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

Guillermo Acero, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1629144373

Guillermo Acero, MD is an Anatomic Pathology & Clinical Pathology Physician in Ojai, California. Licensed in California. Registered with an NPI since 2006.

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

See every abbreviation used in this directory →

Practice location Address checks out

1306 Maricopa Highway Ojai Valley Community Hospital
Ojai, CA 93023
Phone: (805) 646-1401
Fax: (805) 646-0431
Show map & directions

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

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence A26498 (CA)

Record details

NPI number1629144373
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 27, 2006
Last updated in NPPESMarch 7, 2023
Mailing addressPo Box 25420, Ventura, CA 93002-2277