NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Saul Castro, M.D.

General Practice Physician in El Reno, OK · enumerated 2006 · practices at El Reno Indian Health Center.

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

National Provider Identifier

1407919269

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Registry record

Entity type Individual (Type 1)
Name Robert Saul Castro
Credential M.D.
Sex Female
Practice address 1631 A East Hwy 66, El Reno, OK, 73036
Phone (405) 262-7631
Fax (405) 262-8099
Enumeration date Dec 19, 2006
Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 4301065570 (MI) 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
9107004 Medicaid OK —

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

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.
What specialty is Robert Castro?
Robert Castro is registered in NPPES with the primary taxonomy of General Practice Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.