Dirk M. Nuenninghoff, MD
Rheumatology Physician · Portage, WI
Dirk M. Nuenninghoff, MD is a rheumatology physician with a practice address in Portage, Wisconsin, and NPI 1538109053, issued on Jun 7, 2006. Check the license (Wisconsin 45438-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Dirk M. Nuenninghoff
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 45438-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2977 County Hwy CX, Portage, WI 53901
- Phone
- (608) 745-3399
- Enumerated
- Jun 7, 2006
- Record last updated
- Aug 4, 2025
- Medicaid ID
- 1538109053 WI
- Medicare enrollment
- Enrolled (PECOS I20050915001073); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 154 in Wisconsin → Look up another NPI →
Also registered at 2977 County Hwy CX
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Dirk M. Nuenninghoff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 45438-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,005 Medicare Part D claims for 148 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 75 claims were for opioids.
Most prescribed
- Methotrexate142 claims
- Hydroxychloroquine Sulfate129 claims
- Prednisone105 claims
- Methotrexate Sodium53 claims
- Sulfasalazine51 claims
- Hydrocodone-Acetaminophen50 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 2 group practices
- Dean Health Systems IncWaterloo, WI
- University OF Wisconsin Medical Foundation IncPortage, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dirk M. Nuenninghoff among 154 rheumatology physician records in Wisconsin
Dirk M. Nuenninghoff, MD is one of 154 rheumatology physician records with a practice address in Wisconsin. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 48% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1998 · median 2004 among the 97 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Wisconsin
There are 154 rheumatology physician records in Wisconsin.
All 154 in Wisconsin → Every provider in Portage → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Joanne Kriege, MDBaraboo, WI 539131033152061
- Daniel Malone, MDBeaver Dam, WI 539161346216371
- Virginia Wilson, MDBeaver Dam, WI 539161558312900
- Safiyya Abdulkadir, MDMadison, WI 537921093455826
- Barkha Amlani, M.B,B.SMadison, WI 537921518221928
- Andrew McClintockMadison, WI 537921902485196
- Roshniben Patel, MDMadison, WI 537921073019907
- Freya ShahMadison, WI 537921356126593
Common questions
What is Dirk M. Nuenninghoff, MD's NPI number?
Dirk M. Nuenninghoff, MD's National Provider Identifier (NPI) is 1538109053, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dirk M. Nuenninghoff, MD located?
The NPPES record lists a practice address at 2977 County Hwy CX, Portage, WI, 53901. Phone: (608) 745-3399. Providers update this record themselves, so call before visiting.
How can I verify Dirk M. Nuenninghoff, MD's license?
NPPES lists Wisconsin license number 45438-020, 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 Dirk M. Nuenninghoff, MD prescribe under Medicare Part D?
In 2024, Dirk M. Nuenninghoff, MD had 1,005 Medicare Part D claims for 148 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.