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About this NPIWhat this record shows.
NPI 1821244336 is registered to Mr. John Papanastassiou M.D., a Specialist practising at 1275 York Avenue in New York, New York. Specialist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Mr. John Papanastassiou M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2008.
Provider type
Individual (Type 1)
Status
Active
Enumerated
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Mr. John Papanastassiou M.D. accepts. To confirm in-network status with your specific health plan, contact Mr. John Papanastassiou M.D. directly at (212) 639-7610.
Frequently asked
Yes. NPI 1821244336 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Specialist 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 (212) 639-7610.
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. Mr. John Papanastassiou M.D. is a Type-1 individual NPI.
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