Bassim Assioun, M.D.
Nephrology Physician · O Fallon, IL
Bassim Assioun, M.D. is a nephrology physician with a practice address in O Fallon, Illinois, and NPI 1669785408, issued on Jul 22, 2010. Check the license (Illinois 036137061, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Bassim Assioun
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 036137061 IL
2010015148 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL 62269
- Phone
- (618) 641-5803
- Enumerated
- Jul 22, 2010
- Record last updated
- Oct 7, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (618) 607-5116
- Medicare enrollment
- Enrolled (PECOS I20150601000657); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 3 Saint Elizabeth Blvd Ste 5000
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Roula Al-Dahhak, M.D.Neurology Physician1033116165
- Zachary Berg, M.D.Pulmonary Disease Physician1255741278
- Angela Croessman-Marshall, AGNP-CAdult Health Nurse Practitioner1023994274
- Randall Dooley, MDUrology Physician1619940640
- Allison Harris, PA-CPhysician Assistant1790588739
- Kostantinos Psihramis, M.D.Urology Physician1902889793
Verify Bassim Assioun 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 036137061Check 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 nephrology physician in 2024
3,017 Medicare Part D claims for 521 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Allopurinol611 claims
- Furosemide225 claims
- Amlodipine Besylate202 claims
- Lisinopril190 claims
- Calcitriol182 claims
- Losartan Potassium168 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): 94.6 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: $239.15
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Hshs Medical Group IncOfallon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bassim Assioun among 572 nephrology physician records in Illinois
Bassim Assioun, M.D. is one of 572 nephrology physician records with a practice address in Illinois. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 68% of them.
- NPI issued2010 · 68% of these records are older, 28% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2008 · median 2002 among the 433 with a school on file
- Record last updated2020 · 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 207RN0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Illinois
There are 572 nephrology physician records in Illinois.
All 572 in Illinois → Every provider in O Fallon → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Dan Evans, M.D.Quincy, IL 623011730152273
- Hrishikesh Ghanekar, MDQuincy, IL 623011629041686
- Thejeswi Pujar, M.DQuincy, IL 623011407008055
- Roula Tanios, M.D.Quincy, IL 623011205857141
- Ifath Bashiruddin, M.D.Belleville, IL 622261417060534
- Shabnam Darbari, MDBelleville, IL 622261225026016
- Rouba Ghoussoub, M.D.Belleville, IL 622261396964599
- Matthew Koch, MDBelleville, IL 622261962420448
Common questions
What is Bassim Assioun, M.D.'s NPI number?
Bassim Assioun, M.D.'s National Provider Identifier (NPI) is 1669785408, issued on Jul 22, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Bassim Assioun, M.D. located?
The NPPES record lists a practice address at 3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL, 62269. Phone: (618) 641-5803. Providers update this record themselves, so call before visiting.
How can I verify Bassim Assioun, M.D.'s license?
NPPES lists Illinois license number 036137061, 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 Bassim Assioun, M.D. prescribe under Medicare Part D?
In 2024, Bassim Assioun, M.D. had 3,017 Medicare Part D claims for 521 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Bassim Assioun, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 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.