Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert W Thumme, DO

Emergency Medicine Physician in Zion, IL · enumerated 2006.

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

National Provider Identifier

1275558660

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Registry record

Entity type Individual (Type 1)

Name Robert W Thumme

Credential DO

Sex Male

Practice address Cancer Treatment Centers of America, 2520 Elisha Avenue, Zion, IL, 60099

Phone (800) 322-9183

Enumeration date Jul 13, 2006

Last updated in NPPES Feb 20, 2020

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 057824 (FL) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 02721 (KY) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 46677 (WI) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 036.112912 (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
43512600	Medicaid	WI	-

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 is the NPI number for Robert Thumme?

The National Provider Identifier (NPI) for Robert Thumme is 1275558660, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Thumme practice?

The practice location on file with NPPES is in Zion, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Barbara Buttin Gynecologic Oncology Physician · Zion, IL NPI 1700876307 Sherrill Lindsey Family Medicine Physician · Zion, IL NPI 1922085372 Asim Mahmood Anesthesiology Physician · Zion, IL NPI 1144260696 Hatem Halabi Surgery Physician · Zion, IL NPI 1447283593 Brent Paxton Chiropractor · Zion, IL NPI 1609962638 Fehmida Khan Gastroenterology Physician · Zion, IL NPI 1487730792 Ryan Engel Medical Oncology Physician · Zion, IL NPI 1740336718 Amy Rizman Physician Assistant · Zion, IL NPI 1508061409

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-20.