Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MICHAEL LEONARD SIWEK D.D.S
NPI 1073557732
Dentist in River Grove, IL

Q: What is Michael Siwek's NPI number?

The NPI number for Michael Siwek is 1073557732. It was assigned to this individual provider in the NPPES registry on June 15, 2006.

Q: What is Michael Siwek's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Q: When was this NPI record last updated?

The NPPES record for Michael Siwek was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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 June 15, 2006PECOS Enrolled

8368 GRAND AVE, RIVER GROVE, IL 60171(708) 453-0500(708) 453-0580 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Michael Leonard Siwek D.d.s NPPES

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

DR. MICHAEL LEONARD SIWEK D.D.S (NPI 1073557732) is an individual dentist in River Grove, Illinois and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1073557732

Entity TypeIndividualMale

Primary Taxonomy122300000X

Provider Legal NameDR. MICHAEL LEONARD SIWEKCredential: D.D.S

Location Address8368 GRAND AVERiver Grove, IL 60171-1435

Mailing Address8 S 153 Madison St.Burr Ridge, IL 60527-5553 · (630) 321-1055 · Fax (708) 453-0580

Phone(708) 453-0500

Fax(708) 453-0580

Sole ProprietorNo

Enumeration DateJune 15, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1073557732 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers

Taxonomy Code122300000X

Definition

A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

8368 GRAND AVE, River Grove, IL 60171

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Alabama, Blue Cross and Blue Shield of Montana and more.Insurance ›

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. Michael Leonard Siwek D.d.s 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60171 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$94.06 typical visit price

range $60.08 – $183.39

Typical copayment $23.51 (range $15.02 – $45.84)

Most-billed visit code 99203

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Michael Siwek's NPI number?

The NPI number for Michael Siwek is 1073557732. It was assigned to this individual provider in the NPPES registry on June 15, 2006.

Where is Michael Siwek located?

Michael Siwek practices at 8368 Grand Ave, River Grove, IL 60171. The listed phone number is (708) 453-0500.

What is Michael Siwek's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Michael Siwek enrolled in Medicare?

Yes. Michael Siwek is registered in the Medicare PECOS enrollment system.

What insurance does Michael Siwek accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Alabama, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Michael Siwek as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Michael Siwek was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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.