FindMyNPI
Medicare enrollment lookup

One provider matched this enrollment ID.

Enrollment ID I20100202000453 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.
MD
NPI · 1538155122 · Active
Mark Duncan DO
Neurological Surgery Physician · Lawton, Oklahoma
Active
NPI
1538155122
Enrollment ID
I20100202000453
Taxonomy
207T00000X
Type
Practitioner - Neurosurgery

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.

Medicaid

Other

  • 140007550· Issued by RAILROAD MEDICARE
  • 7358213OK· Issued by AETNA
  • 175194701OK· Issued by DOL

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.