Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Castillo, M.D.

Pediatrics Physician in Long Beach, CA · enumerated 2006.

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

National Provider Identifier

1063421980

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Castillo

Credential M.D.

Sex Male

Practice address 2220 Clark Ave, Long Beach, CA, 90815

Phone (562) 597-4181

Fax (562) 597-7083

Enumeration date Aug 7, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License G62694 (CA) 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
00G626940	Other	CA	BLUE SHIELD
00G626940	Medicaid	CA	—

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.

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Frequently asked questions

What specialty is Robert Castillo?

Robert Castillo is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.