NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Bruce William Irwin, M.D.

Pain Medicine (Anesthesiology) Physician in Libertyville, IL · enumerated 2006.

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

National Provider Identifier

1891757720

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Registry record

Entity type Individual (Type 1)
Name Bruce William Irwin
Credential M.D.
Sex Male
Practice address Libertyville, IL, 60048
Phone (847) 549-1609
Fax (847) 549-1646
Enumeration date Apr 5, 2006
Last updated in NPPES Jan 5, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 036086240 (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
0360862401 Medicaid IL -
04920125 Other IL BC/BS OF 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

What is the NPI number for Bruce Irwin?
The National Provider Identifier (NPI) for Bruce Irwin is 1891757720, a Type 1 (individual) record in the CMS NPPES registry.
Where does Bruce Irwin practice?
The practice location on file with NPPES is in Libertyville, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-05.