Dr. William A. Rizk, MD
- Medicare services, 2024
- 18
- Medicare patients, 2024
- 49
- Part D claims, 2024
- 54
- MIPS score, 2024
- 89
- Hospital affiliations
- 1
- Practice address
- 1501 East Tenth Street, Atlantic, IA 50022
- Practice phone
- Call (712) 243-3250
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rizk'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. William A. Rizk is a general surgeon in Atlantic, Iowa
Dr. Rizk practices at Cass County Memorial Hospital in Atlantic, Iowa, part of Cold Springs Park Officer.
Dr. Rizk's NPI, 1659347128, was assigned on February 24, 2006. Dr. Rizk graduated from Sanford School of Medicine of University of South Dakota in 1994. Dr. Rizk holds South Dakota license 4638.
- NPI
- 1659347128NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658264411
- NPI enumeration date
- February 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (712) 243-3250
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William A. Rizk practices at Cass County Memorial Hospital in Atlantic, Iowa
Dr. Rizk's primary practice is Cass County Memorial Hospital, at 1501 East Tenth Street, Atlantic, IA 50022 in Cass County. The practice phone is (712) 243-3250.
- Cass County Memorial Hospital1501 East Tenth Street, Atlantic, IA 50022 · Cass CountyPhone(712) 243-3250
Source: Dmand AI Affiliation Data
Dr. William A. Rizk is affiliated with 1 site of care and 1 medical group
Dr. Rizk's primary practice is Cass County Memorial Hospital in Atlantic, Iowa, part of Cold Springs Park Officer. The medical group on file is Cass Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William A. Rizk's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rizk practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cass County Memorial Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Cold Springs Park Officer and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William A. Rizk is one of 317 general surgeons in Iowa
Surgery is Dr. Rizk's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Rizk is licensed in South Dakota.
Specialties and state licenses
- Surgery, South DakotaPrimary
General surgeons near Dr. Rizk
Counts of general surgeons 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. William A. Rizk billed Medicare for 18 services in 2024
CMS data shows 18 Medicare services from Dr. Rizk across 1 procedure code in 2024, all of them office visits, for 49 Medicare patients. Medicare paid $1,122 for them. Every service was in an office.
Dr. Rizk's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1412024: 1887%
Dr. Rizk compared with the Iowa median for general surgeons, 2024
- Dr. Rizk
- Iowa median
- Medicare services
- 18vs 16489% below
- Medicare patients
- 49vs 14666% below
- Part D claims
- 20vs 4353% below
Medians across 332 general surgeons in Iowa with Dmand AI profiles that report each measure.
Dr. Rizk'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rizk and other general surgeons in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William A. Rizk treated 49 Medicare patients in 2024, average age 71
CMS counts 49 Medicare patients who saw Dr. Rizk in 2024. The largest group is 65 to 74, with 29 patients. 75% of them have high blood pressure, and 63% have high cholesterol. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Rizk's median patient age at 63, with 75% women.
Dr. Rizk's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Rizk's Medicare patients by sex, 2024
- Women3367%
- Men1633%
Chronic conditions among Dr. Rizk's Medicare patients, 2024
- High blood pressure75%
- High cholesterol63%
- Arthritis43%
- Diabetes39%
- Anxiety37%
- Chronic kidney disease37%
- Mood disorders33%
- Depression31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rizk's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women75%
- Men25%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William A. Rizk wrote 54 Medicare Part D claims in 2024
In 2024, Dr. Rizk wrote 54 Medicare Part D claims for 22 patients. 96% of them were for generic drugs. CMS names the drug for 20 of them, across 1 drug with 11 or more claims each, at $288 in total drug cost. In 2023, CMS named 30 claims across 1 drug.
Dr. Rizk's Part D claims by kind of drug, 2024
- Generic52 claims96%
- Brand-name and other2 claims4%
Dr. Rizk'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. Rizk's Part D claims, 2024
- Antibiotics22%12 of 54 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: 302024: 2033%
Drugs named by CMS: 1 in 2024, 1 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. William A. Rizk scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Rizk for performance year 2024, reported through an alternative payment model (APM). Dr. Rizk accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Rizk's MIPS scores, performance year 2024
- 89of 100Final score
- 82.5of 100Quality
- 89of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. William A. Rizk received $2,118 in industry payments from 2016 to 2025
CMS Open Payments shows 25 general payments to Dr. Rizk from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 50% of the total. Apollo Endosurgery US Inc paid the most, $1,027.
General payments to Dr. Rizk by program year, 2016 to 2025
General payments to Dr. Rizk by kind, 2016 to 2025
- Food and beverage$1,05950%
- Travel and lodging$1,02748%
- Education$321%
Companies that paid Dr. Rizk the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William A. Rizk graduated from Sanford School of Medicine of University of South Dakota
Dr. Rizk graduated from Sanford School of Medicine of University of South Dakota in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William A. Rizk'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. William A. Rizk
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. William A. Rizk's NPI number?
Dr. William A. Rizk's NPI number is 1659347128. It was assigned on February 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William A. Rizk?
Dr. William A. Rizk is a general surgeon in Atlantic, Iowa. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. William A. Rizk practice?
Dr. Rizk practices at 1501 East Tenth Street, Atlantic, IA 50022. Dr. Rizk's primary practice is Cass County Memorial Hospital in Atlantic, Iowa, part of Cold Springs Park Officer.
What is Dr. William A. Rizk's office phone number?
The practice phone on file for Dr. Rizk is (712) 243-3250.
What is Dr. William A. Rizk's medical license number?
Dr. Rizk holds South Dakota license 4638.
Which hospitals is Dr. William A. Rizk affiliated with?
Dr. Rizk practices at Cass County Memorial Hospital in Atlantic, Iowa.
What medical group is Dr. William A. Rizk part of?
Dr. Rizk is linked to Cass Health.
Does Dr. William A. Rizk accept Medicare?
Yes. CMS data shows Dr. Rizk billed Medicare for 18 services in 2024, and Dr. Rizk accepts Medicare assignment.
What is Dr. William A. Rizk's MIPS score?
Dr. Rizk's MIPS final score for performance year 2024 is 89 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. William A. Rizk see?
CMS counts 49 Medicare patients who saw Dr. Rizk in 2024, with an average age of 71.
Show 5 more questionsShow fewer questions
What services does Dr. William A. Rizk bill to Medicare?
In 2024, Dr. Rizk's most billed Medicare services were office visit, established patient (99213).
Where did Dr. William A. Rizk go to medical school?
Dr. Rizk graduated from Sanford School of Medicine of University of South Dakota in 1994.
What drugs does Dr. William A. Rizk prescribe most?
In 2024 Medicare Part D data, Dr. Rizk's most prescribed drugs by claims were Pantoprazole Sodium.
Has Dr. William A. Rizk received payments from drug or device companies?
CMS Open Payments shows $2,118 in general payments to Dr. Rizk from 7 companies from 2016 to 2025. The largest total came from Apollo Endosurgery US Inc.
How long has Dr. William A. Rizk been practicing?
Dr. Rizk graduated from medical school in 1994, 32 years ago.
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