John Vasko, M.D.
Emergency Medicine Physician · Naperville, IL
John Vasko, M.D. is an emergency medicine physician with a practice address in Naperville, Illinois, and NPI 1336539022, issued on Feb 2, 2015. Check the license (Illinois 036.145653, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Vasko
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036.145653 IL
Self-reported in NPPES; status is on the state search - Practice location
- 801 S Washington St, Naperville, IL 60540
- Phone
- (630) 527-3000
- Enumerated
- Feb 2, 2015
- Record last updated
- Dec 3, 2025
- Medicare enrollment
- Enrolled (PECOS I20180822002461); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2015
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 801 S Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Saroosh Ahmed, MDEmergency Medicine Physician1639335078
- Faisal Akbari, M.DHospitalist Physician1740598705
- Catherine AlerNurse Practitioner1134584964
- Irfan Ali, DOHospitalist Physician1306427760
- Sivani Aluru, MDObstetrics & Gynecology Physician1275156325
Verify John Vasko 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 036.145653Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average emergency medicine physician in 2024
169 Medicare Part D claims for 128 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 24 claims were for opioids.
Most prescribed
- Cephalexin25 claims
- Hydrocodone-Acetaminophen18 claims
- Prednisone12 claims
- Ondansetron Odt11 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: $19.76
1 payment: food and beverage; the largest payer was Paratek Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
One hospital affiliation
- Edward HospitalNaperville, IL · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John Vasko among 3,291 emergency medicine physician records in Illinois
John Vasko, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 61% of them.
- NPI issued2015 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2015 · median 2012 among the 1,867 with a school on file
- Record last updated2025 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 emergency medicine physician records list a practice address in Naperville
They are 59 of the 4,634 NPPES records with a practice address in Naperville, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Naperville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mark Batts, MDNaperville, IL 605401619921228
- Kevin Collins, M.D.Naperville, IL 605401558345934
- Rick Gimbel, M.D.Naperville, IL 605401215012380
- Bassam Kawadry, MDNaperville, IL 605401790717502
- John Lee, M.D.Naperville, IL 605401932279965
- Megan McAllister, M.D.Naperville, IL 605401437191855
- Guy Miller, D.O.Naperville, IL 605401700866167
- Linda Mueller, MDNaperville, IL 605401992775803
Common questions
What is John Vasko, M.D.'s NPI number?
John Vasko, M.D.'s National Provider Identifier (NPI) is 1336539022, issued on Feb 2, 2015. An NPI identifies a provider in billing; it is not a license.
Where is John Vasko, M.D. located?
The NPPES record lists a practice address at 801 S Washington St, Naperville, IL, 60540. Phone: (630) 527-3000. Providers update this record themselves, so call before visiting.
How can I verify John Vasko, M.D.'s license?
NPPES lists Illinois license number 036.145653, 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 Vasko, M.D. prescribe under Medicare Part D?
In 2024, John Vasko, M.D. had 169 Medicare Part D claims for 128 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.