NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marc Eiseman, M.D.

Anesthesiology Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1124091855

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Marc Eiseman
Credential M.D.
Sex Male
Practice address 945 N 12th St, Milwaukee, WI, 53233
Phone (414) 219-2000
Enumeration date Feb 13, 2006
Last updated in NPPES Dec 2, 2021

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 41571 (WI) Primary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 41571 (WI) Secondary
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
88567290007 Other WI BC/BS
32588800 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

Where does Marc Eiseman 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 Marc Eiseman?
The National Provider Identifier (NPI) for Marc Eiseman is 1124091855, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-02.