David Ulaszek, M.D.
Internal Medicine Physician · Chicago, IL
David Ulaszek, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1215912316, issued on Dec 12, 2005. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- David Ulaszek
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 5525 S Pulaski RD, Chicago, IL 60629
- Phone
- (773) 585-1955
- Enumerated
- Dec 12, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (773) 284-5268
- Medicaid ID
- 036082090 / 01 IL
- Medicare enrollment
- Enrolled (PECOS I20110104000645); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 5525 S Pulaski RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ann Garcelon, M.D.Internal Medicine Physician1750364212
Verify David Ulaszek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average internal medicine physician in 2024
3,877 Medicare Part D claims for 294 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 142 claims were for opioids.
Most prescribed
- Atorvastatin Calcium279 claims
- Amlodipine Besylate205 claims
- Metoprolol Succinate155 claims
- Lisinopril137 claims
- Metformin Hcl132 claims
- Levothyroxine Sodium120 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.
Bills Medicare through one group practice
- Osf Multi-Specialty GroupPeoria, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Ulaszek among 7,238 internal medicine physician records in Illinois
David Ulaszek, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1991 · median 2003 among the 3,580 with a school on file
- Record last updated2026 · 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).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Ann Garcelon, M.D.Chicago, IL 606291750364212
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- Michael McDonnell, M.D.Chicago, IL 606291467436972
Common questions
What is David Ulaszek, M.D.'s NPI number?
David Ulaszek, M.D.'s National Provider Identifier (NPI) is 1215912316, issued on Dec 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David Ulaszek, M.D. located?
The NPPES record lists a practice address at 5525 S Pulaski RD, Chicago, IL, 60629. Phone: (773) 585-1955. Providers update this record themselves, so call before visiting.
How can I verify David Ulaszek, M.D.'s license?
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 David Ulaszek, M.D. prescribe under Medicare Part D?
In 2024, David Ulaszek, M.D. had 3,877 Medicare Part D claims for 294 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.