Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nathan Wallenfang, NP

Psychiatric/Mental Health Nurse Practitioner in Marinette, WI · enumerated 2016.

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

National Provider Identifier

1386090512

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Registry record

Entity type Individual (Type 1)

Name Nathan Wallenfang

Credential NP

Sex Male

Practice address 4061 Old Peshtigo Rd, Marinette, WI, 54143

Phone (715) 732-8100

Fax (715) 732-8007

Enumeration date May 6, 2016

Last updated in NPPES Jan 16, 2026

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6862 (WI) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6862 (WI) Primary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209-020256 (IL) Secondary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
100059198	Medicaid	WI	-
100159456	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 Nathan Wallenfang?

Nathan Wallenfang is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-16.