Karri L. Ratzlaff, RN, MS
Nurse Practitioner · Janesville, WI
Karri L. Ratzlaff, RN, MS is a nurse practitioner with a practice address in Janesville, Wisconsin, and NPI 1467571851, issued on Mar 28, 2007. Check the license (Wisconsin 3038, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karri L. Ratzlaff
- Credential
- RN, MS
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 3038 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Mineral Point Ave, Janesville, WI 53548
- Phone
- (608) 756-6611
- Enumerated
- Mar 28, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071026000538); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,995 in Wisconsin → Look up another NPI →
Also registered at 1000 Mineral Point Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karri L. Ratzlaff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3038Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average nurse practitioner in 2024
61 Medicare Part D claims for 36 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Cephalexin28 claims
- Hydrocodone-Acetaminophen19 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).
Karri L. Ratzlaff among 3,995 nurse practitioner records in Wisconsin
Karri L. Ratzlaff, RN, MS is one of 3,995 nurse practitioner records with a practice address in Wisconsin. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 18% of them.
- NPI issued2007 · 18% of these records are older, 77% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2006 · median 2017 among the 2,701 with a school on file
- Record last updated2007 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 nurse practitioner records list a practice address in Janesville
They are 43 of the 1,538 NPPES records with a practice address in Janesville, and 3,995 nurse practitioner records in Wisconsin.
All 3,995 in Wisconsin → Every provider in Janesville → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Jennifer Bestland, RN, APNPJanesville, WI 535481801819701
- Kristine Bohrmueller, ARNPJanesville, WI 535481386945558
- Linda Brethauer, RN NPJanesville, WI 535481053328617
- Rachel Brueggen, APRNJanesville, WI 535481528675824
- Kelli Casper, ACNP, RNJanesville, WI 535481538260625
- Courtney Castelein, APRN, FNPJanesville, WI 535481932648771
- Nicole Disch, APRN, AGPCNP-BCJanesville, WI 535481760839062
- Tanya Haney, APNPJanesville, WI 535481114018926
Common questions
What is Karri L. Ratzlaff, RN, MS's NPI number?
Karri L. Ratzlaff, RN, MS's National Provider Identifier (NPI) is 1467571851, issued on Mar 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karri L. Ratzlaff, RN, MS located?
The NPPES record lists a practice address at 1000 Mineral Point Ave, Janesville, WI, 53548. Phone: (608) 756-6611. Providers update this record themselves, so call before visiting.
How can I verify Karri L. Ratzlaff, RN, MS's license?
NPPES lists Wisconsin license number 3038, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Karri L. Ratzlaff, RN, MS prescribe under Medicare Part D?
In 2024, Karri L. Ratzlaff, RN, MS had 61 Medicare Part D claims for 36 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.