Ahmad Osama Rez, M.D
Hospitalist Physician · Alton, IL
Ahmad Osama Rez, M.D is a hospitalist physician with a practice address in Alton, Illinois, and NPI 1356537179, issued on Sep 16, 2007. Check the license (Illinois 036.131216, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ahmad Osama Rez
- Credential
- M.D
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 036.131216 IL
036131216 IL
2010014085 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1 Saint Anthonys Way, Alton, IL 62002
- Phone
- (314) 317-0600
- Enumerated
- Sep 16, 2007
- Record last updated
- Sep 19, 2025
- Fax
- (314) 317-0606
- Medicare enrollment
- Enrolled (PECOS I20100818000219); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →
Also registered at 1 Saint Anthonys Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katie Albrecht, NP-CFamily Nurse Practitioner1528735149
- Sara Bennett, LCSWClinical Social Worker1447884481
- Natasha Cheek, CRNACertified Registered Nurse Anesthetist1023330057
- Carolann Coates, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1568205953
- John Conti, PA-CPhysician Assistant1912432766
- Kristina Davis, MS CCC-SLPSpeech-Language Pathologist1689986705
Verify Ahmad Osama Rez 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 036.131216Check 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% more Medicare Part D claims than the average hospitalist physician in 2024
709 Medicare Part D claims for 235 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Amlodipine Besylate45 claims
- Atorvastatin Calcium36 claims
- Metoprolol Tartrate35 claims
- Furosemide34 claims
- Prednisone34 claims
- Carvedilol31 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.
Bills Medicare through 2 group practices
- Galen Inpatient Physicians PCFenton, MO
- Physician Groups LCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ahmad Osama Rez among 1,535 hospitalist physician records in Illinois
Ahmad Osama Rez, M.D is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 12% of them.
- NPI issued2007 · 12% of these records are older, 81% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2003 · median 2013 among the 1,339 with a school on file
- Record last updated2025 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 hospitalist physician records list a practice address in Alton
They are 16 of the 1,113 NPPES records with a practice address in Alton, and 1,535 hospitalist physician records in Illinois.
All 1,535 in Illinois → Every provider in Alton → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Olufunmilola Ajala, MDAlton, IL 620021821618760
- Juletta Avagyan, M.D.Alton, IL 620021013278944
- Vineela Bandarupalli, MDAlton, IL 620021700174562
- Jonathan Burt, MDAlton, IL 620021215421805
- Ibrahim Elayyan, MDAlton, IL 620021023207115
- Kiet Huynh, MDAlton, IL 620021831769637
- Nazanin Kheirkhahan, MDAlton, IL 620021811568504
- Matthew Nations, D.O.Alton, IL 620021073017638
Common questions
What is Ahmad Osama Rez, M.D's NPI number?
Ahmad Osama Rez, M.D's National Provider Identifier (NPI) is 1356537179, issued on Sep 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ahmad Osama Rez, M.D located?
The NPPES record lists a practice address at 1 Saint Anthonys Way, Alton, IL, 62002. Phone: (314) 317-0600. Providers update this record themselves, so call before visiting.
How can I verify Ahmad Osama Rez, M.D's license?
NPPES lists Illinois license number 036.131216, 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 Ahmad Osama Rez, M.D prescribe under Medicare Part D?
In 2024, Ahmad Osama Rez, M.D had 709 Medicare Part D claims for 235 beneficiaries; the average among hospitalist physician prescribers was 521. 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.