Piotr Michaliszyn, MD
Internal Medicine Physician · Elgin, IL
Piotr Michaliszyn, MD is an internal medicine physician with a practice address in Elgin, Illinois, and NPI 1093177024, issued on Mar 29, 2016. Check the license (Illinois 036-148777, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Piotr Michaliszyn
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-148777 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1425 N Randall RD # 2-1200, Elgin, IL 60123
- Phone
- (224) 783-2525
- Enumerated
- Mar 29, 2016
- Record last updated
- Dec 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (224) 783-2527
- Medicare enrollment
- Enrolled (PECOS I20190725000445); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1425 N Randall RD # 2-1200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Piotr Michaliszyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-148777Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
186 Medicare Part D claims for 102 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 19 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass17 claims
- Hydrocodone-Acetaminophen16 claims
- Pantoprazole Sodium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $406.93
5 payments; by number, the most common kind was food and beverage; the largest payer was Esperion Therapeutics, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Advocate Health And Hospitals CorporationElgin, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Piotr Michaliszyn among 7,238 internal medicine physician records in Illinois
Piotr Michaliszyn, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 63% of them.
- NPI issued2016 · 63% of these records are older, 36% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2016 · median 2003 among the 3,580 with a school on file
- Record last updated2021 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
62 internal medicine physician records list a practice address in Elgin
They are 62 of the 2,268 NPPES records with a practice address in Elgin, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Elgin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Richard Baley, M.D.Elgin, IL 601231184693327
- Jawed Ehsan, MDElgin, IL 601231114901501
- John Fiedler, M.D.Elgin, IL 601231487623716
- Dennis Flynn, M.D.Elgin, IL 601231295704435
- Jeffrey Garb, M.D.Elgin, IL 601231023063237
- Anandita Gephart, M.D.Elgin, IL 601231790709343
- Michael Hernandez, M.D.Elgin, IL 601231972501096
- Ronald Hirsch, M.D.Elgin, IL 601231467450585
Common questions
What is Piotr Michaliszyn, MD's NPI number?
Piotr Michaliszyn, MD's National Provider Identifier (NPI) is 1093177024, issued on Mar 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Piotr Michaliszyn, MD located?
The NPPES record lists a practice address at 1425 N Randall RD # 2-1200, Elgin, IL, 60123. Phone: (224) 783-2525. Providers update this record themselves, so call before visiting.
How can I verify Piotr Michaliszyn, MD's license?
NPPES lists Illinois license number 036-148777, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Piotr Michaliszyn, MD prescribe under Medicare Part D?
In 2024, Piotr Michaliszyn, MD had 186 Medicare Part D claims for 102 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.