What is Michael Iwanicki's NPI number?

Michael Iwanicki's National Provider Identifier (NPI) is 1003845561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Michael Iwanicki's specialty?

Michael Iwanicki is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).

Where is Michael Iwanicki located?

Michael Iwanicki's practice location on file with NPPES is 3815 Highland Ave, Downers Grove, IL 60515-1500.

What is Michael Iwanicki's phone number?

The practice phone number listed in the NPPES registry for Michael Iwanicki is (630) 275-7800.

Does Michael Iwanicki accept Medicare?

Michael Iwanicki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Michael Iwanicki's NPI active?

Yes — Michael Iwanicki's NPI (1003845561) is active in the NPPES registry as of the last update on 2025-03-25.

IndividualActiveAccepts Medicare

Michael Iwanicki, D.O.

NPI 1003845561 · Surgery Physician · Downers Grove, IL

Michael Iwanicki, D.O. is a Surgery Physician provider in Downers Grove, IL (NPI 1003845561).

Provider details

NPI number: 1003845561
Entity type: Individual
Primary specialty: Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: D.O.
Sex: Male
Sole proprietor: No
License: 036-105399 (IL)

Practice location

3815 Highland Ave

Tower 2, Suite 107

Downers Grove, IL 60515-1500

Phone: (630) 275-7800

Fax: (630) 810-9240

Street-level locationGet directions

More IL providers

Mailing address

29373 Network Pl

Chicago, IL 60673-1293

Specialties & taxonomies

Surgery PhysicianPrimary208600000XLicense 036-105399 (IL)
Allopathic & Osteopathic Physicians
Trauma Surgery Physician2086S0127XLicense 036-105399 (IL)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(87/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
20 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
456 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	188	$120
Critical Care, First 30-74 Minutes99291	169	$212
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	31	$127
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	25	$133
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	21	$171
Repair of Groin Hernia Using an Endoscope

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.

Drug	Part D claims (2024)	Beneficiaries
Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen	31	31

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$40,693 across 51 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2006-06-30
Last updated: 2025-03-25
Certified: 2025-03-25

Frequently asked questions

What is Michael Iwanicki's NPI number?: Michael Iwanicki's National Provider Identifier (NPI) is 1003845561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Michael Iwanicki's specialty?: Michael Iwanicki is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
Where is Michael Iwanicki located?: Michael Iwanicki's practice location on file with NPPES is 3815 Highland Ave, Downers Grove, IL 60515-1500.
What is Michael Iwanicki's phone number?: The practice phone number listed in the NPPES registry for Michael Iwanicki is (630) 275-7800.
Does Michael Iwanicki accept Medicare?: Michael Iwanicki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Michael Iwanicki's NPI active?: Yes — Michael Iwanicki's NPI (1003845561) is active in the NPPES registry as of the last update on 2025-03-25.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	188	$120
Critical Care, First 30-74 Minutes99291	169	$212
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	31	$127
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	25	$133
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	21	$171
Repair of Groin Hernia Using an Endoscope

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.

Drug	Part D claims (2024)	Beneficiaries
Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen	31	31

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$40,693 across 51 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments