Margaret M. Leonhardt, M.D.
Family Medicine Physician · New Berlin, WI
Margaret M. Leonhardt, M.D. is a family medicine physician with a practice address in New Berlin, Wisconsin, and NPI 1538153416, issued on Sep 7, 2005. Check the license (Wisconsin 25980, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Margaret M. Leonhardt
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 25980 WI
Self-reported in NPPES; status is on the state search - Practice location
- 12901 W National Ave, New Berlin, WI 53151
- Phone
- (262) 782-7770
- Enumerated
- Sep 7, 2005
- Record last updated
- Dec 27, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (262) 785-6422
- Medicaid ID
- 3064550 WI
- Entity
- Type 1 · individual
Also registered at 12901 W National Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan Bonchak, M.D.Dermatology Physician1053670307
- David Crosby, MDDermatology Physician1538177738
- Dennis Garvin, APNPNurse Practitioner1013022037
- Elizabeth Gastineau, APNPNurse Practitioner1376197574
- Alexander Maley, M.D.Dermatology Physician1699018531
- Gabrielle Mannino, MDDermatology Physician1114338910
Verify Margaret M. Leonhardt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 25980Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36 family medicine physician records list a practice address in New Berlin
They are 36 of the 662 NPPES records with a practice address in New Berlin, and 3,765 family medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 36 in New Berlin → All 3,765 in Wisconsin → Every provider in New Berlin →
Other family medicine physician records in Wisconsin
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- 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 Margaret M. Leonhardt, M.D.'s NPI number?
Margaret M. Leonhardt, M.D.'s National Provider Identifier (NPI) is 1538153416, issued on Sep 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Margaret M. Leonhardt, M.D. located?
The NPPES record lists a practice address at 12901 W National Ave, New Berlin, WI, 53151. Phone: (262) 782-7770. Providers update this record themselves, so call before visiting.
How can I verify Margaret M. Leonhardt, M.D.'s license?
NPPES lists Wisconsin license number 25980, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.