Jules A. Marks, D.O.
Internal Medicine Physician · Buffalo Grove, IL
Jules A. Marks, D.O. is an internal medicine physician with a practice address in Buffalo Grove, Illinois, and NPI 1346228814, issued on Jan 5, 2006. Check the license (Illinois 03684408, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Jules A. Marks
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 03684408 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Busch Parkway, Buffalo Grove, IL 60089
- Phone
- (847) 537-7744
- Enumerated
- Jan 5, 2006
- Record last updated
- Feb 28, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (847) 537-9719
- Medicaid ID
- 36084408 IL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1450 Busch Parkway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jules A. Marks 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 03684408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Jules A. Marks among 7,238 internal medicine physician records in Illinois
Jules A. Marks, D.O. 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 not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2012 · 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).
24 internal medicine physician records list a practice address in Buffalo Grove
They are 24 of the 868 NPPES records with a practice address in Buffalo Grove, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,238 in Illinois → Every provider in Buffalo Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Charman, M.D.Buffalo Grove, IL 600891346228954
- Mark Charman, M.D.Buffalo Grove, IL 600891033197637
- Stuart Ferber, M.D.Buffalo Grove, IL 600891952389413
- Irina Goldvekht, D.O.Buffalo Grove, IL 600891154309755
- Thomas Heggen, MDBuffalo Grove, IL 600891710974860
- Gabriel Kibrit, MDBuffalo Grove, IL 600891477531937
- Carl Lang, M.D.Buffalo Grove, IL 600891730167339
- Wendi Marcus, M.D.Buffalo Grove, IL 600891548249113
Common questions
What is Jules A. Marks, D.O.'s NPI number?
Jules A. Marks, D.O.'s National Provider Identifier (NPI) is 1346228814, issued on Jan 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jules A. Marks, D.O. located?
The NPPES record lists a practice address at 1450 Busch Parkway, Buffalo Grove, IL, 60089. Phone: (847) 537-7744. Providers update this record themselves, so call before visiting.
How can I verify Jules A. Marks, D.O.'s license?
NPPES lists Illinois license number 03684408, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.