Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Theresa F Nielsen, FNP

Family Nurse Practitioner in Ketchikan, AK · enumerated 2006.

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

National Provider Identifier

1851462717

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Registry record

Entity type Individual (Type 1)

Name Theresa F Nielsen

Credential FNP

Sex Female

Practice address 2960 Tongass Ave, Ketchikan, AK, 99901

Phone (907) 228-4900

Fax (800) 852-3264

Enumeration date Nov 13, 2006

Last updated in NPPES Sep 6, 2016

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP128179 (TX) Primary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6696 (CT) Secondary

FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

Other identifiers

Identifier	Type	State	Issuer
1851462717	Medicaid	VA	-

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 Theresa Nielsen practice?

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

What is the NPI number for Theresa Nielsen?

The National Provider Identifier (NPI) for Theresa Nielsen is 1851462717, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-06.