Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas E Neff, MD

Anesthesiology Physician in Berwyn, IL · enumerated 2006.

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

National Provider Identifier

1679504898

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Registry record

Entity type Individual (Type 1)

Name Thomas E Neff

Credential MD

Sex Male

Practice address 3249 Oak Park Ave, Anesthesia Department, Berwyn, IL, 60402

Phone (708) 783-3667

Enumeration date Jul 5, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 036-109070 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
036109070	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 Neff's NPI record?

Cross-check NPI 1679504898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1679504898 active?

Yes, as of the latest NPPES snapshot, NPI 1679504898 is active (record last updated 2007-07-08).

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Mark Choi Diagnostic Radiology Physician · Berwyn, IL NPI 1982690830 Haris Aleem Hospitalist Physician · Berwyn, IL NPI 1063409795 Gottlieb Community Health Services Corporation General Acute Care Hospital · Berwyn, IL NPI 1043292428 Gholamali Afshang Diagnostic Radiology Physician · Berwyn, IL NPI 1316925522 Syed Khan Psychiatry Physician · Berwyn, IL NPI 1407807746 Patricia Gavin Diagnostic Radiology Physician · Berwyn, IL NPI 1659327195 Carlos Castaneda Emergency Medicine Physician · Berwyn, IL NPI 1053368878 Udochukwu Asonye Pediatrics Physician · Berwyn, IL NPI 1114964673

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.