Katherine Lynn Erstad, NP
- Hospital affiliations
- 2
- Industry payments
- $21
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2011
- Practice address
- 2000 E Milestone Dr, Appleton, WI 54913
- Practice phone
- Call (920) 731-8131
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fox Valley Surgical Associates Ltd
Appleton, Wisconsin
Find Katherine Erstad's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Katherine Lynn Erstad is a nurse practitioner in Appleton, Wisconsin
Katherine Erstad practices at Fox Valley Surgical Associates Ltd in Appleton, Wisconsin.
Katherine Erstad's NPI, 1497033609, was assigned on July 22, 2011. Katherine Erstad holds Wisconsin license 4894-33.
- NPI
- 1497033609NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002088531
- NPI enumeration date
- July 22, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 731-8131
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Katherine Lynn Erstad practices at Fox Valley Surgical Associates Ltd in Appleton, Wisconsin
Katherine Erstad's primary practice is Fox Valley Surgical Associates Ltd, at 2000 E Milestone Dr, Appleton, WI 54913 in Outagamie County. The practice phone is (920) 731-8131.
- Fox Valley Surgical Associates Ltd2000 E Milestone Dr, Appleton, WI 54913 · Outagamie CountyPhone(920) 731-8131
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Katherine Lynn Erstad is affiliated with 4 sites of care and 1 medical group
Katherine Erstad's primary practice is Fox Valley Surgical Associates Ltd in Appleton, Wisconsin. Katherine Erstad is also affiliated with ThedaCare Regional Medical Center-Appleton. The medical group on file is Fox Valley Surgical Specialists. Dmand AI also links Katherine Erstad to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Katherine Lynn Erstad's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Katherine Erstad practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fox Valley Surgical Associates Ltd | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Katherine Lynn Erstad is one of 3,198 nurse practitioners in Wisconsin
Nurse practitioner is Katherine Erstad's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Dmand AI has Katherine Erstad's licenses on file in 2 states: Wisconsin and Texas.
Specialties and state licenses
- Nurse practitioner, WisconsinPrimary
- Family nurse practitioner, Texas
Nurse practitioners near Katherine Erstad
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Katherine Lynn Erstad's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Katherine Erstad's median patient age at 56, with 78% women.
Katherine Erstad's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women78%
- Men22%
Source: Dmand AI Patient Panel Data
How Katherine Lynn Erstad takes part in Medicare
Katherine Erstad accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Katherine Lynn Erstad received $21 in industry payments in 2025
CMS Open Payments shows 1 general payment to Katherine Erstad from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Sequel Med Tech, LLC paid the most, $21.
Companies that paid Katherine Erstad the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Katherine Lynn Erstad's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Katherine Lynn Erstad
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Katherine Lynn Erstad's NPI number?
Katherine Lynn Erstad's NPI number is 1497033609. It was assigned on July 22, 2011, and it is active in the NPI Registry.
What does Katherine Lynn Erstad specialize in?
Katherine Lynn Erstad is a nurse practitioner in Appleton, Wisconsin. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Katherine Lynn Erstad practice?
Katherine Erstad practices at 2000 E Milestone Dr, Appleton, WI 54913. Katherine Erstad's primary practice is Fox Valley Surgical Associates Ltd in Appleton, Wisconsin. Dmand AI also links Katherine Erstad to 1 hospital and 1 group practice or clinic.
What is Katherine Lynn Erstad's office phone number?
The practice phone on file for Katherine Erstad is (920) 731-8131.
What is Katherine Lynn Erstad's medical license number?
Katherine Erstad holds Wisconsin license 4894-33, one of the licenses on file in 2 states.
Which states has Katherine Lynn Erstad been licensed in?
Dmand AI has state licenses on file for Katherine Erstad in Wisconsin and Texas.
Which hospitals is Katherine Lynn Erstad affiliated with?
Katherine Erstad is affiliated with ThedaCare Regional Medical Center-Appleton. Dmand AI links Katherine Erstad to 1 more hospital.
What medical group is Katherine Lynn Erstad part of?
Katherine Erstad is linked to Fox Valley Surgical Specialists.
Does Katherine Lynn Erstad accept Medicare?
Yes. CMS lists Katherine Erstad as accepting Medicare assignment.
Has Katherine Lynn Erstad received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Katherine Erstad from 1 company from 2025 to 2025. The largest total came from Sequel Med Tech, LLC.
How long has Katherine Lynn Erstad been practicing?
Katherine Erstad graduated from medical school in 2011, 15 years ago.
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