Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas D Weyburn Jr., D.O.

Medical Oncology Physician in Crystal Lake, IL · enumerated 2005.

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

National Provider Identifier

1487636478

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas D Weyburn Jr.

Credential D.O.

Sex Male

Practice address 525 E Congress Pkwy Ste 300, Crystal Lake, IL, 60014

Phone (815) 759-9260

Fax (815) 459-7840

Enumeration date Nov 16, 2005

Last updated in NPPES Aug 2, 2023

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 036098952 (IL) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
0360989521	Medicaid	IL	-

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.

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Frequently asked questions

How do I verify Thomas Weyburn's NPI record?

Cross-check NPI 1487636478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1487636478 active?

Yes, as of the latest NPPES snapshot, NPI 1487636478 is active (record last updated 2023-08-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-02.