Mrs. Katherine Lynn Erstad, NP
Mrs. Katherine Lynn Erstad is a Nurse Practitioner provider (Nurse Practitioner) practicing in Appleton, WI, registered in the NPPES registry with NPI 1497033609 since 2011. The credential NP stands for Nurse Practitioner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1497033609 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mrs. Katherine Lynn Erstad |
| Credential | NP |
| Sex | Female |
| Practice address | 145 W CALUMET ST, Appleton, WI, 54915 |
| Phone | 9209674141 |
| Fax | 8339721585 |
| Enumeration date | 2011-07-22 |
| Last updated in NPPES | 2024-11-13 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 363LF0000X | Family Nurse Practitioner | Secondary | TEMP | TX |
| 363LF0000X | Family Nurse Practitioner | Secondary | 4894 | WI |
| 363L00000X | Nurse Practitioner | Primary | 4894-33 | WI |
NP — Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential
Copy-ready billing details
Provider: Katherine Erstad, NP NPI: 1497033609 Taxonomy: 363L00000X (Nurse Practitioner) Address: 145 W CALUMET ST, Appleton, WI, 54915
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205922861 | David Olsen | Individual | Orthodontics and Dentofacial Orthopedics Dentistry | Appleton, WI |
| 1508142001 | Teresa Gajewski | Individual | Physician Assistant | Appleton, WI |
| 1033465679 | Kirsten Pethan | Individual | Physician Assistant | Appleton, WI |
| 1689088825 | Anne Jordan | Individual | Family Medicine Physician | Appleton, WI |
Verify this record
Cross-check NPI 1497033609 against the authoritative CMS record: view Mrs. Katherine Lynn Erstad on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
Where does Katherine Erstad practice?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-11-13.