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

Stephen Deleonardis

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1043620891

Stephen Deleonardis is an Addiction (Substance Use Disorder) Counselor in Ontario, California. Registered with an NPI since 2014.

In the registry since
2014

Practice location Address checks out

125 W F St Ste 101
Ontario, CA 91762-3201
Phone: (909) 986-4550
Show map & directions

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

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X

Record details

NPI number1043620891
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMay 2, 2014
Last updated in NPPESMay 2, 2014
Mailing address125 W F St Ste 101, Ontario, CA 91762-3201

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