Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Guy M Dugan, MD

Critical Care Medicine (Internal Medicine) Physician in Elk Grove Village, IL · enumerated 2006.

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

National Provider Identifier

1821041559

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Registry record

Entity type Individual (Type 1)

Name Dr. Guy M Dugan

Credential MD

Sex Male

Practice address 800 Biesterfield Rd, Icu Dept, Elk Grove Village, IL, 60007

Phone (847) 437-5500

Enumeration date May 17, 2006

Last updated in NPPES Mar 5, 2025

Taxonomy & licenses

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036086010 (IL) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 036086010 (IL) Secondary

207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036086010 (IL) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036086010 (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
1617373	Other	IL	BCBS OF IL
036086010	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1821041559 active?

Yes, as of the latest NPPES snapshot, NPI 1821041559 is active (record last updated 2025-03-05).

How do I verify Guy Dugan's NPI record?

Cross-check NPI 1821041559 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 2025-03-05.