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

Mark C. O'Brien, DO, Inc

Organization Internal Medicine Physician · NPI 1346060860

Mark C. O'Brien, DO, Inc is an Internal Medicine Physician in Vista, California. Registered with an NPI since 2024.

In the registry since
2024
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

161 Thunder Dr Ste 210
Vista, CA 92083-6052
Phone: (760) 889-1763
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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

Record details

NPI number1346060860
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark O'Brien — President · (760) 889-1763
NPI enumeratedOctober 10, 2024
Last updated in NPPESOctober 10, 2024
Certification dateOctober 10, 2024
Mailing address6786 Vermarine Ct, Carlsbad, CA 92009-1705

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