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

Peter W Castellanos, MD

Neurology with Special Qualifications in Child Neurology Physician in Idaho Falls, ID · enumerated 2005.

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

National Provider Identifier

1811991474

Verified

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Registry record

Entity type Individual (Type 1)

Name Peter W Castellanos

Credential MD

Sex Male

Practice address Idaho Falls, ID, 83404

Phone (208) 529-4300

Fax (208) 881-5121

Enumeration date Jun 10, 2005

Last updated in NPPES Jul 29, 2021

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

Taxonomy & licenses

2084N0402X Neurology with Special Qualifications in Child Neurology Physician Allopathic & Osteopathic Physicians · License 01048179 (IN) Secondary

2084N0402X Neurology with Special Qualifications in Child Neurology Physician Allopathic & Osteopathic Physicians · License M10191 (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
200173520	Medicaid	IN	-
000000089466	Other	IN	ANTHEM BXBS

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 Peter Castellanos?

The National Provider Identifier (NPI) for Peter Castellanos is 1811991474, a Type 1 (individual) record in the CMS NPPES registry.

Where does Peter Castellanos 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

Browse all →

Mountain States Cardiovascular and Specialist · Idaho Falls, ID NPI 1306862503 Grand Teton Child Neurology Neurology with Special Qualifications in Child Neurology Physician · Idaho Falls, ID NPI 1639322258

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-29.