Peter Joachim Niemann, M.D.
Internal Medicine Physician · La Crosse, WI
Peter Joachim Niemann, M.D. is an internal medicine physician with a practice address in La Crosse, Wisconsin, and NPI 1669602918, issued on Jul 21, 2009. Check the license on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Peter Joachim Niemann
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 13707 ND
21685 MN
Self-reported in NPPES; status is on the state search - Practice location
- 700 West Ave S, La Crosse, WI 54601
- Phone
- (608) 785-0940
- Enumerated
- Jul 21, 2009
- Record last updated
- Jul 21, 2022
- Medicaid ID
- 81905 ND
- Medicare enrollment
- Enrolled (PECOS I20150901001171); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 700 West Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Peter Joachim Niemann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average internal medicine physician in 2024
690 Medicare Part D claims for 142 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Atorvastatin Calcium53 claims
- Clopidogrel36 claims
- Lisinopril30 claims
- Carbamazepine26 claims
- Pantoprazole Sodium26 claims
- Cefdinir25 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.
2 hospitals and group practices
- Avera Queen OF PeaceMitchell, SD · Critical Access Hospitals4 of 5 stars
- Sanford Health NetworkVermillion, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Peter Joachim Niemann among 2,078 internal medicine physician records in Wisconsin
Peter Joachim Niemann, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 35% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2007 · median 2002 among the 1,098 with a school on file
- Record last updated2022 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
110 internal medicine physician records list a practice address in La Crosse
They are 110 of the 3,735 NPPES records with a practice address in La Crosse, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in La Crosse → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Christine Miller, MDLa Crosse, WI 546011366445934
- David Momont, MDLa Crosse, WI 546011649272964
- Sheila Momont, MDLa Crosse, WI 546011285636506
- Brian Mulrennan, MDLa Crosse, WI 546011073515391
- David Norenberg, MDLa Crosse, WI 546011235131517
- Steven Pearson, MDLa Crosse, WI 546011356343693
- Joan Romeyn, MDLa Crosse, WI 546011588667174
- Amanda Strosahl, MDLa Crosse, WI 546011063416857
Common questions
What is Peter Joachim Niemann, M.D.'s NPI number?
Peter Joachim Niemann, M.D.'s National Provider Identifier (NPI) is 1669602918, issued on Jul 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Peter Joachim Niemann, M.D. located?
The NPPES record lists a practice address at 700 West Ave S, La Crosse, WI, 54601. Phone: (608) 785-0940. Providers update this record themselves, so call before visiting.
How can I verify Peter Joachim Niemann, M.D.'s license?
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 Peter Joachim Niemann, M.D. prescribe under Medicare Part D?
In 2024, Peter Joachim Niemann, M.D. had 690 Medicare Part D claims for 142 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.