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Dr. Mark S Ruttum, MD

Ophthalmology Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1801848585

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark S Ruttum
Credential MD
Sex Male
Practice address 9000 W Wisconsin Ave, Pediatric Ophthalmology, Milwaukee, WI, 53226
Phone (414) 266-2020
Fax (414) 266-2027
Enumeration date May 17, 2006
Last updated in NPPES Sep 24, 2014

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 21829 (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
1801848585 Medicaid WI -
002000140V Other - HUMANA

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.

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Frequently asked questions

Where does Mark Ruttum practice?
The practice location on file with NPPES is in Milwaukee, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Ruttum?
The National Provider Identifier (NPI) for Mark Ruttum is 1801848585, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-24.