Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brent H. Greenwald, M.D.

Neurological Surgery Physician in Idaho Falls, ID · enumerated 2006.

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

National Provider Identifier

1134155666

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Registry record

Entity type Individual (Type 1)

Name Dr. Brent H. Greenwald

Credential M.D.

Sex Male

Practice address 3155 Channing Way, Suite B, Idaho Falls, ID, 83404

Phone (208) 535-4800

Fax (208) 535-4807

Enumeration date Jun 25, 2006

Last updated in NPPES Jul 13, 2009

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License M-6947 (ID) 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
000010001551	Other	ID	BLUE SHIELD
002786100	Medicaid	ID	-
82-0529781	Other	ID	TAX ID NO
76836	Other	ID	BLUE CROSS
8M987	Other	ID	BLUE CROSS PRACTICE

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 Brent Greenwald?

The National Provider Identifier (NPI) for Brent Greenwald is 1134155666, a Type 1 (individual) record in the CMS NPPES registry.

Where does Brent Greenwald practice?

The practice location on file with NPPES is in Idaho Falls, ID. 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 2009-07-13.