Nathan D. Grunewald
Urology Physician · Prairie Du Sac, WI
Nathan D. Grunewald is a urology physician with a practice address in Prairie Du Sac, Wisconsin, and NPI 1396044509, issued on Mar 28, 2011. Check the license (Wisconsin 57602-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nathan D. Grunewald
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 57602-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 260 26TH St, Prairie Du Sac, WI 53578
- Phone
- (608) 643-3311
- Enumerated
- Mar 28, 2011
- Record last updated
- Mar 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160907002362); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2011
- Entity
- Type 1 · individual
8 nearest urology physician records → All 259 in Wisconsin → Look up another NPI →
Also registered at 260 26TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Armbruster, APSWSocial Worker1730595075
- James Armstrong, NPNurse Practitioner1477518140
- Teresa Bare-InmanPhysical Therapy Assistant1780249243
- Laura Bixby, APNPFamily Nurse Practitioner1508520123
- Kelsey Brady, MSW, LCSWClinical Social Worker1902390768
- Sandra Carroll, CRNACertified Registered Nurse Anesthetist1952086944
Verify Nathan D. Grunewald in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 57602-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average urology physician in 2024
372 Medicare Part D claims for 123 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Tamsulosin Hcl98 claims
- Nitrofurantoin52 claims
- Finasteride41 claims
- Myrbetriq33 claims
- Oxybutynin Chloride Er28 claims
- Sulfamethoxazole-Trimethoprim20 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
- Sauk Prairie Healthcare IncPrairie Du Sac, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan D. Grunewald among 259 urology physician records in Wisconsin
Nathan D. Grunewald is one of 259 urology 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 2011, is newer than 70% of them.
- NPI issued2011 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2011 · median 2002 among the 166 with a school on file
- Record last updated2021 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Wisconsin
There are 259 urology physician records in Wisconsin.
All 259 in Wisconsin → Every provider in Prairie Du Sac → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Nathan Moore, M.D.Monroe, WI 535661083650287
- Ngii Tazeh, M.D., PH.DMonroe, WI 535661508123787
- Andrew Graf, MDVerona, WI 535931366407058
- Gary Licklider, M.D.Middleton, WI 535621588998538
- Francis Kaveggia, MDJanesville, WI 535481699833251
- Hariharan Palayapalayam Ganapathi, MDJanesville, WI 535481154860526
- Mitchell Kopnick, MDJanesville, WI 535461730129560
- Gray RobergeJanesville, WI 535461528412533
Common questions
What is Nathan D. Grunewald's NPI number?
Nathan D. Grunewald's National Provider Identifier (NPI) is 1396044509, issued on Mar 28, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Nathan D. Grunewald located?
The NPPES record lists a practice address at 260 26TH St, Prairie Du Sac, WI, 53578. Phone: (608) 643-3311. Providers update this record themselves, so call before visiting.
How can I verify Nathan D. Grunewald's license?
NPPES lists Wisconsin license number 57602-20, 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 Nathan D. Grunewald prescribe under Medicare Part D?
In 2024, Nathan D. Grunewald had 372 Medicare Part D claims for 123 beneficiaries; the average among urology physician prescribers was 1,340. 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.