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

Individual provider Peer Specialist · NPI 1508210162

Alfredo Dennis Guillen-Barrientos is a Peer Specialist in Ontario, California. Practices as a sole proprietor. Registered with an NPI since 2016.

In the registry since
2016
Specialties on file
2
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Practice location Address checks out

912 S Benson Ave
Ontario, CA 91762-4703
Phone: (323) 835-2087
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Community Health Worker (primary) Taxonomy 172V00000X
Peer Specialist Taxonomy 175T00000X

Record details

NPI number1508210162
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 20, 2016
Last updated in NPPESNovember 15, 2023
Certification dateNovember 15, 2023

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