Ghassan Zalzaleh, MD
Hematology & Oncology Physician · Oak Lawn, IL
Ghassan Zalzaleh, MD is a hematology & oncology physician with a practice address in Oak Lawn, Illinois, and NPI 1992704035, issued on Jul 20, 2005. Check the license (Illinois 036089713, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ghassan Zalzaleh
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 036089713 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4400 W 95TH St, Oak Lawn, IL 60453
- Phone
- (708) 424-9710
- Enumerated
- Jul 20, 2005
- Record last updated
- Jul 10, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (708) 424-4331
- Medicare enrollment
- Enrolled (PECOS I20040930000994); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 4400 W 95TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samweel Akhnoukh, RPTPhysical Therapist1265561427
- Danielle Amato, PA-CSurgical Physician Assistant1326278284
- John Ancona, PAPhysician Assistant1003891649
- Susan Apolinario, M.D.Allergy & Immunology Physician1174522171
- Humera Asem, MDObstetrics & Gynecology Physician1366621054
- Abbey Baker, PA-CSurgical Physician Assistant1861492571
Verify Ghassan Zalzaleh 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 036089713Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
564 Medicare Part D claims for 173 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims. 58 claims were for opioids.
Most prescribed
- Eliquis64 claims
- Prednisone44 claims
- Hydrocodone-Acetaminophen33 claims
- Revlimid28 claims
- Imatinib Mesylate23 claims
- Hydroxyurea21 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: $16,185.09
199 payments; by number, the most common kind was food and beverage; the largest payer was Emd Serono, Inc. 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
- Affiliated Oncologists LLCChicago Ridge, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ghassan Zalzaleh among 666 hematology & oncology physician records in Illinois
Ghassan Zalzaleh, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1987 · median 2003 among the 461 with a school on file
- Record last updated2015 · 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 Oak Lawn → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Riaz Elahi, MDOak Lawn, IL 604531356421325
- Rami Haddad, MDOak Lawn, IL 604531710072624
- Amar Hamad, MDOak Lawn, IL 604531598765166
- Mahir KhanOak Lawn, IL 604531902364938
- Vasantha Kumaraiah, MDOak Lawn, IL 604531245307305
- Rajalaxmi McKenna, M.D.Oak Lawn, IL 604531073539680
- Imran Nizamuddin, MDOak Lawn, IL 604531124587365
- Mauna Pandya, MDOak Lawn, IL 604531356439178
Common questions
What is Ghassan Zalzaleh, MD's NPI number?
Ghassan Zalzaleh, MD's National Provider Identifier (NPI) is 1992704035, issued on Jul 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ghassan Zalzaleh, MD located?
The NPPES record lists a practice address at 4400 W 95TH St, Oak Lawn, IL, 60453. Phone: (708) 424-9710. Providers update this record themselves, so call before visiting.
How can I verify Ghassan Zalzaleh, MD's license?
NPPES lists Illinois license number 036089713, 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 Ghassan Zalzaleh, MD prescribe under Medicare Part D?
In 2024, Ghassan Zalzaleh, MD had 564 Medicare Part D claims for 173 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.