Grant Kosharek
Dentist · Madison, WI
Grant Kosharek is a dentist with a practice address in Madison, Wisconsin, and NPI 1679331151, issued on Mar 11, 2024. Check the license (Wisconsin 6001574-15, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grant Kosharek
- Primary taxonomy
- Dentist 122300000X
- License number
- 6001574-15 WI
Self-reported in NPPES; status is on the state search - Practice location
- 440 Science Dr Ste 100, Madison, WI 53711
- Phone
- (608) 308-2950
- Enumerated
- Mar 11, 2024
- Record last updated
- Sep 17, 2024
- Entity
- Type 1 · individual
8 nearest dentist records → All 1,750 in Wisconsin → Look up another NPI →
Also registered at 440 Science Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Friend, DDSGeneral Practice Dentistry1700496007
- Andrea Geffin, DMDDentist1336724160
Verify Grant Kosharek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 6001574-15Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average dentist in 2024
13 Medicare Part D claims for 11 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% 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.
Grant Kosharek among 1,750 dentist records in Wisconsin
Grant Kosharek is one of 1,750 dentist records with a practice address in Wisconsin. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 90% of them.
- NPI issued2024 · 90% of these records are older, 6% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2024 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in Wisconsin
There are 1,750 dentist records in Wisconsin.
All 1,750 in Wisconsin → Every provider in Madison → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Nicholas Anders, D.D.S., M.S.Fitchburg, WI 537111538470844
- Leah Felkner, DDSMadison, WI 537111811203235
- Andrea Geffin, DMDMadison, WI 537111336724160
- Todd Herpy, D.D.SMadison, WI 537111649652769
- Nathan Kroll, DDSMadison, WI 537111295170371
- Lowell LakritzMadison, WI 537111619126448
- Nicholas Mannarino, D. D. S.Madison, WI 537111831215912
- Alysha Rolli, DMDMadison, WI 537111760975395
Common questions
What is Grant Kosharek's NPI number?
Grant Kosharek's National Provider Identifier (NPI) is 1679331151, issued on Mar 11, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Grant Kosharek located?
The NPPES record lists a practice address at 440 Science Dr Ste 100, Madison, WI, 53711. Phone: (608) 308-2950. Providers update this record themselves, so call before visiting.
How can I verify Grant Kosharek's license?
NPPES lists Wisconsin license number 6001574-15, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Grant Kosharek prescribe under Medicare Part D?
In 2024, Grant Kosharek had 13 Medicare Part D claims for 11 beneficiaries; the average among dentist prescribers was 86. 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.