Dr. Michael Frederick Rentz, MD, MPH
- Medicare services, 2024
- 602
- Medicare patients, 2024
- 415
- Part D claims, 2024
- 190
- Hospital affiliations
- 4
- Industry payments
- $125
- Practice address
- 1969 W Hart Rd, Beloit, WI 53511
- Practice phone
- Call (608) 364-5011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rentz's professional email, personal email and mobile number
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Dr. Michael Frederick Rentz is an emergency medicine physician in Beloit, Wisconsin
Dr. Rentz practices at Beloit Memorial Hospital in Beloit, Wisconsin, part of Beloit Health System.
Dr. Rentz's NPI, 1255996872, was assigned on May 8, 2019. Dr. Rentz graduated from University of Cincinnati College of Medicine in 2019. Dr. Rentz holds Wisconsin license 80122-20.
- NPI
- 1255996872NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284961707
- NPI enumeration date
- May 8, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (608) 364-5011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Frederick Rentz practices at Beloit Memorial Hospital in Beloit, Wisconsin
Dr. Rentz's primary practice is Beloit Memorial Hospital, at 1969 W Hart Rd, Beloit, WI 53511 in Rock County. The practice phone is (608) 364-5011.
- Beloit Memorial Hospital1969 W Hart Rd, Beloit, WI 53511 · Rock CountyPhone(608) 364-5011
Source: Dmand AI Affiliation Data
Dr. Michael Frederick Rentz is affiliated with 5 sites of care and 3 medical groups
Dr. Rentz's primary practice is Beloit Memorial Hospital in Beloit, Wisconsin, part of Beloit Health System. Dr. Rentz is also affiliated with Froedtert Hospital. The medical group on file is Southern Wisconsin Emergency Associates (SWEA). Dmand AI also links Dr. Rentz to 2 more hospitals, 2 medical groups and 1 dialysis center, 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. Michael Frederick Rentz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rentz practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Beloit Memorial Hospital | Available with a free account |
| +4 more sites and 2 medical groups | 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 Beloit Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Frederick Rentz is one of 1,211 emergency medicine physicians in Wisconsin
Emergency medicine is Dr. Rentz's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Rentz is licensed in Wisconsin.
Specialties and state licenses
- Emergency medicine, WisconsinPrimary
Emergency medicine physicians near Dr. Rentz
Counts of emergency medicine physicians 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. Michael Frederick Rentz billed Medicare for 602 services in 2024
CMS data shows 602 Medicare services from Dr. Rentz across 5 procedure codes in 2024, for 415 Medicare patients. Medicare paid $45,709 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rentz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3132024: 40329%
- Tests and treatments
- 2023: 1342024: 19949%
Dr. Rentz compared with the Wisconsin median for emergency medicine physicians, 2024
- Dr. Rentz
- Wisconsin median
- Medicare services
- 602vs 2462.4 times
- Medicare patients
- 415vs 22188% above
- Part D claims
- 104vs 5782% above
Medians across 1,249 emergency medicine physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Rentz'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.
Need commercial claims for Dr. Rentz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rentz and other emergency medicine physicians in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Frederick Rentz treated 415 Medicare patients in 2024, average age 72
CMS counts 415 Medicare patients who saw Dr. Rentz in 2024. The largest group is 65 to 74, with 124 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.37, 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. Rentz's median patient age at 53, with 60% women.
Dr. Rentz's Medicare patients by age, 2024
Dr. Rentz's Medicare patients by sex, 2024
- Women23557%
- Men18043%
Chronic conditions among Dr. Rentz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Arthritis52%
- Chronic kidney disease44%
- Anxiety39%
- Mood disorders39%
- Diabetes37%
- Ischemic heart disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rentz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Frederick Rentz wrote 190 Medicare Part D claims in 2024
In 2024, Dr. Rentz wrote 190 Medicare Part D claims for 142 patients. 95% of them were for generic drugs. CMS names the drug for 104 of them, across 6 drugs with 11 or more claims each, at $612 in total drug cost. In 2023, CMS named 42 claims across 3 drugs.
Dr. Rentz's Part D claims by kind of drug, 2024
- Generic180 claims95%
- Brand-name and other10 claims5%
Dr. Rentz'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. Rentz's Part D claims, 2024
- Opioids13%25 of 190 claims
- Antibiotics42%80 of 190 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: 422024: 104148%
Drugs named by CMS: 6 in 2024, 3 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
How Dr. Michael Frederick Rentz takes part in Medicare
Dr. Rentz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Michael Frederick Rentz received $125 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Rentz from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Actelion Pharmaceuticals US, Inc. paid the most, $125.
Companies that paid Dr. Rentz the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Frederick Rentz graduated from University of Cincinnati College of Medicine
Dr. Rentz graduated from University of Cincinnati College of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Frederick Rentz'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)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. Michael Frederick Rentz
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. Michael Frederick Rentz's NPI number?
Dr. Michael Frederick Rentz's NPI number is 1255996872. It was assigned on May 8, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Frederick Rentz?
Dr. Michael Frederick Rentz is an emergency medicine physician in Beloit, Wisconsin. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Michael Frederick Rentz practice?
Dr. Rentz practices at 1969 W Hart Rd, Beloit, WI 53511. Dr. Rentz's primary practice is Beloit Memorial Hospital in Beloit, Wisconsin, part of Beloit Health System. Dmand AI also links Dr. Rentz to 2 hospitals, 2 medical groups and 1 dialysis center.
What is Dr. Michael Frederick Rentz's office phone number?
The practice phone on file for Dr. Rentz is (608) 364-5011.
What is Dr. Michael Frederick Rentz's medical license number?
Dr. Rentz holds Wisconsin license 80122-20.
Which hospitals is Dr. Michael Frederick Rentz affiliated with?
Dr. Rentz practices at Beloit Memorial Hospital in Beloit, Wisconsin. Dr. Rentz is also affiliated with Froedtert Hospital. Dmand AI links Dr. Rentz to 2 more hospitals.
What medical group is Dr. Michael Frederick Rentz part of?
Dr. Rentz is linked to Southern Wisconsin Emergency Associates (SWEA). Dmand AI links Dr. Rentz to 2 more medical groups.
Does Dr. Michael Frederick Rentz accept Medicare?
Yes. CMS data shows Dr. Rentz billed Medicare for 602 services in 2024, and Dr. Rentz accepts Medicare assignment.
How many Medicare patients does Dr. Michael Frederick Rentz see?
CMS counts 415 Medicare patients who saw Dr. Rentz in 2024, with an average age of 72.
What services does Dr. Michael Frederick Rentz bill to Medicare?
In 2024, Dr. Rentz's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
Show 4 more questionsShow fewer questions
Where did Dr. Michael Frederick Rentz go to medical school?
Dr. Rentz graduated from University of Cincinnati College of Medicine in 2019.
What drugs does Dr. Michael Frederick Rentz prescribe most?
In 2024 Medicare Part D data, Dr. Rentz's most prescribed drugs by claims were Oxycodone HCl, Ondansetron ODT and Cephalexin.
Has Dr. Michael Frederick Rentz received payments from drug or device companies?
CMS Open Payments shows $125 in general payments to Dr. Rentz from 1 company from 2024 to 2024. The largest total came from Actelion Pharmaceuticals US, Inc.
How long has Dr. Michael Frederick Rentz been practicing?
Dr. Rentz graduated from medical school in 2019, 7 years ago.
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