Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick Callahan, M.D

Anesthesiology Physician in Hoffman Estates, IL · enumerated 2006.

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

National Provider Identifier

1972569481

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Registry record

Entity type Individual (Type 1)

Name Patrick Callahan

Credential M.D

Sex Male

Practice address 1555 Barrington Rd, Hoffman Estates, IL, 60169

Phone (847) 490-2923

Enumeration date Apr 24, 2006

Last updated in NPPES Jun 11, 2008

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 036075060 (IL) Primary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License 036075060 (IL) Secondary

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
036075060	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 1972569481 active?

Yes, as of the latest NPPES snapshot, NPI 1972569481 is active (record last updated 2008-06-11).

How do I verify Patrick Callahan's NPI record?

Cross-check NPI 1972569481 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 2008-06-11.