Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Lagrange Oncology Associates

Hematology & Oncology Physician in Geneva, IL · enumerated 2006 · authorized official Cheryl Wesolowski, Practice Administrator.

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

National Provider Identifier

1295814788

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Registry record

Entity type Organization (Type 2)

Legal business name Lagrange Oncology Associates

Practice address 302 Randall Rd Ste 20, Geneva, IL, 60134

Phone (630) 232-0610

Fax (630) 232-0675

Enumeration date Nov 3, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Cheryl Wesolowski

Title Practice Administrator

Phone (708) 579-3418

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

Where is Lagrange Oncology Associates located?

The practice location on file with NPPES is in Geneva, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.