Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Barnett, M.D.

Anesthesiology Physician in Springfield, IL · enumerated 2005.

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

National Provider Identifier

1669460846

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Barnett

Credential M.D.

Sex Male

Practice address 800 East Carpenter Street, Room 2k64, Springfield, IL, 62769

Phone (217) 525-5643

Fax (217) 544-2521

Enumeration date Oct 11, 2005

Last updated in NPPES Dec 29, 2021

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 036091297 (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
8415040	Other	IL	BLUE CROSS NUMBER
L031806	Other	IL	CHAMPUS/TRICARE
104409	Other	IL	HEALTHLINK GROUP NUMBER
085972	Other	IL	HEALTH ALLIANCE NUMBER
273639	Other	IL	HEALTHLINK UPIN NUMBER
32490	Other	IL	PERSONAL CARE

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

What is the NPI number for Gregory Barnett?

The National Provider Identifier (NPI) for Gregory Barnett is 1669460846, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Barnett practice?

The practice location on file with NPPES is in Springfield, 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 2021-12-29.