Michael A. Zimmer, MD
Emergency Medicine Physician · La Crosse, WI
Michael A. Zimmer, MD is an emergency medicine physician with a practice address in La Crosse, Wisconsin, and NPI 1477712750, issued on Jun 3, 2008. Check the license (Wisconsin 56967-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael A. Zimmer
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 56967-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 700 West Avenue S, La Crosse, WI 54601
- Phone
- (608) 785-0940
- Enumerated
- Jun 3, 2008
- Record last updated
- May 27, 2025
- Medicare enrollment
- Enrolled (PECOS I20121012000817); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2008
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 700 West Avenue S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael A. Zimmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 56967-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average emergency medicine physician in 2024
119 Medicare Part D claims for 95 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Cefadroxil18 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 one group practice
- Mayo Clinic Health System-Southwest Wisconsin Region IncLa Crosse, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael A. Zimmer among 1,464 emergency medicine physician records in Wisconsin
Michael A. Zimmer, MD 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 2008, is newer than 48% of them.
- NPI issued2008 · 48% of these records are older, 48% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2008 · median 2011 among the 844 with a school on file
- Record last updated2025 · 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).
72 emergency medicine physician records list a practice address in La Crosse
They are 72 of the 3,735 NPPES records with a practice address in La Crosse, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in La Crosse → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Scott Brunk, MDLa Crosse, WI 546011497759062
- Stephen Copps, MDLa Crosse, WI 546011548265804
- Christopher Eberlein, MDLa Crosse, WI 546011629073739
- Aaron Hanesworth, MDLa Crosse, WI 546011790780302
- David Hendrickson, MDLa Crosse, WI 546011457341950
- Jeffery Hillesland, MDLa Crosse, WI 546011730184219
- Stephen Israel, MDLa Crosse, WI 546011376539700
- Daniel Lenselink, MDLa Crosse, WI 546011518957018
Common questions
What is Michael A. Zimmer, MD's NPI number?
Michael A. Zimmer, MD's National Provider Identifier (NPI) is 1477712750, issued on Jun 3, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Zimmer, MD located?
The NPPES record lists a practice address at 700 West Avenue S, La Crosse, WI, 54601. Phone: (608) 785-0940. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Zimmer, MD's license?
NPPES lists Wisconsin license number 56967-20, 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 A. Zimmer, MD prescribe under Medicare Part D?
In 2024, Michael A. Zimmer, MD had 119 Medicare Part D claims for 95 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.