Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Sergio O Neira, MD

Individual provider Internal Medicine Physician · NPI 1043373194

Sergio O Neira, MD is an Internal Medicine in Oxnard, California. Qualified in 1973, 53 years ago. Practices with Primary Medical Group of Ventura County Inc, a 42-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
53
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1901 Outlet Center Dr Ste 200
Oxnard, CA 93036-0666
Phone: (805) 981-8300
Fax: (805) 981-8302
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A38228 (CA)

Record details

NPI number1043373194
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 19, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1901 Outlet Center Dr Ste 200, Oxnard, CA 93036-0666

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1973 (53 years in practice)
Group practice Primary Medical Group Of Ventura County Inc — 42 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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