Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary L Dillehay, MD

Nuclear Radiology Physician in Chicago, IL · enumerated 2005.

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

National Provider Identifier

1578540795

Verified

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Registry record

Entity type Individual (Type 1)

Name Gary L Dillehay

Credential MD

Sex Male

Practice address 251 E Huron St, Nuclear Medicine, Galter 8-110, Chicago, IL, 60611

Phone (312) 926-5119

Fax (708) 216-9033

Enumeration date Dec 29, 2005

Last updated in NPPES Apr 4, 2012

Taxonomy & licenses

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians · License 36061030 (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
36061030	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

Where does Gary Dillehay practice?

The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Gary Dillehay?

The National Provider Identifier (NPI) for Gary Dillehay is 1578540795, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-04.