John Seidl, MD
Family Medicine Physician · Milwaukee, WI
John Seidl, MD is a family medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1700838430, issued on May 17, 2006. Check the license (Wisconsin 25426, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Seidl
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 25426 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1121 E North Ave, Milwaukee, WI 53212
- Phone
- (414) 267-6500
- Enumerated
- May 17, 2006
- Record last updated
- Mar 6, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (414) 267-3894
- Medicaid ID
- 1700838430 WI
- Medicare enrollment
- Enrolled (PECOS I20081202000467); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1982
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 1121 E North Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Seidl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 25426Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average family medicine physician in 2024
251 Medicare Part D claims for 89 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Lisinopril20 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 2 group practices
- Froedtert Andthe Medical College OF Wisconsin Community Physicians IncMenomonee Falls, WI
- Outreach Community Health Centers IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Seidl among 3,765 family medicine physician records in Wisconsin
John Seidl, MD is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1982 · median 2007 among the 2,347 with a school on file
- Record last updated2019 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
299 family medicine physician records list a practice address in Milwaukee
They are 299 of the 18,389 NPPES records with a practice address in Milwaukee, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Milwaukee → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gregory Brotzman, MDMilwaukee, WI 532121487605853
- Frederick Deboe, MDMilwaukee, WI 532121639284821
- Cynthia Floore, MDMilwaukee, WI 532121235126632
- Tito Izard, M.D.Milwaukee, WI 532121013947662
- David Johnson, MDMilwaukee, WI 532121235180084
- Gary Lee Kolesari, MDMilwaukee, WI 532121326099169
- John Krueger, M.D.Milwaukee, WI 532121134165913
- Katherine Lichtenberg, D.O.Milwaukee, WI 532121487627568
Common questions
What is John Seidl, MD's NPI number?
John Seidl, MD's National Provider Identifier (NPI) is 1700838430, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Seidl, MD located?
The NPPES record lists a practice address at 1121 E North Ave, Milwaukee, WI, 53212. Phone: (414) 267-6500. Providers update this record themselves, so call before visiting.
How can I verify John Seidl, MD's license?
NPPES lists Wisconsin license number 25426, 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 Seidl, MD prescribe under Medicare Part D?
In 2024, John Seidl, MD had 251 Medicare Part D claims for 89 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.