Ira S. Kastenberg, MD
Family Medicine Physician · Poynette, WI
Ira S. Kastenberg, MD is a family medicine physician with a practice address in Poynette, Wisconsin, and NPI 1295785483, issued on May 11, 2006. Check the license (Wisconsin 20342-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ira S. Kastenberg
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20342-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 237 W Seward St, Poynette, WI 53955
- Phone
- (608) 635-4343
- Enumerated
- May 11, 2006
- Record last updated
- May 6, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (608) 635-7094
- Medicaid ID
- 30295300 WI
- Entity
- Type 1 · individual
Verify Ira S. Kastenberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 20342-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
22 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of 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.
1 family medicine physician records list a practice address in Poynette
They are 1 of the 31 NPPES records with a practice address in Poynette, and 3,765 family medicine physician records in Wisconsin.
Other family medicine physician records in Wisconsin
- Ashraf AbbasAppleton, WI1558723775
- Ghudran Abdulal, MDNew Berlin, WI1083622666
- Yusuf Abdullah, DOSun Prairie, WI1437788478
- Vanessa Abejuela-Matt, D.O.Mount Pleasant, WI1558687749
- Emily Abeyta, MDWaukesha, WI1386905107
- Jeanette Abraham, MDWeston, WI1205895810
- Sarada Abraham, M.D.Oconomowoc, WI1962851972
- Kirsten Abramson, MDMadison, WI1417909979
- Alexandra Adams, MD PHDMadison, WI1184689291
- David AdamsMadison, WI1992986897
Common questions
What is Ira S. Kastenberg, MD's NPI number?
Ira S. Kastenberg, MD's National Provider Identifier (NPI) is 1295785483, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ira S. Kastenberg, MD located?
The NPPES record lists a practice address at 237 W Seward St, Poynette, WI, 53955. Phone: (608) 635-4343. Providers update this record themselves, so call before visiting.
How can I verify Ira S. Kastenberg, MD's license?
NPPES lists Wisconsin license number 20342-020, 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 Ira S. Kastenberg, MD prescribe under Medicare Part D?
In 2024, Ira S. Kastenberg, MD had 22 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.