John Ganser, DO
Family Medicine Physician · Appleton, WI
John Ganser, DO is a family medicine physician with a practice address in Appleton, Wisconsin, and NPI 1922035658, issued on Jun 27, 2006. Check the license (Wisconsin 38921, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Ganser
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 38921 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2809 N Park Drive LN, Appleton, WI 54911
- Phone
- (920) 738-4600
- Enumerated
- Jun 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (920) 738-4792
- Medicaid ID
- 30084200 WI
- Medicare enrollment
- Enrolled (PECOS I20100223000852); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1996
- Entity
- Type 1 · individual
Also registered at 2809 N Park Drive LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Bautch, NPNurse Practitioner1750324000
- Jacob Birdsall, D-PTPhysical Therapist1205350865
- Jessica Griswold, APNPNurse Practitioner1427421783
- Jennifer Haen, NPAdult Health Nurse Practitioner1295193282
- Bridget Huenink, APNPNurse Practitioner1962595249
- Alexa Juzenas, PA-CPhysician Assistant1417232752
Verify John Ganser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 38921Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average family medicine physician in 2024
6,119 Medicare Part D claims for 486 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 106 claims were for opioids.
Most prescribed
- Atorvastatin Calcium555 claims
- Amlodipine Besylate291 claims
- Losartan Potassium286 claims
- Lisinopril213 claims
- Metformin Hcl Er181 claims
- Levothyroxine Sodium168 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
- Thedacare, IncorporatedAppleton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
108 family medicine physician records list a practice address in Appleton
They are 108 of the 3,249 NPPES records with a practice address in Appleton, and 3,765 family medicine physician records in Wisconsin.
All 108 in Appleton → All 3,765 in Wisconsin → Every provider in Appleton →
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 John Ganser, DO's NPI number?
John Ganser, DO's National Provider Identifier (NPI) is 1922035658, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Ganser, DO located?
The NPPES record lists a practice address at 2809 N Park Drive LN, Appleton, WI, 54911. Phone: (920) 738-4600. Providers update this record themselves, so call before visiting.
How can I verify John Ganser, DO's license?
NPPES lists Wisconsin license number 38921, 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 John Ganser, DO prescribe under Medicare Part D?
In 2024, John Ganser, DO had 6,119 Medicare Part D claims for 486 beneficiaries; 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.