Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Melissa A Nissen, MD

Urology Physician in Eau Claire, WI · enumerated 2013.

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

National Provider Identifier

1265774384

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Registry record

Entity type Individual (Type 1)

Name Melissa A Nissen

Credential MD

Sex Female

Practice address 1400 Bellinger St, Eau Claire, WI, 54703

Phone (715) 838-3311

Enumeration date Mar 27, 2013

Last updated in NPPES Aug 9, 2021

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 62669-20 (WI) Primary

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

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 Melissa Nissen?

The National Provider Identifier (NPI) for Melissa Nissen is 1265774384, a Type 1 (individual) record in the CMS NPPES registry.

Where does Melissa Nissen practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-09.