Dr. Mark Xuereb MD
About this NPIWhat this record shows.
NPI 1114083292 is registered to Dr. Mark Xuereb MD, a Internal Medicine practising at 50 Route 25a in Smithtown, New York. Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties. Dr. Mark Xuereb MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. Mark Xuereb MD accepts. To confirm in-network status with your specific health plan, contact Dr. Mark Xuereb MD directly at (631) 862-3890.
Frequently asked
Yes. NPI 1114083292 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (631) 862-3890.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. Mark Xuereb MD is a Type-1 individual NPI.