Gerald H. Lewis, M.D
Internal Medicine Physician · Des Plaines, IL
Gerald H. Lewis, M.D is an internal medicine physician with a practice address in Des Plaines, Illinois, and NPI 1225102478, issued on Nov 20, 2006. Check the license (Illinois 036055258, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gerald H. Lewis
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036055258 IL
Self-reported in NPPES; status is on the state search - Practice location
- 150 N River RD, Des Plaines, IL 60016
- Phone
- (847) 298-0310
- Enumerated
- Nov 20, 2006
- Record last updated
- Feb 7, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (847) 298-5939
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 150 N River RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Cahill, D.O.Internal Medicine Physician1578569505
- Gerald Cohen, M.DInternal Medicine Physician1225100209
- Kenneth Crane, M.D.Rheumatology Physician1487760286
- Raymond Daou, M.D.Otolaryngology Physician1952492563
- Agnieszka Darzynski, PTPhysical Therapist1972550879
- Purvi Gabhawala, AGNPAdult Health Nurse Practitioner1104589209
Verify Gerald H. Lewis 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 036055258Check 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 internal medicine physician in 2024
37 Medicare Part D claims for 13 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Gerald H. Lewis among 7,238 internal medicine physician records in Illinois
Gerald H. Lewis, M.D 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2011 · 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).
29 internal medicine physician records list a practice address in Des Plaines
They are 29 of the 1,164 NPPES records with a practice address in Des Plaines, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Des Plaines → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Artinian, MDDes Plaines, IL 600161073511267
- Janet Barczyk, M.D.Des Plaines, IL 600161801884101
- Glenn Cabin, MDDes Plains, IL 600161194743781
- Timothy Cahill, D.O.Des Plaines, IL 600161578569505
- Gerald Cohen, M.DDes Plaines, IL 600161225100209
- Robin Dyer, M.D.Des Plaines, IL 600161528056918
- Michael Gill, MD PHDDes Plaines, IL 600161093782666
- Sarmila Govindan, MDDes Plaines, IL 600161548371305
Common questions
What is Gerald H. Lewis, M.D's NPI number?
Gerald H. Lewis, M.D's National Provider Identifier (NPI) is 1225102478, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gerald H. Lewis, M.D located?
The NPPES record lists a practice address at 150 N River RD, Des Plaines, IL, 60016. Phone: (847) 298-0310. Providers update this record themselves, so call before visiting.
How can I verify Gerald H. Lewis, M.D's license?
NPPES lists Illinois license number 036055258, 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 Gerald H. Lewis, M.D prescribe under Medicare Part D?
In 2024, Gerald H. Lewis, M.D had 37 Medicare Part D claims for 13 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.