WILLIAM E MCCORMICK, MD, PC
NPI 1053468405
Neurological Surgery in West Islip, NY

Active since January 05, 2007
380 MONTAUK HWY, WEST ISLIP, NY 11795(631) 422-5371 Get Directions Write a Review

NPPES record last updated: January 20, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William E Mccormick, Md, Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM E MCCORMICK, MD, PC (NPI 1053468405) is a healthcare organization registered as a neurological surgery in West Islip, New York and active in the NPI registry since January 2007. The organization lists William E Mccormick, President, as its authorized official.

NPPES Registry Identity

NPI1053468405
Entity TypeOrganization
Primary Taxonomy207T00000X
Legal Business NameWILLIAM E MCCORMICK, MD, PC
Location Address380 MONTAUK HWYWest Islip, NY 11795-4403
Mailing Address380 Montauk HwyWest Islip, NY 11795-4403 · (631) 422-5371
Organization SubpartNo
Authorized OfficialWilliam E MccormickPresident · (631) 422-5371
Enumeration DateJanuary 5, 2007
Last NPPES UpdateJanuary 20, 2022
NPPES CertifiedJanuary 20, 2022
✔ NPI 1053468405 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
380 MONTAUK HWY, West Islip, NY 11795

Other Identifiers 2

OtherWES021NY · Ptan
OtherDC9279NY · Medicare Rr

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William E Mccormick, Md, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to William E Mccormick, MD, PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Neurosurgery
NPI 1043290687
380 MONTAUK HWY
West Islip, NY 11795
(631) 422-5371
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William E Mccormick, MD, PC's NPI number?

The NPI number for William E Mccormick, MD, PC is 1053468405. It was assigned to this organization in the NPPES registry on January 5, 2007.

Where is William E Mccormick, MD, PC located?

William E Mccormick, MD, PC is located at 380 Montauk Hwy, West Islip, NY 11795. The listed phone number is (631) 422-5371.

What is William E Mccormick, MD, PC's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is William E Mccormick, MD, PC enrolled in Medicare?

Yes. William E Mccormick, MD, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through William E Mccormick, MD, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurosurgery) reassigns their Medicare billing to William E Mccormick, MD, PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for William E Mccormick, MD, PC was last updated on January 20, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.