Catherine L. Onsrud, FNP
Family Nurse Practitioner · Watertown, WI
Catherine L. Onsrud, FNP is a family nurse practitioner with a practice address in Watertown, Wisconsin, and NPI 1902981673, issued on Oct 25, 2006. Check the license (Wisconsin 2986-033, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Catherine L. Onsrud
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 2986-033 WI
Self-reported in NPPES; status is on the state search - Practice location
- 109 Air Park Dr, Watertown, WI 53094
- Phone
- (262) 928-5100
- Enumerated
- Oct 25, 2006
- Record last updated
- Oct 18, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (262) 928-5111
- Medicaid ID
- 39846100 WI
- Medicare enrollment
- Enrolled (PECOS I20061113000460); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Also registered at 109 Air Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine L. Onsrud in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2986-033Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family nurse practitioner in 2024
256 Medicare Part D claims for 71 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 14 claims were for opioids.
Most prescribed
- Pantoprazole Sodium18 claims
- Metoprolol Tartrate12 claims
- Atorvastatin Calcium11 claims
- Eliquis11 claims
- Potassium Chloride11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Mercy Health System CorporationJanesville, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine L. Onsrud among 2,814 family nurse practitioner records in Wisconsin
Catherine L. Onsrud, FNP is one of 2,814 family nurse practitioner records with a practice address in Wisconsin. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 90% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2006 · median 2019 among the 1,740 with a school on file
- Record last updated2007 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 family nurse practitioner records list a practice address in Watertown
They are 16 of the 366 NPPES records with a practice address in Watertown, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Watertown → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Amber Hendriksen, NPWatertown, WI 530941881244358
- Gwen Herzog, RNWatertown, WI 530941467832667
- Nancy Ryan, APNPJohnson Creek, WI 530941780752832
- Cherri Schleicher, APNPWatertown, WI 530941851350383
- David Smiley, APNPWatertown, WI 530941720709751
- Kathryn Spors, APRN, FNPJohnson Creek, WI 530941952743072
- Jody Burri, APNPWaldo, WI 530931063024495
- Jane Kassens, APRNWest Bend, WI 530951578731899
Common questions
What is Catherine L. Onsrud, FNP's NPI number?
Catherine L. Onsrud, FNP's National Provider Identifier (NPI) is 1902981673, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine L. Onsrud, FNP located?
The NPPES record lists a practice address at 109 Air Park Dr, Watertown, WI, 53094. Phone: (262) 928-5100. Providers update this record themselves, so call before visiting.
How can I verify Catherine L. Onsrud, FNP's license?
NPPES lists Wisconsin license number 2986-033, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Catherine L. Onsrud, FNP prescribe under Medicare Part D?
In 2024, Catherine L. Onsrud, FNP had 256 Medicare Part D claims for 71 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.