Gary R. Lewison, MD
Internal Medicine Physician · East Dundee, IL
Gary R. Lewison, MD is an internal medicine physician with a practice address in East Dundee, Illinois, and NPI 1902892490, issued on Sep 21, 2005. Check the license (Illinois 036-066163, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gary R. Lewison
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-066163 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1141 East Main Street, East Dundee, IL 60118
- Phone
- (847) 428-3322
- Enumerated
- Sep 21, 2005
- Record last updated
- Sep 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1141 East Main Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Todd Gephart, MDInternal Medicine Physician1467448969
Verify Gary R. Lewison 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 036-066163Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $225.00
1 payment: gift; the largest payer was Sekisui Diagnostics, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Gary R. Lewison among 7,238 internal medicine physician records in Illinois
Gary R. Lewison, MD 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 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).
7 internal medicine physician records list a practice address in East Dundee
They are 7 of the 66 NPPES records with a practice address in East Dundee, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in East Dundee → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Faiza Ahmed, MDEast Dundee, IL 601181265718886
- Alan Brongiel, M.D.East Dundee, IL 601181689785966
- Monica Gavran, MDWest Dundee, IL 601181326123530
- Todd Gephart, MDEast Dundee, IL 601181467448969
- Jemini Ignacio, MDEast Dundee, IL 601181912993429
- Nathan Kakish, MDWest Dundee, IL 601181518975309
- Srinivas Ravanam, M.D.East Dundee, IL 601181346294469
- Steven Rehusch, M.D.East Dundee, IL 601181962513242
Common questions
What is Gary R. Lewison, MD's NPI number?
Gary R. Lewison, MD's National Provider Identifier (NPI) is 1902892490, issued on Sep 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gary R. Lewison, MD located?
The NPPES record lists a practice address at 1141 East Main Street, East Dundee, IL, 60118. Phone: (847) 428-3322. Providers update this record themselves, so call before visiting.
How can I verify Gary R. Lewison, MD's license?
NPPES lists Illinois license number 036-066163, 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. 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.