Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Willowbrook Medical Center Ltd.

Family Medicine Physician in Willowbrook, IL · enumerated 2007 · authorized official Anthony Bilotta, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023231289

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Registry record

Entity type Organization (Type 2)

Legal business name Willowbrook Medical Center Ltd.

Practice address 535 Plainfield Road, Suite C, Willowbrook, IL, 60527

Phone (630) 986-7501

Fax (630) 986-7505

Enumeration date Apr 10, 2007

Last updated in NPPES Apr 20, 2015

Taxonomy & classification

173000000X Legal Medicine Other Service Providers · License 036078620 (IL) Secondary

202C00000X Independent Medical Examiner Physician Allopathic & Osteopathic Physicians · License 036078620 (IL) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036078620 (IL) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036073808 (IL) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036078620 (IL) Secondary

2083P0901X Public Health & General Preventive Medicine Physician Allopathic & Osteopathic Physicians · License 036078620 (IL) Secondary

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians · License 036078620 (IL) Secondary

261QP2000X Physical Therapy Clinic/Center Ambulatory Health Care Facilities · License 036078620 (IL) Secondary

261QU0200X Urgent Care Clinic/Center Ambulatory Health Care Facilities · License 036078620 (IL) Secondary

Authorized official

Name Anthony Bilotta

Title President

Phone (630) 986-7501

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Willowbrook Medical Center Ltd.?

Willowbrook Medical Center Ltd. is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-20.