James S. Iwakiri, MD
Urology Physician · Eau Claire, WI
James S. Iwakiri, MD is a urology physician with a practice address in Eau Claire, Wisconsin, and NPI 1972689057, issued on Oct 31, 2006. Check the license (Wisconsin 35227-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- James S. Iwakiri
- Credential
- MD
- Primary taxonomy
- Urology Physician 208800000X
- License numbers
- 35227-020 WI
35227 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3217 Stein Boulevard, Eau Claire, WI 54701
- Phone
- (715) 835-6548
- Enumerated
- Oct 31, 2006
- Record last updated
- Sep 3, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (715) 835-7708
- Medicaid IDs
- 8455228-00 MN
32048400 WI - Medicare enrollment
- Enrolled (PECOS I20110302000753); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest urology physician records → All 259 in Wisconsin → Look up another NPI →
Also registered at 3217 Stein Boulevard
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Josiah Nelson, MDUrology Physician1376595074
- Christopher Tornehl, MDUrology Physician1548482177
Verify James S. Iwakiri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 35227-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% more Medicare Part D claims than the average urology physician in 2024
2,545 Medicare Part D claims for 573 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 127 claims were for opioids.
Most prescribed
- Tamsulosin Hcl517 claims
- Finasteride181 claims
- Myrbetriq168 claims
- Oxybutynin Chloride117 claims
- Solifenacin Succinate114 claims
- Tramadol Hcl103 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 72.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $694.20
30 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 9,340 providers of this specialty with any payment received $3,800.04 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
- Mchs Hospitals IncMarshfield, WI
- Western Wisconsin UrologyChippewa Falls, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James S. Iwakiri among 259 urology physician records in Wisconsin
James S. Iwakiri, MD 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 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 43% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1994 · median 2002 among the 166 with a school on file
- Record last updated2009 · 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 Eau Claire → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Nicole Dodge, MDEau Claire, WI 547011184144149
- Michael Hirsh, MDEau Claire, WI 547011346326428
- Devin Johnson, M.D.Eau Claire, WI 547011154365625
- David Katz, MDEau Claire, WI 547011053497131
- Josiah Nelson, MDEau Claire, WI 547011376595074
- Christopher Tornehl, MDEau Claire, WI 547011548482177
- William Heth, MDEau Claire, WI 547031760460752
- Andrew Jahoda, MDEau Claire, WI 547031750582599
Common questions
What is James S. Iwakiri, MD's NPI number?
James S. Iwakiri, MD's National Provider Identifier (NPI) is 1972689057, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James S. Iwakiri, MD located?
The NPPES record lists a practice address at 3217 Stein Boulevard, Eau Claire, WI, 54701. Phone: (715) 835-6548. Providers update this record themselves, so call before visiting.
How can I verify James S. Iwakiri, MD's license?
NPPES lists Wisconsin license number 35227-020, 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 James S. Iwakiri, MD prescribe under Medicare Part D?
In 2024, James S. Iwakiri, MD had 2,545 Medicare Part D claims for 573 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is James S. Iwakiri, MD's MIPS final score?
The 2023 MIPS final score is 72.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.