Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ervin Denham, MD

Surgery Physician in Evanston, IL · enumerated 2006.

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

National Provider Identifier

1881658193

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Registry record

Entity type Individual (Type 1)

Name Ervin Denham

Credential MD

Sex Male

Practice address 2650 Ridge Ave, Evanston, IL, 60201

Phone (847) 570-4120

Fax (847) 570-1330

Enumeration date Apr 13, 2006

Last updated in NPPES Jan 22, 2021

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036103113 (IL) Primary

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

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

Is NPI 1881658193 active?

Yes, as of the latest NPPES snapshot, NPI 1881658193 is active (record last updated 2021-01-22).

How do I verify Ervin Denham's NPI record?

Cross-check NPI 1881658193 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-22.