Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Evan David Allen, M.D.

Neurology Physician in Lake Forest, IL · enumerated 2006.

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

National Provider Identifier

1821101742

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Registry record

Entity type Individual (Type 1)

Name Dr. Evan David Allen

Credential M.D.

Sex Male

Practice address 1000 N Westmoreland Rd # Level3, Lake Forest, IL, 60045

Phone (847) 535-8500

Fax (847) 535-8499

Enumeration date Aug 16, 2006

Last updated in NPPES Sep 6, 2024

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 46414 (KY) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 01072076A (IN) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License G88720 (CA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License ME82452 (FL) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 4301504704 (MI) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License MD440251 (PA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License MD61068190 (WA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 036108165 (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
7100756660	Medicaid	KY	-
201374230	Medicaid	IN	-

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 Evan Allen's NPI record?

Cross-check NPI 1821101742 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821101742 active?

Yes, as of the latest NPPES snapshot, NPI 1821101742 is active (record last updated 2024-09-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-06.