John A. Feilbach, M.D.
Internal Medicine Physician · Grafton, WI
John A. Feilbach, M.D. is an internal medicine physician with a practice address in Grafton, Wisconsin, and NPI 1538191168, issued on Jul 6, 2006. Check the license (Wisconsin 33495, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John A. Feilbach
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 33495 WI
Self-reported in NPPES; status is on the state search - Practice location
- 215 Washington St, Grafton, WI 53024
- Phone
- (262) 375-3700
- Enumerated
- Jul 6, 2006
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (262) 376-6020
- Medicaid ID
- 31871700 WI
- Medicare enrollment
- Enrolled (PECOS I20051215000677); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 215 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Terence Beilfuss, P.T.Physical Therapist1376574640
- Adam Calusic, DOFamily Medicine Physician1790713436
- Alexandra Carley, M.D.Dermatology Physician1083843114
Verify John A. Feilbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 33495Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
141 Medicare Part D claims for 124 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin41 claims
- Ciprofloxacin Hcl23 claims
- Amoxicillin-Clavulanate Potass13 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
- Aurora Advanced Healthcare, Inc.Mequon, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John A. Feilbach among 2,078 internal medicine physician records in Wisconsin
John A. Feilbach, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1991 · median 2002 among the 1,098 with a school on file
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 internal medicine physician records list a practice address in Grafton
They are 19 of the 459 NPPES records with a practice address in Grafton, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Grafton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Muhammed Al-Fawakhiri, MDGrafton, WI 530241942276613
- Daniel Attanasio, D.O.Grafton, WI 530241609801380
- Melinda Bonilla-Puetz, MDGrafton, WI 530241942233101
- Richard Bunting, MDGrafton, WI 530241730111964
- Katherine Burrows, DOGrafton, WI 530241942323878
- William Ebinger, MDGrafton, WI 530241700818952
- Ashwini Gundelly, M.D.Grafton, WI 530241750310801
- Domingo Hong, MDGrafton, WI 530241811915358
Common questions
What is John A. Feilbach, M.D.'s NPI number?
John A. Feilbach, M.D.'s National Provider Identifier (NPI) is 1538191168, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John A. Feilbach, M.D. located?
The NPPES record lists a practice address at 215 Washington St, Grafton, WI, 53024. Phone: (262) 375-3700. Providers update this record themselves, so call before visiting.
How can I verify John A. Feilbach, M.D.'s license?
NPPES lists Wisconsin license number 33495, 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 A. Feilbach, M.D. prescribe under Medicare Part D?
In 2024, John A. Feilbach, M.D. had 141 Medicare Part D claims for 124 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.