John Oppenheimer, M.D., PLLC
About this NPIWhat this record shows.
NPI 1780956441 is registered to John Oppenheimer, M.D., PLLC, a healthcare organisation classified as "Geriatric Medicine (Internal Medicine) Physician" and located at 60 Bay St in Sag Harbor, New York. The organisation's authorised official is John Oppenheimer. The organisation has been enumerated in the NPI registry since 2012.
Your brand here.
Medicare enrollment
This provider holds a Medicare enrollment 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.
Part B Supplier
- O20120320000405Clinic/Group PracticeNY
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 John Oppenheimer, M.D., PLLC accepts. To confirm in-network status with your specific health plan, contact John Oppenheimer, M.D., PLLC directly at (621) 725-4600.
Frequently asked
Yes. NPI 1780956441 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Geriatric Medicine (Internal Medicine) Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
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 (621) 725-4600.
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. John Oppenheimer, M.D., PLLC is a Type-2 organisational NPI.