Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Linus Leitschuh, MD

Cardiovascular Disease Physician in Mequon, WI · enumerated 2006.

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

National Provider Identifier

1336217066

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Registry record

Entity type Individual (Type 1)

Name Mark Linus Leitschuh

Credential MD

Sex Male

Practice address 13133 N Port Washington Rd, Suite 122, Mequon, WI, 53097

Phone (262) 243-3700

Fax (262) 243-3701

Enumeration date Dec 1, 2006

Last updated in NPPES Jun 12, 2012

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 31195 (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
31602900	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 is the NPI number for Mark Leitschuh?

The National Provider Identifier (NPI) for Mark Leitschuh is 1336217066, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Leitschuh practice?

The practice location on file with NPPES is in Mequon, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-12.