Dennis Chan, MD
Radiation Oncology Physician · Maywood, IL
Dennis Chan, MD is a radiation oncology physician with a practice address in Maywood, Illinois, and NPI 1679005243, issued on Apr 1, 2017. Check the license (Illinois 125.071442, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Dennis Chan
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 125.071442 IL
4301115711 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2160 S 1St Ave, Maywood, IL 60153
- Phone
- (888) 584-7888
- Enumerated
- Apr 1, 2017
- Record last updated
- Oct 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20220909000794); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 2017
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 277 in Illinois → Look up another NPI →
Also registered at 2160 S 1St Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zaid Abdelsattar, MD, MSCThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1760793293
- Gerges Abdelsayed, MBBCH BAODiagnostic Radiology Physician1942902606
Verify Dennis Chan 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 125.071442Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average radiation oncology physician in 2024
112 Medicare Part D claims for 55 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 18 claims were for opioids.
Most prescribed
- Pantoprazole Sodium15 claims
- Ssd14 claims
- Gabapentin11 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.
Industry payments in 2024: $30.13
1 payment: food and beverage; the largest payer was Intuitive Surgical, 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 LLCArlington Heights, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dennis Chan among 277 radiation oncology physician records in Illinois
Dennis Chan, MD 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 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2017 · median 2004 among the 184 with a school on file
- Record last updated2019 · 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 Maywood → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Menal BhandariMaywood, IL 601531134895758
- Alec BlockMaywood, IL 601531124375274
- Anupama Chundury, M.D., M.S.Maywood, IL 601531407199250
- Bahman Emami, MDMaywood, IL 601531588641450
- Matthew Harkenrider, M.D.Maywood, IL 601531952577967
- Courtney Hentz, MDMaywood, IL 601531629495825
- Samar Khan, MSMaywood, IL 601531588321707
- Nagendra Koneru, M.D.Maywood, IL 601531508989260
Common questions
What is Dennis Chan, MD's NPI number?
Dennis Chan, MD's National Provider Identifier (NPI) is 1679005243, issued on Apr 1, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Dennis Chan, MD located?
The NPPES record lists a practice address at 2160 S 1St Ave, Maywood, IL, 60153. Phone: (888) 584-7888. Providers update this record themselves, so call before visiting.
How can I verify Dennis Chan, MD's license?
NPPES lists Illinois license number 125.071442, 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 Dennis Chan, MD prescribe under Medicare Part D?
In 2024, Dennis Chan, MD had 112 Medicare Part D claims for 55 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.