Ryan Kerstan, R.PH
Pharmacist · Pewaukee, WI
Ryan Kerstan, R.PH is a pharmacist with a practice address in Pewaukee, Wisconsin, and NPI 1689045007, issued on Oct 12, 2015. Check the license (Wisconsin 18094-40, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ryan Kerstan
- Credential
- R.PH
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 18094-40 WI
Self-reported in NPPES; status is on the state search - Practice location
- 443 Pewaukee RD, Pewaukee, WI 53072
- Phone
- (262) 956-6701
- Enumerated
- Oct 12, 2015
- Record last updated
- Oct 12, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 5,397 in Wisconsin → Look up another NPI →
Also registered at 443 Pewaukee RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bartlomiej Celer, ODOptometrist1790459758
- Edward Manteufel, RPHPharmacist1528666336
- Marie Schackmuth, PHARMDPharmacist1275364606
Verify Ryan Kerstan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 18094-40Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average pharmacist in 2024
13 Medicare Part D claims for 12 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 92% 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.
Ryan Kerstan among 5,397 pharmacist records in Wisconsin
Ryan Kerstan, R.PH is one of 5,397 pharmacist records with a practice address in Wisconsin. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 52% of them.
- NPI issued2015 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2015 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 pharmacist records list a practice address in Pewaukee
They are 21 of the 413 NPPES records with a practice address in Pewaukee, and 5,397 pharmacist records in Wisconsin.
All 5,397 in Wisconsin → Every provider in Pewaukee → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Caroline Ball, PHARMDPewaukee, WI 530721396365375
- Adam LabsPewaukee, WI 530721851660187
- Katie LaufenbergPewaukee, WI 530721003186321
- Edward Manteufel, RPHPewaukee, WI 530721528666336
- Suzan Otto, RPHPewaukee, WI 530721528337011
- Deborah Peterson, RPHPewaukee, WI 530721053931659
- Todd Ralenkotter, RPHPewaukee, WI 530721417348954
- Mary Pat RondinelliPewaukee, WI 530721992170237
Common questions
What is Ryan Kerstan, R.PH's NPI number?
Ryan Kerstan, R.PH's National Provider Identifier (NPI) is 1689045007, issued on Oct 12, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Kerstan, R.PH located?
The NPPES record lists a practice address at 443 Pewaukee RD, Pewaukee, WI, 53072. Phone: (262) 956-6701. Providers update this record themselves, so call before visiting.
How can I verify Ryan Kerstan, R.PH's license?
NPPES lists Wisconsin license number 18094-40, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Ryan Kerstan, R.PH prescribe under Medicare Part D?
In 2024, Ryan Kerstan, R.PH had 13 Medicare Part D claims for 12 beneficiaries; the average among pharmacist prescribers was 119. 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.