax (516) 731-1945
Enumeration date Sep 29, 2005
Last updated in NPPES Sep 18, 2014
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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.
Frequently asked questions
What is the NPI number for Mark Stephen?
The National Provider Identifier (NPI) for Mark Stephen is 1790772408, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Stephen practice?
The practice location on file with NPPES is in Levittown, NY. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-18.