Mitchell Posner
Surgical Oncology Physician · Chicago, IL
Mitchell Posner is a surgical oncology physician with a practice address in Chicago, Illinois, and NPI 1700941531, issued on Dec 22, 2006. Check the license (Illinois 036092015, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mitchell Posner
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 036092015 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave, Chicago, IL 60637
- Phone
- (888) 824-0200
- Enumerated
- Dec 22, 2006
- Record last updated
- Nov 20, 2025
- Medicare enrollment
- Enrolled (PECOS I20060426000932); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 71 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mitchell Posner 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 036092015Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average surgical oncology physician in 2024
26 Medicare Part D claims for 15 beneficiaries, against an average of 87 among the 1,237 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.
The MIPS final score for 2023 (Medicare payment program): 97.7 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).
Industry payments in 2024: $39.14
1 payment: food and beverage; the largest payer was Medtronic, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 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.
2 hospitals and group practices
- The University OF Chicago Medical CenterChicago, IL · Acute Care Hospitals4 of 5 stars
- University OF ChicagoChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mitchell Posner among 71 surgical oncology physician records in Illinois
Mitchell Posner is one of 71 surgical oncology physician records with a practice address in Illinois. 83% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 69% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1981 · median 2005 among the 55 with a school on file
- Record last updated2025 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Illinois
There are 71 surgical oncology physician records in Illinois.
All 71 in Illinois → Every provider in Chicago → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Jingjing AnChicago, IL 606371235692666
- Fadi Dahdaleh, M.D.Chicago, IL 606371235424656
- Olga Kantor, M.D.Chicago, IL 606371417202623
- Xavier Keutgen, M.D.Chicago, IL 606371831336528
- Jeffrey MatthewsChicago, IL 606371679540736
- Ryan Merkow, MDChicago, IL 606371396968889
- Mecker Moller, M.D.Chicago, IL 606371962601492
- Rohit Sharma, M.D.Chicago, IL 606371922265032
Common questions
What is Mitchell Posner's NPI number?
Mitchell Posner's National Provider Identifier (NPI) is 1700941531, issued on Dec 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mitchell Posner located?
The NPPES record lists a practice address at 5841 S Maryland Ave, Chicago, IL, 60637. Phone: (888) 824-0200. Providers update this record themselves, so call before visiting.
How can I verify Mitchell Posner's license?
NPPES lists Illinois license number 036092015, 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 Mitchell Posner prescribe under Medicare Part D?
In 2024, Mitchell Posner had 26 Medicare Part D claims for 15 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
What is Mitchell Posner's MIPS final score?
The 2023 MIPS final score is 97.7 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.