Bassam N. Maalouf, M.D.
Hematology & Oncology Physician · O Fallon, IL
Bassam N. Maalouf, M.D. is a hematology & oncology physician with a practice address in O Fallon, Illinois, and NPI 1720173438, issued on Oct 4, 2006. Check the license (Illinois 036133141, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Bassam N. Maalouf
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 036133141 IL
Self-reported in NPPES; status is on the state search - Practice location
- 321 Regency Park Ste 100, O Fallon, IL 62269
- Phone
- (618) 416-7970
- Enumerated
- Oct 4, 2006
- Record last updated
- Mar 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (618) 416-7971
- Medicaid ID
- 036133141 IL
- Medicare enrollment
- Enrolled (PECOS I20130719000497); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 321 Regency Park Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachael Demattei, APRNNurse Practitioner1891443289
- Bachir Farah, M.D.Hematology & Oncology Physician1336370915
- Justin Floyd, DOMedical Oncology Physician1629164678
- Ryan Mueller, MDRadiation Oncology Physician1912571654
- Julianne Tomac, DNP, FNP-CFamily Nurse Practitioner1245018944
- Mark Walshauser, M.D.Hematology & Oncology Physician1306020664
Verify Bassam N. Maalouf 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 036133141Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average hematology & oncology physician in 2024
2,228 Medicare Part D claims for 296 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 341 claims were for opioids.
Most prescribed
- Anastrozole188 claims
- Ondansetron Hcl181 claims
- Hydrocodone-Acetaminophen155 claims
- Prochlorperazine Maleate121 claims
- Potassium Chloride107 claims
- Prednisone72 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 practice group's MIPS final score for 2023 (Medicare payment program): 77.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,766.60
159 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Cancer Care Specialists OF Central Illinois SCEffingham, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bassam N. Maalouf among 666 hematology & oncology physician records in Illinois
Bassam N. Maalouf, M.D. is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 57% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2002 · median 2003 among the 461 with a school on file
- Record last updated2021 · 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 207RH0003X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Illinois
There are 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in O Fallon → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Bachir Farah, M.D.O Fallon, IL 622691336370915
- Mark Walshauser, M.D.O Fallon, IL 622691306020664
- Muhammad Ali, M.DQuincy, IL 623011306826250
- Kellie Flippin, MDQuincy, IL 623011013193705
- Christian Khoury, MDQuincy, IL 623011477694867
- Daniel Koh, MDQuincy, IL 623011306946033
- Mohammed Memon, M.D.Quincy, IL 623011164577102
- Raymond Smith, MDQuincy, IL 623011477526259
Common questions
What is Bassam N. Maalouf, M.D.'s NPI number?
Bassam N. Maalouf, M.D.'s National Provider Identifier (NPI) is 1720173438, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bassam N. Maalouf, M.D. located?
The NPPES record lists a practice address at 321 Regency Park Ste 100, O Fallon, IL, 62269. Phone: (618) 416-7970. Providers update this record themselves, so call before visiting.
How can I verify Bassam N. Maalouf, M.D.'s license?
NPPES lists Illinois license number 036133141, 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 Bassam N. Maalouf, M.D. prescribe under Medicare Part D?
In 2024, Bassam N. Maalouf, M.D. had 2,228 Medicare Part D claims for 296 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Bassam N. Maalouf, M.D.'s MIPS final score?
The 2023 MIPS final score is 77.7 of 100, reported for the practice group. 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.