Radwan H. Diab, M.D.
Hematology (Internal Medicine) Physician · Decatur, IL
Radwan H. Diab, M.D. is a hematology (internal medicine) physician with a practice address in Decatur, Illinois, and NPI 1699398297, issued on May 19, 2020. Check the license (Illinois 036177147, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Radwan H. Diab
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License numbers
- 036177147 IL
94-10218 KS
Self-reported in NPPES; status is on the state search - Practice location
- 210 W Mckinley Ave Ste 1, Decatur, IL 62526
- Phone
- (217) 876-6600
- Enumerated
- May 19, 2020
- Record last updated
- Apr 15, 2026
- Fax
- (217) 876-6606
- Medicare enrollment
- Enrolled (PECOS I20260424001011); may accept Medicare assignment
- Entity
- Type 1 · individual
Also registered at 210 W Mckinley Ave Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Esparaz, M.D.Hematology & Oncology Physician1275502940
- Sarah Mackey, FNP-CNurse Practitioner1275102113
- Shannon Nail, LCPCProfessional Counselor1568059764
- Evelena Ontiveros, MD PHDHematology & Oncology Physician1689886962
- Thomas Tarter, M.D.Surgical Oncology Physician1114913225
- Christel Wheeler, FNPFamily Nurse Practitioner1588133003
Verify Radwan H. Diab 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 036177147Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
61 Medicare Part D claims for 22 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Prednisone12 claims
- Abiraterone Acetate11 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: $483.61
16 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 721 providers of this specialty with any payment received $13,778.35 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.
Hematology (Internal Medicine) Physician providers in Illinois
There are 47 hematology (internal medicine) physician records in Illinois.
Other hematology (internal medicine) physician records in Illinois
- Angela Ai, MDMaywood, IL1982282364
- Anjana Chandran, MDChicago, IL1902292253
- Irene Dehghan-Paz, MDChicago, IL1801053905
- Kunal Desai, MD MBA MSChicago, IL1982100012
- Neil Dunavin, M.D.Zion, IL1578798369
- Michael Ellison, MDGlenview, IL1740357797
- Olga Frankfurt, MDChicago, IL1962492611
- Estefania Gauto-Mariotti, MDMaywood, IL1972032621
- Sefer Gezer, M.D.Chicago, IL1700845153
- Alla Gimelfarb, MDGlenview, IL1578721254
Common questions
What is Radwan H. Diab, M.D.'s NPI number?
Radwan H. Diab, M.D.'s National Provider Identifier (NPI) is 1699398297, issued on May 19, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Radwan H. Diab, M.D. located?
The NPPES record lists a practice address at 210 W Mckinley Ave Ste 1, Decatur, IL, 62526. Phone: (217) 876-6600. Providers update this record themselves, so call before visiting.
How can I verify Radwan H. Diab, M.D.'s license?
NPPES lists Illinois license number 036177147, 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 Radwan H. Diab, M.D. prescribe under Medicare Part D?
In 2024, Radwan H. Diab, M.D. had 61 Medicare Part D claims for 22 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. 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.