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

Dr. Oscar Luis Alonso, MD

Individual provider Specialist · NPI 1447285739

Dr. Oscar Luis Alonso, MD is a Specialist in Downers Grove, Illinois. Practices as a sole proprietor. Licensed in Illinois.

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

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Practice location Address checks out

1121 Warren Ave Ste 200
Downers Grove, IL 60515-3572
Phone: (630) 960-5310
Fax: (630) 969-7841
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 036064967 (IL)

Record details

NPI number1447285739
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 12, 2006
Last updated in NPPESApril 16, 2021
Certification dateApril 16, 2021

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