DR. OSCAR LUIS ALONSO M.D.
NPI 1447285739
Specialist in Downers Grove, IL

Q: What is Oscar Alonso's NPI number?

The NPI number for Oscar Alonso is 1447285739. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Q: What is Oscar Alonso's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Oscar Alonso was last updated on April 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 12, 2006PECOS Enrolled

1121 WARREN AVE, STE 200, DOWNERS GROVE, IL 60515(630) 960-5310(630) 969-7841 Get Directions Write a Review

NPPES record last updated: April 16, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 16, 2021, Dec 22, 2020 (2 updates tracked since 2020).

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About Dr. Oscar Luis Alonso M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. OSCAR LUIS ALONSO M.D. (NPI 1447285739) is an individual specialist in Downers Grove, Illinois, licensed in Illinois (036064967) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1447285739

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. OSCAR LUIS ALONSOCredential: M.D.

Location Address1121 WARREN AVE, STE 200Downers Grove, IL 60515-3572

Mailing Address1121 Warren Ave Ste 200Downers Grove, IL 60515-3572 · (630) 960-5310

Phone(630) 960-5310

Fax(630) 969-7841

Sole ProprietorYes

Enumeration DateJuly 12, 2006

Last NPPES UpdateApril 16, 20212 updates tracked since enumeration

NPPES CertifiedApril 16, 2021

✔ NPI 1447285739 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in IL · 036064967

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

1121 WARREN AVE, Downers Grove, IL 60515

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Other Identifiers 3

Other036064967IL · Il State License Number

Other31602726IL · Blue Cross Blue Shield

Medicaid036064967IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Oscar Luis Alonso M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STEPHEN LABBIE PHD & ASSCIATES

Psychologist

1121 WARREN AVE, STE 200
DOWNERS GROVE, IL 60515

Dupage County (630) 960-2010

MS. JILLIAN RAWL GIAMMONA MA, LCPC, NCC

Counselor (Professional)

1121 WARREN AVE, SUITE 260B
DOWNERS GROVE, IL 60515

Dupage County (630) 903-0521

WEBER CHIROPRACTIC, P.C.

Chiropractor

1121 WARREN AVE, SUITE 270
DOWNERS GROVE, IL 60515

Dupage County (630) 649-1478

SECOND STORIES THERAPEUTIC INTERVENTIONS

Counselor (Professional)

1121 WARREN AVE, 260A
DOWNERS GROVE, IL 60515

Dupage County (773) 513-9414

VIRGINIA M STACK M.S.; L.C.P.C.

Counselor (Mental Health)

1121 WARREN AVE, SUITE 260
DOWNERS GROVE, IL 60515

Dupage County (630) 841-8705

DR. ROBERT CHRISTOPHER LAWLER

Obstetrics & Gynecology

1121 WARREN AVE, SUITE 200
DOWNERS GROVE, IL 60515

Dupage County (630) 968-2144

DR. BARBARA RUSANOWSKY WEBSTER DDS

Dentist (General Practice)

1121 WARREN AVE, STE 130
DOWNERS GROVE, IL 60515

Dupage County (630) 663-0554

DOWNERS GROVE OB/GYN, P.C.

Obstetrics & Gynecology

1121 WARREN AVE, SUITE 200
DOWNERS GROVE, IL 60515

Dupage County (630) 312-8008

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Oscar Alonso's NPI number?

The NPI number for Oscar Alonso is 1447285739. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is Oscar Alonso located?

Oscar Alonso practices at 1121 Warren Ave Ste 200, Downers Grove, IL 60515. The listed phone number is (630) 960-5310.

What is Oscar Alonso's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Oscar Alonso enrolled in Medicare?

Yes. Oscar Alonso is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Oscar Alonso was last updated on April 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.