Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J Castillo, M.D.

Pediatric Cardiology Physician in Las Vegas, NV · enumerated 2006.

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

National Provider Identifier

1093895286

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. William J Castillo

Credential M.D.

Sex Male

Practice address 3131 La Canada St Ste 230, Las Vegas, NV, 89169

Phone (702) 732-1290

Fax (702) 732-1385

Enumeration date Oct 16, 2006

Last updated in NPPES Mar 8, 2022

Taxonomy & licenses

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians · License 20947 (WV) Secondary

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians · License 12420 (NV) 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
NV8114	Other	-	BLUE CROSS BLUE SHIELD
1093895286	Medicaid	NV	-
2003496000	Medicaid	WV	-
VWCLCQ	Other	NV	MEDICARE GROUP

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

How do I verify William Castillo's NPI record?

Cross-check NPI 1093895286 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1093895286 active?

Yes, as of the latest NPPES snapshot, NPI 1093895286 is active (record last updated 2022-03-08).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-08.