Mr. Gregory Zanieski MD
About this NPIWhat this record shows.
NPI 1235320474 is registered to Mr. Gregory Zanieski MD, a Surgical Oncology Physician practising at Smilow Cancer Hospital At Yale-New Haven, 35 Park Street, 8th Floor Clinic in New Haven, Connecticut. Surgical Oncology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Mr. Gregory Zanieski MD has been enumerated in the National Provider Identifier (NPI) registry since 2007.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Medicaid
- 03227869NY
Source: NPPES public registry.
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.
Practitioner
- I20190729003574General SurgeryCT
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 Mr. Gregory Zanieski MD accepts. To confirm in-network status with your specific health plan, contact Mr. Gregory Zanieski MD directly at (203) 785-3577.
Frequently asked
Yes. NPI 1235320474 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Surgical Oncology 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 (203) 785-3577.
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. Gregory Zanieski MD is a Type-1 individual NPI.