Dr. Christopher Brennan M.D.
About this NPIWhat this record shows.
NPI 1174771323 is registered to Dr. Christopher Brennan M.D., a Internal Medicine practising at 1000 Montauk Highway, Hospitalist Department 3rd Floor in West Islip, New York. Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties. Dr. Christopher Brennan M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2008.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20110801000764Internal MedicineRI
- I20141208001067HospitalistNY
Source: CMS PECOS public enrollment file.
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. Christopher Brennan M.D. accepts. To confirm in-network status with your specific health plan, contact Dr. Christopher Brennan M.D. directly at (631) 376-3610.
Frequently asked
Yes. NPI 1174771323 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) 376-3610.
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. Christopher Brennan M.D. is a Type-1 individual NPI.