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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregorio Ruelas, M.D.

Family Medicine Physician in Oxnard, CA · enumerated 2007.

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

National Provider Identifier

1447441092

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregorio Ruelas
Credential M.D.
Sex Male
Practice address 1751 Lombard St, Oxnard, CA, 93030
Phone (805) 981-9111
Fax (833) 916-2152
Enumeration date Aug 8, 2007
Last updated in NPPES Mar 3, 2021

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A95991 (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
A95991 Other CA LICENSE NUMBER

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 specialty is Gregorio Ruelas?
Gregorio Ruelas is registered in NPPES with the primary taxonomy of Family Medicine 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 2021-03-03.