Claude Winchester Hamilton, M.D.
Internal Medicine Physician · Park Ridge, IL
Claude Winchester Hamilton, M.D. is an internal medicine physician with a practice address in Park Ridge, Illinois, and NPI 1518074087, issued on Aug 23, 2006. Check the license (Illinois 036081593, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Claude Winchester Hamilton
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036081593 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1400 Renaissance Dr, Park Ridge, IL 60068
- Phone
- (224) 938-9264
- Enumerated
- Aug 23, 2006
- Record last updated
- May 9, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (224) 938-9266
- Medicare enrollment
- Enrolled (PECOS I20040219000227); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1400 Renaissance Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Claude Winchester Hamilton 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 036081593Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average internal medicine physician in 2024
3,617 Medicare Part D claims for 260 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 257 claims were for opioids.
Most prescribed
- Tramadol Hcl159 claims
- Gabapentin124 claims
- Amlodipine Besylate122 claims
- Atorvastatin Calcium121 claims
- Furosemide94 claims
- Metformin Hcl83 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.
The MIPS final score for 2023 (Medicare payment program): 8.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Healing Hands Physicians IncSchaumburg, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Claude Winchester Hamilton among 7,238 internal medicine physician records in Illinois
Claude Winchester Hamilton, 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 fileYes · 50% of these records are
- Graduated1980 · median 2003 among the 3,580 with a school on file
- 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).
163 internal medicine physician records list a practice address in Park Ridge
They are 163 of the 2,577 NPPES records with a practice address in Park Ridge, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Park Ridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Voula Asimacopoulos, MDPark Ridge, IL 600681114920824
- Howard Becker, MDPark Ridge, IL 600681245269794
- Mark Conley, D.O.Park Ridge, IL 600681366471856
- Maribeth December, M.D.Park Ridge, IL 600681245275635
- Michael Greising, MDPark Ridge, IL 600681629071329
- Thomas Holmes, M.D.Park Ridge, IL 600681689603110
- Jaroslaw Leszczak, MDPark Ridge, IL 600681588606222
- Andrey Lev-Weissberg, MDPark Ridge, IL 600681245206655
Common questions
What is Claude Winchester Hamilton, M.D.'s NPI number?
Claude Winchester Hamilton, M.D.'s National Provider Identifier (NPI) is 1518074087, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Claude Winchester Hamilton, M.D. located?
The NPPES record lists a practice address at 1400 Renaissance Dr, Park Ridge, IL, 60068. Phone: (224) 938-9264. Providers update this record themselves, so call before visiting.
How can I verify Claude Winchester Hamilton, M.D.'s license?
NPPES lists Illinois license number 036081593, 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 Claude Winchester Hamilton, M.D. prescribe under Medicare Part D?
In 2024, Claude Winchester Hamilton, M.D. had 3,617 Medicare Part D claims for 260 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Claude Winchester Hamilton, M.D.'s MIPS final score?
The 2023 MIPS final score is 8.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.