DIANE L OZOG, MDSC
NPI 1245374875
Allergy & Immunology in Naperville, IL

Q: What is Diane L Ozog, Mdsc's NPI number?

The NPI number for Diane L Ozog, Mdsc is 1245374875. It was assigned to this organization in the NPPES registry on February 16, 2007.

Q: What is Diane L Ozog, Mdsc's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Active since February 16, 2007

1331 W 75TH ST STE 303, NAPERVILLE, IL 60540(630) 652-0606(630) 652-9900 Get Directions Write a Review

NPPES record last updated: October 30, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 30, 2018, Oct 3, 2018, Mar 17, 2018 and 1 more (4 updates tracked since 2017).

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About Diane L Ozog, Mdsc NPPES

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

DIANE L OZOG, MDSC (NPI 1245374875) is a healthcare organization registered as an allergy & immunology in Naperville, Illinois and active in the NPI registry since February 2007. The organization maintains a secondary practice location in Naperville and lists Diane L Ozog, President, as its authorized official.

NPPES Registry Identity

NPI1245374875

Entity TypeOrganization

Primary Taxonomy207K00000X

Legal Business NameDIANE L OZOG, MDSC

Location Address1331 W 75TH ST STE 303Naperville, IL 60540-9311

Mailing Address1331 W 75th St Ste 303Naperville, IL 60540-9311 · (630) 652-0606 · Fax (630) 652-9900

Phone(630) 652-0606

Fax(630) 652-9900

Organization SubpartNo

Authorized OfficialDiane L OzogPresident · (630) 652-0606

Enumeration DateFebruary 16, 2007

Last NPPES UpdateOctober 30, 20184 updates tracked since enumeration

✔ NPI 1245374875 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in IL · 042006736

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

1331 W 75TH ST STE 303, Naperville, IL 60540

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Secondary Practice Location 1

Location 11331 W 75th St Ste 303Naperville, IL 60540-9311 · Phone (630) 652-0606 · Fax (630) 652-9900

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diane L Ozog, Mdsc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 3 clinicians reassign Medicare billing to Diane L Ozog, Mdsc, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (3)

Diane Ozog, MD

Allergy/Immunology

NPI 1972647154

1331 W 75TH ST STE 303
Naperville, IL 60540

(630) 652-0606

✔ PECOS✔ Accepts MedicareSame address

Alena Leonova, APN. NP-C

Nurse Practitioner

NPI 1730632316

1331 W 75TH ST SUITE 303
Naperville, IL 60540

(630) 652-0606

✔ PECOS✔ Accepts MedicareSame address

Pooja Patel, M.D.

Allergy/Immunology

NPI 1841585692

9012 CONNECTICUT ST
Merrillville, IN 46410

(219) 769-6177

✔ PECOS✔ Accepts Medicare48 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Diane L Ozog, Mdsc's NPI number?

The NPI number for Diane L Ozog, Mdsc is 1245374875. It was assigned to this organization in the NPPES registry on February 16, 2007.

Where is Diane L Ozog, Mdsc located?

Diane L Ozog, Mdsc is located at 1331 W 75th St Ste 303, Naperville, IL 60540. The listed phone number is (630) 652-0606.

What is Diane L Ozog, Mdsc's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Diane L Ozog, Mdsc enrolled in Medicare?

Yes. Diane L Ozog, Mdsc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Diane L Ozog, Mdsc?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Diane L Ozog, Mdsc, in Allergy/Immunology and Nurse Practitioner. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Diane L Ozog, Mdsc was last updated on October 30, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.