Michael Gene Feinzimer, MD
Hospitalist Physician · Chicago, IL
Michael Gene Feinzimer, MD is a hospitalist physician with a practice address in Chicago, Illinois, and NPI 1457455065, issued on Sep 12, 2006. Check the license (Illinois 036043389, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Michael Gene Feinzimer
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 036043389 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5145 N California Ave, Chicago, IL 60625
- Phone
- (773) 878-8200
- Enumerated
- Sep 12, 2006
- Record last updated
- Oct 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicaid ID
- 036043389 IL
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →
Also registered at 5145 N California Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Gene Feinzimer 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 036043389Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average hospitalist physician in 2024
50 Medicare Part D claims, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Tramadol Hcl15 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.
Michael Gene Feinzimer among 1,535 hospitalist physician records in Illinois
Michael Gene Feinzimer, MD is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 88% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileNo · 87% of these records are
- Record last updated2017 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Illinois
There are 1,535 hospitalist physician records in Illinois.
All 1,535 in Illinois → Every provider in Chicago → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gregory Anderson, DOChicago, IL 606251255771358
- Jorge Chedrauy, MDChicago, IL 606251154617421
- Natalia Galkine, M.D.Chicago, IL 606251518177450
- Youshay Humayun, M.D.Chicago, IL 606251093010423
- Atika Khan, MDChicago, IL 606251174713648
- Asfahan Khan, D.O.Chicago, IL 606251861856247
- Ryan Levenhagen, DOChicago, IL 606251609289040
- Swathi Mothkur, MDChicago, IL 606251164505392
Common questions
What is Michael Gene Feinzimer, MD's NPI number?
Michael Gene Feinzimer, MD's National Provider Identifier (NPI) is 1457455065, issued on Sep 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Gene Feinzimer, MD located?
The NPPES record lists a practice address at 5145 N California Ave, Chicago, IL, 60625. Phone: (773) 878-8200. Providers update this record themselves, so call before visiting.
How can I verify Michael Gene Feinzimer, MD's license?
NPPES lists Illinois license number 036043389, 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 Michael Gene Feinzimer, MD prescribe under Medicare Part D?
In 2024, Michael Gene Feinzimer, MD had 50 Medicare Part D claims; the average among hospitalist physician prescribers was 521. 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.