Dr. Ahmad Osama Rez, MD
- Medicare services, 2024
- 1,157
- Medicare patients, 2024
- 328
- Part D claims, 2024
- 709
- MIPS score, 2024
- 82
- Hospital affiliations
- 3
- Practice address
- 1015 Bowles, Fenton, MO 63026
- Practice phone
- Call (636) 496-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rez's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Ahmad Osama Rez is a hospitalist in Fenton, Missouri
Dr. Rez practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care.
Dr. Rez's NPI, 1356537179, was assigned on September 16, 2007. Dr. Rez holds Illinois license 036.131216.
- NPI
- 1356537179NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951435510
- NPI enumeration date
- September 16, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 496-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ahmad Osama Rez practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri
Dr. Rez's primary practice is SSM Health St. Clare Hospital - Fenton, at 1015 Bowles, Fenton, MO 63026 in Jefferson County. The practice phone is (636) 496-2000.
- SSM Health St. Clare Hospital - Fenton1015 Bowles, Fenton, MO 63026 · Jefferson CountyPhone(636) 496-2000
Source: Dmand AI Affiliation Data
Dr. Ahmad Osama Rez is affiliated with 5 sites of care and 4 medical groups
Dr. Rez's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dr. Rez is also affiliated with Missouri Baptist Medical Center. The medical group on file is Vituity. Dmand AI also links Dr. Rez to 1 more hospital, 3 medical groups, 1 hospice and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ahmad Osama Rez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rez practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Clare Hospital - Fenton | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ahmad Osama Rez is one of 735 hospitalists in Missouri
Hospitalist is Dr. Rez's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dmand AI has Dr. Rez's licenses on file in 2 states: Illinois and Missouri.
Specialties and state licenses
- Hospitalist, IllinoisPrimary
- Missouri license
Hospitalists near Dr. Rez
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ahmad Osama Rez billed Medicare for 1,157 services in 2024
CMS data shows 1,157 Medicare services from Dr. Rez across 6 procedure codes in 2024, for 328 Medicare patients. Medicare paid $99,909 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rez's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8732024: 1,15733%
Dr. Rez compared with the Missouri median for hospitalists, 2024
- Dr. Rez
- Missouri median
- Medicare services
- 1,157vs 4342.7 times
- Medicare patients
- 328vs 19172% above
- Part D claims
- 421vs 984.3 times
Medians across 659 hospitalists in Missouri with Dmand AI profiles that report each measure.
Dr. Rez's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ahmad Osama Rez treated 328 Medicare patients in 2024, average age 76
CMS counts 328 Medicare patients who saw Dr. Rez in 2024. The largest group is 75 to 84, with 127 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.65, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Rez's median patient age at 76, with 53% women.
Dr. Rez's Medicare patients by age, 2024
Dr. Rez's Medicare patients by sex, 2024
- Women16450%
- Men16450%
Chronic conditions among Dr. Rez's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Chronic kidney disease57%
- Ischemic heart disease52%
- Heart failure51%
- Mood disorders48%
- Anxiety47%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ahmad Osama Rez wrote 709 Medicare Part D claims in 2024
In 2024, Dr. Rez wrote 709 Medicare Part D claims for 235 patients. 86% of them were for generic drugs. CMS names the drug for 421 of them, across 17 drugs with 11 or more claims each, at $38,028 in total drug cost. In 2023, CMS named 425 claims across 19 drugs.
Dr. Rez's Part D claims by kind of drug, 2024
- Generic612 claims86%
- Brand-name and other97 claims14%
Dr. Rez's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Rez's Part D claims, 2024
- Opioids5%32 of 709 claims
- Antibiotics12%87 of 709 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4252024: 4211%
Drugs named by CMS: 17 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ahmad Osama Rez scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Rez for performance year 2024, reported as part of a group. Dr. Rez accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Rez's MIPS scores, performance year 2024
- 82of 100Final score
- 65.6of 100Quality
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Ahmad Osama Rez received $274 in industry payments from 2020 to 2022
CMS Open Payments shows 7 general payments to Dr. Rez from 3 drug and device companies from 2020 to 2022. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $114.
General payments to Dr. Rez by program year, 2020 to 2022
Companies that paid Dr. Rez the most, 2020 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ahmad Osama Rez's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ahmad Osama Rez
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ahmad Osama Rez's NPI number?
Dr. Ahmad Osama Rez's NPI number is 1356537179. It was assigned on September 16, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ahmad Osama Rez?
Dr. Ahmad Osama Rez is a hospitalist in Fenton, Missouri. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Ahmad Osama Rez practice?
Dr. Rez practices at 1015 Bowles, Fenton, MO 63026. Dr. Rez's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dmand AI also links Dr. Rez to 1 hospital, 3 medical groups, 1 hospice and 1 hospital outpatient department.
What is Dr. Ahmad Osama Rez's office phone number?
The practice phone on file for Dr. Rez is (636) 496-2000.
What is Dr. Ahmad Osama Rez's medical license number?
Dr. Rez holds Illinois license 036.131216, one of the licenses on file in 2 states.
Which states has Dr. Ahmad Osama Rez been licensed in?
Dmand AI has state licenses on file for Dr. Rez in Illinois and Missouri.
Which hospitals is Dr. Ahmad Osama Rez affiliated with?
Dr. Rez practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri. Dr. Rez is also affiliated with Missouri Baptist Medical Center. Dmand AI links Dr. Rez to 1 more hospital.
What medical group is Dr. Ahmad Osama Rez part of?
Dr. Rez is linked to Vituity. Dmand AI links Dr. Rez to 3 more medical groups.
Does Dr. Ahmad Osama Rez accept Medicare?
Yes. CMS data shows Dr. Rez billed Medicare for 1,157 services in 2024, and Dr. Rez accepts Medicare assignment.
What is Dr. Ahmad Osama Rez's MIPS score?
Dr. Rez's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Ahmad Osama Rez see?
CMS counts 328 Medicare patients who saw Dr. Rez in 2024, with an average age of 76.
What services does Dr. Ahmad Osama Rez bill to Medicare?
In 2024, Dr. Rez's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99232).
What drugs does Dr. Ahmad Osama Rez prescribe most?
In 2024 Medicare Part D data, Dr. Rez's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Metoprolol Tartrate.
Has Dr. Ahmad Osama Rez received payments from drug or device companies?
CMS Open Payments shows $274 in general payments to Dr. Rez from 3 companies from 2020 to 2022. The largest total came from Allergan Inc.
How long has Dr. Ahmad Osama Rez been practicing?
Dr. Rez graduated from medical school in 2003, 23 years ago.
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