Michael Frederick Rentz, MD, MPH
Emergency Medicine Physician · Milwaukee, WI
Michael Frederick Rentz, MD, MPH is an emergency medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1255996872, issued on May 8, 2019. Check the license (Wisconsin 80122-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael Frederick Rentz
- Credential
- MD, MPH
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 80122-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 9200 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 955-6450
- Enumerated
- May 8, 2019
- Record last updated
- Jul 21, 2023
- Fax
- (414) 955-0082
- Medicaid ID
- 1255996872 WI
- Medicare enrollment
- Enrolled (PECOS I20220706002420); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 9200 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Frederick Rentz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 80122-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average emergency medicine physician in 2024
190 Medicare Part D claims for 142 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Oxycodone Hcl23 claims
- Ondansetron Odt21 claims
- Cephalexin20 claims
- Amoxicillin-Clavulanate Potass16 claims
- Doxycycline Hyclate13 claims
- Sulfamethoxazole-Trimethoprim11 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: $124.99
1 payment: food and beverage; the largest payer was Actelion Pharmaceuticals US, Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
Bills Medicare through 2 group practices
- Froedtert Andthe Medical College OF Wisconsin Community Physicians IncMenomonee Falls, WI
- The Medical College OF Wisconsin IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Frederick Rentz among 1,464 emergency medicine physician records in Wisconsin
Michael Frederick Rentz, MD, MPH is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2019 · median 2011 among the 844 with a school on file
- Record last updated2023 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
358 emergency medicine physician records list a practice address in Milwaukee
They are 358 of the 18,389 NPPES records with a practice address in Milwaukee, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Milwaukee → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Eric Adar, MDWauwatosa, WI 532261255325726
- Tom Aufderheide, MDMilwaukee, WI 532261336190859
- Charles Cady, MDMilwaukee, WI 532261831140227
- Louis-Marcel Cesar, M.D.Milwaukee, WI 532261235116690
- Mario Colella, D.O.Milwaukee, WI 532261336106277
- Stephen Hargarten, MDMilwaukee, WI 532261760433502
- Manuel Hernandez, M.D.Milwaukee, WI 532261336102540
- Michael Lutes, MDMilwaukee, WI 532261629029475
Common questions
What is Michael Frederick Rentz, MD, MPH's NPI number?
Michael Frederick Rentz, MD, MPH's National Provider Identifier (NPI) is 1255996872, issued on May 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Michael Frederick Rentz, MD, MPH located?
The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 955-6450. Providers update this record themselves, so call before visiting.
How can I verify Michael Frederick Rentz, MD, MPH's license?
NPPES lists Wisconsin license number 80122-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Frederick Rentz, MD, MPH prescribe under Medicare Part D?
In 2024, Michael Frederick Rentz, MD, MPH had 190 Medicare Part D claims for 142 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.