Neilayan Sen, M.D.
Radiation Oncology Physician · Chicago, IL
Neilayan Sen, M.D. is a radiation oncology physician with a practice address in Chicago, Illinois, and NPI 1407101314, issued on Jul 17, 2012. Check the license (Illinois 125.061125, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Neilayan Sen
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 125.061125 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1653 W Congress Pkwy, Chicago, IL 60612
- Phone
- (312) 942-5000
- Enumerated
- Jul 17, 2012
- Record last updated
- Jul 17, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200128001401); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 277 in Illinois → Look up another NPI →
Also registered at 1653 W Congress Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raid Abdulla, MDPediatric Cardiology Physician1710037742
- Pooja AgarwalPsychiatry Physician1407411689
- Heidi Aguilar, CRNACertified Registered Nurse Anesthetist1043703796
- Jenny AhnEmergency Registered Nurse1124836622
- Marwah Al Tekreeti, MDAnatomic Pathology & Clinical Pathology Physician1891539268
- Laila Abdulla Al-Harthy, RNRegistered Nurse1619832722
Verify Neilayan Sen 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 125.061125Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average radiation oncology physician in 2024
275 Medicare Part D claims for 122 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 43 claims were for opioids.
Most prescribed
- Tamsulosin Hcl70 claims
- Oxycodone Hcl32 claims
- Dexamethasone27 claims
- Nystatin26 claims
- Lidocaine Hcl Viscous22 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): 0 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: $16.73
1 payment: food and beverage; the largest payer was Genmab U.S., Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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.
Bills Medicare through one group practice
- Radiation Oncology Associates, PAAugusta, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Neilayan Sen among 277 radiation oncology physician records in Illinois
Neilayan Sen, M.D. is one of 277 radiation oncology physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 70% of them.
- NPI issued2012 · 70% of these records are older, 27% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2012 · median 2004 among the 184 with a school on file
- Record last updated2012 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Illinois
There are 277 radiation oncology physician records in Illinois.
All 277 in Illinois → Every provider in Chicago → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ross Abrams, M.D.Chicago, IL 606121356317564
- Sobiya Ansari, M.D.Chicago, IL 606121336554666
- Philip Blumenfeld, M.D.Chicago, IL 606121417397449
- Nathaniel Camden, MDChicago, IL 606121629502208
- Thomas Kim, M.D.Chicago, IL 606121932466208
- Mark Korpics, MDChicago, IL 606121407382526
- Gaurav Marwaha, M.D.Chicago, IL 606121669798062
- Christian Olortegui, M.D.Chicago, IL 606121033564018
Common questions
What is Neilayan Sen, M.D.'s NPI number?
Neilayan Sen, M.D.'s National Provider Identifier (NPI) is 1407101314, issued on Jul 17, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Neilayan Sen, M.D. located?
The NPPES record lists a practice address at 1653 W Congress Pkwy, Chicago, IL, 60612. Phone: (312) 942-5000. Providers update this record themselves, so call before visiting.
How can I verify Neilayan Sen, M.D.'s license?
NPPES lists Illinois license number 125.061125, 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 Neilayan Sen, M.D. prescribe under Medicare Part D?
In 2024, Neilayan Sen, M.D. had 275 Medicare Part D claims for 122 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Neilayan Sen, M.D.'s MIPS final score?
The 2023 MIPS final score is 0 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.