John M. Tomkowiak, MD
Psychiatry Physician · North Chicago, IL
John M. Tomkowiak, MD is a psychiatry physician with a practice address in North Chicago, Illinois, and NPI 1649553751, issued on Sep 25, 2011. Check the license (Illinois 036.091148, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John M. Tomkowiak
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036.091148 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3333 Green Bay RD, North Chicago, IL 60064
- Phone
- (847) 578-8381
- Enumerated
- Sep 25, 2011
- Record last updated
- Oct 15, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (847) 578-8319
- Medicare enrollment
- Enrolled (PECOS I20231219001664); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 3333 Green Bay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ehab Abdelhamid, MDStudent in an Organized Health Care Education/Training Program1235086547
- Senah Abu-SamraCritical Care Medicine Registered Nurse1225914039
- Faustina AdamsStudent in an Organized Health Care Education/Training Program1093418246
- Adeola Adegbemle, MDInternal Medicine Physician1669725651
- Abiola Adojutelegan, PA STUDENTPhysician Assistant1255134813
- Shubham AgarwalInternal Medicine Physician1326690181
Verify John M. Tomkowiak 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 036.091148Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average psychiatry physician in 2024
50 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Clomipramine Hcl11 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
- Department OF Social Dept OF Shs Div OF InstnsMedical Lake, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John M. Tomkowiak among 2,147 psychiatry physician records in Illinois
John M. Tomkowiak, MD is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 60% of them.
- NPI issued2011 · 60% of these records are older, 38% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated1992 · median 2004 among the 877 with a school on file
- Record last updated2011 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 psychiatry physician records list a practice address in North Chicago
They are 59 of the 1,069 NPPES records with a practice address in North Chicago, and 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in North Chicago → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Dinuk Abeysekera, M.D.North Chicago, IL 600641366616534
- Nutan Atre-Vaidya, M.D.North Chicago, IL 600641326092842
- Corinne Belsky, MDNorth Chicago, IL 600641902824113
- Jenifer Gunther, MDNorth Chicago, IL 600641598738445
- Tariq Hassan, M.DNorth Chicago, IL 600641871504696
- Anjum Khatoon, D.O.North Chicago, IL 600641174784961
- Jadwiga Kuszynska, M.D.North Chicago, IL 600641619085297
- Lynn MalanfantNorth Chicago, IL 600641053334425
Common questions
What is John M. Tomkowiak, MD's NPI number?
John M. Tomkowiak, MD's National Provider Identifier (NPI) is 1649553751, issued on Sep 25, 2011. An NPI identifies a provider in billing; it is not a license.
Where is John M. Tomkowiak, MD located?
The NPPES record lists a practice address at 3333 Green Bay RD, North Chicago, IL, 60064. Phone: (847) 578-8381. Providers update this record themselves, so call before visiting.
How can I verify John M. Tomkowiak, MD's license?
NPPES lists Illinois license number 036.091148, 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 John M. Tomkowiak, MD prescribe under Medicare Part D?
In 2024, John M. Tomkowiak, MD had 50 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.