Stephen Herbert Kozlowski, M.D.
Rheumatology Physician · Crystal Lake, IL
Stephen Herbert Kozlowski, M.D. is a rheumatology physician with a practice address in Crystal Lake, Illinois, and NPI 1285749390, issued on Aug 20, 2006. Check the license (Illinois 036-053309, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Stephen Herbert Kozlowski
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036-053309 IL
Self-reported in NPPES; status is on the state search - Practice location
- 360 Station Dr, Crystal Lake, IL 60014
- Phone
- (815) 338-6600
- Enumerated
- Aug 20, 2006
- Record last updated
- Jul 21, 2022
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 360 Station Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jennifer Garrels, FNP-BC,RN,RDFamily Nurse Practitioner1801351648
Verify Stephen Herbert Kozlowski 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 036-053309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average rheumatology physician in 2024
25 Medicare Part D claims, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Tramadol Hcl17 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.
Stephen Herbert Kozlowski among 340 rheumatology physician records in Illinois
Stephen Herbert Kozlowski, M.D. is one of 340 rheumatology physician records with a practice address in Illinois. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
All 340 in Illinois → Every provider in Crystal Lake → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Andrew Benck, M.D.Bannockburn, IL 600151326574971
- Lori Siegel, MDBannockburn, IL 600151730144882
- Kenneth Crane, M.D.Des Plaines, IL 600161487760286
- Sergey Furmanov, MDDes Plaines, IL 600161669586079
- Nisarg Gandhi, M.D.Des Plaines, IL 600161982982039
- Olga Goodman, M.D.Des Plaines, IL 600161407081698
- Benjamin Frank, MDBarrington, IL 600101871554097
- Jadwiga Czajkowska, D.O.Elk Grove Village, IL 600071629242094
Common questions
What is Stephen Herbert Kozlowski, M.D.'s NPI number?
Stephen Herbert Kozlowski, M.D.'s National Provider Identifier (NPI) is 1285749390, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Herbert Kozlowski, M.D. located?
The NPPES record lists a practice address at 360 Station Dr, Crystal Lake, IL, 60014. Phone: (815) 338-6600. Providers update this record themselves, so call before visiting.
How can I verify Stephen Herbert Kozlowski, M.D.'s license?
NPPES lists Illinois license number 036-053309, 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 Stephen Herbert Kozlowski, M.D. prescribe under Medicare Part D?
In 2024, Stephen Herbert Kozlowski, M.D. had 25 Medicare Part D claims; the average among rheumatology physician prescribers was 1,978. 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.