FindMyNPI
Medicare enrollment lookup

One provider matched this enrollment ID.

Enrollment ID I20040407000878 resolves to a single NPI record. Open the full profile for complete detail.

Single match found
When an enrollment ID maps to more than one NPI, this page shows a chooser to pick the right provider instead.
WS
NPI · 1235158155 · Active
William Smithy M.D.
Surgical Oncology Physician · East Setauket, New York
Active
NPI
1235158155
Enrollment ID
I20040407000878
Taxonomy
2086X0206X
Type
Practitioner - Colorectal Surgery (proctology)

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

Source: CMS PECOS public enrollment file.

Secondary identifiers

Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.

Other

  • 4515833NY· Issued by AETNA
  • 26E631NY· Issued by EMPIRE BC.BS

Medicaid

Source: NPPES public registry.

ReferenceAbout Medicare Enrollment IDs

A Medicare Enrollment ID (ENRLMT_ID) is a 15-character public identifier assigned by the CMS Provider Enrollment, Chain and Ownership System (PECOS) when a provider, supplier, or organisation enrols in Medicare. Each row reflects one enrolment record: a single NPI can hold multiple enrolments across provider types, states, or supplier categories. Data here is mirrored from the quarterly public PECOS enrolment file published on data.cms.gov.