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

Mark Allen O'Brien, DC

Individual provider Independent Medical Examiner Chiropractor · NPI 1770180895

Mark Allen O'Brien, DC is an Independent Medical Examiner Chiropractor in El Dorado Hills, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2020
Specialties on file
3
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

350 Green Valley Rd
El Dorado Hills, CA 95762-3927
Phone: (570) 690-5629
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 34782 (CA)
Independent Medical Examiner Chiropractor Taxonomy 111NI0013X · Licence 35782 (CA)
Occupational Health Chiropractor Taxonomy 111NX0100X · Licence 34782 (CA)

Record details

NPI number1770180895
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedOctober 1, 2020
Last updated in NPPESOctober 1, 2020
Certification dateOctober 1, 2020

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