Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret M. Leonhardt, M.D.

Family Medicine Physician in New Berlin, WI · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538153416

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Margaret M. Leonhardt

Credential M.D.

Sex Female

Practice address 12901 W National Ave, New Berlin, WI, 53151

Phone (262) 782-7770

Fax (262) 785-6422

Enumeration date Sep 7, 2005

Last updated in NPPES Dec 27, 2010

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 25980 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
P00627769	Other	WI	RR MEDICARE
3064550	Medicaid	WI	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Margaret Leonhardt?

Margaret Leonhardt is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-27.